Nine years to get a reply isn't to bad. Try contacting the council to fill in potholes and see how long that takes.
@thretlite2 сағат бұрын
And that's about average for a second-class post.
@Studyinghumans32 минут бұрын
10 years minimum
@Joshua-by4qv4 сағат бұрын
One of the best things about this channel is that Dr. Becky names and credits the authors of the studies and shows the publication. What's really inspirational is how young so many of these researchers are.
@daveh77203 сағат бұрын
I've noticed most academics I see online are careful to give credit where it's due. I think it's great.
@SgtGuarnereDD7 сағат бұрын
Hi Becky! I hear you mention the star GJ 876 in this video and refer to it as "Gilese 876", but I think it's actual name is "Gliese 876". Minor difference, but might make it easier for people who're interested and want to look up the star for themselves 🤗 Keep up the good work, I love your videos ❤
@camerynmaru8 сағат бұрын
It's always a great day when it's another Dr. Becky video available. Love your stuff!
@ghaznavid7 сағат бұрын
Have you read her book? Really well written, worth reading - she explains super complex stuff in a surprisingly simple way.
@ramondulvur6 сағат бұрын
Some nitpicks: First exoplanets were discovered in 1992 by Aleksander Wolszczan and team around pulsar PSR B1257+12. There's no reason to discount that. The name Gliese, as in Gliese 876 and other objects in Gliese catalog come from a German astronomer Wilhelm Gliese. His name is pronounced [ˈɡliːzə]. There's audible E sound at the end. 51 Peg b shouldn't be referred to as just "Pegasi b". Neither should 47 UMa b referred to as "Ursae Majoris b". We are talking about planets around stars, not constellations. The numbers are important.
@TheDanEdwards2 сағат бұрын
" a German astronomer Wilhelm Gliese. His name is pronounced [ˈɡliːzə]. "
@pattheplanterСағат бұрын
@@TheDanEdwards Definitely not pronounced or written as Gilese, as Becky kept doing.
@EnglishMikeСағат бұрын
There is when you start the video explicitly limiting the list to exoplanets in orbit around regular stars.
@theunknownunknowns2566 сағат бұрын
Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemists, but that's just peanuts to space. Douglas Adams
@EnglishMikeСағат бұрын
Belgium!
@geoffmarcy6777 сағат бұрын
This video provides an accurate and compelling description of the first exoplanets ever discovered, and how we discovered them. Another excellent video. Thank you, Dr. Becky. (Yes, it has been 29 years since our discoveries of the first three exoplanets: 51 Pegasi, 70 Virginis, and 47 Ursae Majoris, in late 1995.)
@versedi5 сағат бұрын
12:40 NO APPEARANCE BUT STILL WITH US IN SOUND. PRAISE CAT Awesome episode :)
@Raven67947 сағат бұрын
Another great video. I wish your enthusiasm and ability to explain science in an entertaining way could be taught to Australia’s science community. Interest in science would be so much higher.
@MCsCreations6 сағат бұрын
Thanks for all the info, dr. Becky! 😊 Stay safe there with your family! 🖖😊
@turkalega7 сағат бұрын
Great video, but I think it misses the first exoplanets, which as first were also the closest to us at the time. After wiki: "On 9 January 1992, radio astronomers Aleksander Wolszczan and Dale Frail announced the discovery of two planets orbiting the pulsar PSR 1257+12". Sure, a pulsar isn't a typical star, but a star nonetheless :)
@geoffmarcy6777 сағат бұрын
Absolutely correct. Good point.
@sydhenderson67536 сағат бұрын
@@geoffmarcy677 At one point she does mention that 51 Pegasi b was the first exoplanet found orbiting a normal star. But I immediately thought of the pulsar planets too.
@takanara75 сағат бұрын
Part of the problem might be that people weren't sure that they were actually planets, some people thought they might be brown dwarf companions. One major issue was at the time people thought big gas giant planets had to be far away from their suns, like they are in the solar system.
@geoffmarcy6775 сағат бұрын
@@takanara7 True - Good point. The theorists told us that gas giant planets would all be far from the host star - at least 3x farther than Earth is from Sun. Hence, our discovery of the giant planet around 47 Ursae Majoris, at more than 2.1 AU from the star, convinced many people that we had actually discovered bona fide planets.
@mpzrd4 сағат бұрын
There might as well be lots of rogue planets out there that we can't see yet and some of them might be pretty close
@EnglishMike2 сағат бұрын
She did qualify the list of exoplanets at the beginning of the video as ones in orbit around a sun-like star. Thus she also omitted the very first exoplanets to be found which were in orbit around a neutron star.
@qazsedcft21627 сағат бұрын
It blows my mind that they can detect wobbles of a few meters per second at several light years of distance.
@geoffmarcy6777 сағат бұрын
This is an astute point. Using the Doppler effect, we measure changes in the wavelengths of light with 8 significant digits. The formula is: Delta Lambda / Lambda = Velocity / c. So, 1 m/s is tiny compared to the speed of light, 3 x 10^8 m/s.
@plektosgaming3 сағат бұрын
@@geoffmarcy677 Once we set up observational equipment in the future on The Moon or in deep space, we will easily gain another order of magnitude better results. 10 digit precision is certainly possible within our lifetimes.
@fedfraud.protection.servic25573 сағат бұрын
Is it possible to down convert the incoming wavefront and measure the phase shift on the longer wavelength, like in heterodyne receivers? I sometimes see high blue - indigo patches in my H-alpha photographers that aren't there in the master darks. I figure that the H-alpha is being modulated and I'm seeing sideband. 😂😂. Welcome any other ideas 💡.
@fedfraud.protection.servic25573 сағат бұрын
@@geoffmarcy677Lick does have one awesome spectrum setup. 0.1 or even 0.01 nm or better. Not sure about Hubble or JWST. JWST is probably NIR.
@geoffmarcy6772 сағат бұрын
@@plektosgaming Good idea! Our motto: Back Side of the Moon, or Bust!
@gerryccarroll2817 сағат бұрын
Great video, clear explanations.
@marcusdirk6 сағат бұрын
Dr. Becky balances a pen on her finger: that's going to be in the bloopers! 🙂
@andrewcatlin35907 сағат бұрын
We could eventually build something like the Breakthrough Starshot that could reach the proxima centaur in just around 20 years. Human space travel would still not be able to reach that 20% light speed but we could hopefully get images and other data back from not too far in the future
@zvorenergy4 сағат бұрын
Thanks to relativity, the trip is shorter onboard. I believe at 1 g acceleration you could traverse the Universe in a lifetime.
@plektosgaming3 сағат бұрын
@@zvorenergy At 99.99% C, you get roughly 5.17 days per "year", meaning you could travel 71YL per "year". Figuring a 50-60 year expected lifetime after training to be on a mission ( say, at 20 -25 ), you get about 4000LY. Anything longer would certainly require multi-generational ships or suspended animation or similar to be developed.
@zvorenergy3 сағат бұрын
@@plektosgaming I predict no shortage of volunteers for one-way tickets aboard fleets of large, full gravity, comfortable, self-sufficient, rotating habitats outward bound. It's not for most people, but then explorers, scientists, and pioneers never are.
@andrewcatlin3590Сағат бұрын
@@zvorenergy that’s not how that works. 1 g of acceleration is essentially nothing compared to the relativistic speeds needed for time dilation. Unless your referring to a constant 1 g acceleration however this wouldn’t get you to relativistic speed due to energy constraints
Kipping is just about to start his JWST time for exo-moons and that’ll be huge if his team does too!
@Valdagast7 сағат бұрын
Perfectly balanced, as all things should be. I read that the pivot point for the Earth-Sun system is like twenty metres from the center of the Sun, which really puts into prespective how absolutely _massive_ the Sun is.
@tinathelasttwenty12497 сағат бұрын
I ❤️ Ground News, I’ve been with Ground News for 3 years now and I still find news outlets that offers accurate information ❤
@AnonymousFreakYT7 сағат бұрын
1:00 - Hey, we could find a rogue exoplanet in the Lagrange point between the Alpha Centauri system and our Sun! :-P
@AlanZucconi8 сағат бұрын
Thank you for making this Becky! 🙏 I published my first "proper" video on KZbin back in 2019, and it was a 360-degree journey through all exoplanets discovered at the time! 🪐 Five years later, I find exoplanets one of the most fascinating topics in science! 🤩
@pdxjeff17 сағат бұрын
This stuff is amazing, can you imagine what we be true for over the next 100 years. I also, am excited that Kepler-167 is the target for JWST today. Department of Astronomy, Columbia University's JWST approval project.
@carlettoburacco92356 сағат бұрын
The best "advertising" for the search for exoplanets remains in my opinion the "singing sky" of NASA-JPL. Especially when it comes to the cacophony of notes around tiny search clusters where there are not enough pixels to put all the planets. Maybe we will not get there in a short time and quickly, but there is certainly no shortage of targets.
@WilliamHensley19637 сағат бұрын
awesome clip. thanks for including the example of how long it would take the Parker Solar Probe to get there as a point of reference!
@qazsedcft21627 сағат бұрын
Just a little nitpick about the speed of the Parker probe. Technically, it doesn't count as the fastest because it's still gravitationally bound to the Sun. It's like dropping a rock from a tall mountain, measuring the speed of the rock when it reaches the bottom, and then claiming you can throw a rock that fast. The actual fastest object we have thrown out of the solar system is Voyager 1 and it's only moving at about 17 km/s.
@patryn367 сағат бұрын
Here is a counter to your nitpick, the parker probe did not fall directly into that orbit, they used gravity assists to alter speed and direction plus they used a booster to get it out of earth's orbit. Also, all speeds are estimates since the sun is orbiting the galaxy and the galaxy itself is likely moving. To get a realistic speed value you need a stationary reference point to measure as zero and with the universe being like it is finding a stationary object is going to be next to impossible if not completely impossible.
@kaseyboles306 сағат бұрын
@@patryn36 There is no zero motion in the universe. ALL motion is relative and which of two object who's distance between them is changing is the moving one or indeed if only one is moving, depends on your reference frame. This is fundamental to relativity and all experiments to date are consistent with relativity. Therefore you a free to pick any item as your stationary reference point. The sun is a valid choice.
@Coops122416 сағат бұрын
Voyager 1 used gravity assists as well.
@qazsedcft21626 сағат бұрын
@@patryn36 If you used the same gravity assists to make a solar escape trajectory the speed would be in the 10-15 km/s not the hundreds that it achieves only at perihelion. Your argument about universal speed is silly. All that matters if you want to travel to another star is your relative velocity to that star. BTW, an interesting fact is that nearby stars are actually travelling at similar speeds to our fastest probes - about 10s of km/s. With our current technology it would be faster to wait for a star to fly by us than to send a probe there. 🤣
@takanara75 сағат бұрын
New Horizons' velocity is 23 km/s, which is more then 17. Also, in order to get close to the sun you need to cancel out the earth's orbital velocity of 29km/s, so still takes a ton of energy to get close to the sun.
@kevinL54257 сағат бұрын
What warps my mind is if I could travel there at 99% the speed of light, for people on Earth it would take me about 4.29 years, but for me the trip would only be about 7.26 months due to time dilation. (At least if the AI I asked gave me the right answer)
@michaelsommers23562 сағат бұрын
You don't use AI to answer questions such as that. It's a simple calculation using high-school algebra.
@aimanrazi42548 сағат бұрын
Thanks Becky for keeping my interest in Astrophysics❤❤ I would do anything to become like you in the future❤❤
@Jatheus7 сағат бұрын
Love it! Eridani was featured in "Project Hail Mary" by Andy Weir. Great book! More recently, I read "The Sparrow", which is about the discovery of intelligent life on one of Proxima's planets and a mission to visit the aliens. I don't know if the tech they used to get there was plausible or not, but they used an asteroid as a vehicle (they built crew compartment facilities on it) and a "mass driver", whatever that is, to get up to relativistic speeds that got them there in 6 months crew time (26 years for Earth). I think they were essentially using the mass of the asteroid as propellant? Anyway, it was an interesting book. So... the only chance of finding a closer planet is our very own planet 9? If it is there? I don't suppose rogue planets would really qualify since they wouldn't be bound to a nearby system. Fun stuff! :0)
@SelbyRadabahСағат бұрын
Love it that you show the bloopers!
@TheOldBlackCrow6 сағат бұрын
Love the video! Just listened to a great conversation between Sam Harris and Sara Imari Walker about astrobiology and physics... Great week for brain expansion!
@swampnutz8 сағат бұрын
Really wish they had pointed the JWST at the 10 closest rocky exoplanets in the habitable zones of their stars.
@takanara75 сағат бұрын
You have to wait for them to pass in front of their stars in order to get spectra, you can't just do it whenever you want.
@EnglishMike51 минут бұрын
@@takanara7 If they can pin down the transit times accurately enough, they might have a go, but there's a lot of competition for observation time on JWST.
@Morbius9077 сағат бұрын
There will be a new closest exoplanet in the future. Barnard's star, which has an exoplanet, will make its closest approach to Earth in the year 11,800 at a distance of 3.85 light-years.
@thomasleathrum71565 сағат бұрын
51 Pegasi b was not the first exoplanet found, it was the first exoplanet found in orbit around a sun-like star. The first exoplanet found was in orbit around a pulsar, PSR B1257+12 -- to be fair, that makes this particular exoplanet a freakishly inhospitable place, but it is still an exoplanet. Just wanted to be clear about the exoplanet record.
@EnglishMikeСағат бұрын
_"51 Pegasi b ... was the first exoplanet found in orbit around a sun-like star."_ That's exactly what she said, which is why she left out the ones around the pulsar.
@rickseiden16 сағат бұрын
What blows my mind is that there could be a civilization out there that is looking at the Sun and seeing it wobble deducing that there's an "Earthlike" planet in the habitable zone.
@francesw.67744 сағат бұрын
If they could detect the ever-increasing levels of CO2 in our atmosphere, they would probably roll their eyes and go, "Oh, it's one of those kind of planets".
@plektosgaming3 сағат бұрын
@@francesw.6774 All planets go through the same stages, most likely. The trick is do we nuke ourselves, AI get rid of us, or we die from genetic experimentation and/or cross-species contamination first? If we can get past these major obstacles, we're likely good for the next few thousand years.
@daveh77203 сағат бұрын
@@francesw.6774 I wonder what they think of our "I Love Lucy" and "Star Trek" reruns they're getting on their radio telescopes.
@michaelsommers23562 сағат бұрын
And concluding that there is no intelligent life on that planet.
@michaelsommers23562 сағат бұрын
@@daveh7720 It's not likely that aliens could receive our TV signals. Broadcasters don't waste money sending their signals into space; they limit them to where their potential viewers are. The local car dealer isn't going to pay to have his ads beamed to Proxima Centauri. He wants them to go to people who might buy his cars.
@TomLeg7 сағат бұрын
So they just launched the Europa Clipper which will get there in ten years or so. What are the ground crew doing in the meantime? Would make a good video. Maybe team up with Smarter Every Day Destin!
@silentwilly29836 сағат бұрын
Have a little bit of patience, Proxima Centauri is approaching us, in about 26000 years it will only be about 3.1 lightyears away. Combine that with a bit of technological improvement to say 10% of lightspeed and you can do a return trip within a life time.
@michaelsommers23562 сағат бұрын
In a lifetime if you set out when you're a baby. And, due to radiation and the other dangers of interstellar travel, your lifetime is likely to be very short.
@SolaceEasy4 сағат бұрын
Planets unbound to stars could be closer to us than the Proxima Centauri system. I have seen such discussed recently. Detections now are limited to transits of known stars.
@fedfraud.protection.servic25573 сағат бұрын
I think that might be in error. Alpha Centauri is the nearest Star to Sol.
@fedfraud.protection.servic25573 сағат бұрын
Unbound. Sorry. My error.😂😂. How are we gonna detect them?
@EnglishMikeСағат бұрын
Right but if you watch the start of the video again, she limits her talk to planets in orbit around sun-like stars.
@csh431665 сағат бұрын
I love that simulation of the multiple planet system going around its star. For some reason, I just find it fascinating!!
@Khyranleander7 сағат бұрын
"Closest exoplanet" still might change. In theory IAU might someday officially include planemos, & one _might_ eventually drift closer than 4 light years. Not holding my breath. (IMO, all space rocks are planets, just have size categories & a handful of other special labels like life-bearing "world".)
@Flesh_Wizard7 сағат бұрын
If they have icy moons in an elliptical orbit, the moons may have life inside them. Like a rotten, icy egg with bacteria inside
@nickdumas24953 сағат бұрын
As soon as a second planet is discovered in the system, then the closest known exoplanet will change on a weekly basis as they orbit at different speeds.
@EnglishMike58 минут бұрын
But they still wouldn't be included in this video -- watch her spell out her criteria at the start of the video.
@J3AD6 сағат бұрын
great video, thank you
@PtolemyJones7 сағат бұрын
How can they tell the difference in the wobble created by one planet and more than one?
@geoffmarcy6777 сағат бұрын
The possibility of several planets is always on our mind. But if so, each planet must have a different distance from the star (to avoid collision) and thus must have a different orbital period. Each planet will yank gravitationally on the star causing a different period in the Doppler shift of the star's light. So, in such cases, we detect multiple periodicities in the Doppler shifts, all superimposed on each other.
@wallykramer7566Сағат бұрын
Speaking if Brit pronunciation, consider the word _idea_ which Becky says in this video. She says it with an _R_ sound near the end. Is Becky less erudite that other Brits? Hard to tell from just a few hundred of her videos. But I would suspect it is British pronunciation is the overriding problem!
@michaelsommers2356Сағат бұрын
That's not a specifically British pronunciation. I've heard a number of Americans use it, too.
@dardo19828 сағат бұрын
I'd really love to communicate with you... 🤗
@uni-byte2 сағат бұрын
Hmm, the other 5 of the 10 closest planets are just further out. We could go to 20 too. All the planets in The Milky Way are closer than those in Andromeda, and they are the only ones in The Milky Way that are closer than the ones in Andromeda - TADAAAA! What do I win? Besides a bad opening line, I love your stuff!
@chijanofuji4 сағат бұрын
It's Gliese 876b, not Gilese 876b, that orbits the star Gliese 876. Gliese [pronounced GLEE-zə in English] , named after the German astronomer Wilhelm Gliese (1915-1993), from his "Catalogue of Nearby Stars".
@Odin0297 сағат бұрын
I know it's not scientific, but I like the name 'wobble method'.
@geoffmarcy6777 сағат бұрын
Inferring the existence, the orbital period, and even the mass of a planet simply by the "wobble" of the star remains a remarkable technique!
@EnglishMikeСағат бұрын
Someone else in the comments hates the name so much they quit watching, and took the time to express their disgust at such condescension. (I kid you not!)
@geoffmarcy67736 минут бұрын
@@EnglishMike The reason I called it "The wobble method" back in the 1983 when I used it to search for brown dwarf companions is that our Jupiter yanks gravitationally on the Sun, causing it to move only the distance of the radius of the Sun. So, the Sun merely pirouettes around a point near the surface of the Sun.
@defdaz7 сағат бұрын
Depressing af ending Dr. Becky! ;)
@WWeronko2 сағат бұрын
My own interest is Kapteyn's Star's planet Kapteyn b. As the oldest-known potentially habitable planet, estimated to be 11 billion years old, in the habitable zone in a relatively nearby star (13 light-years away), it had much time to develop life. Perhaps even technological life. Being a super-Earth it might have been able to retain an atmosphere from the known temperamental nature of class M1 red subdwarfs. Kapteyn's Star may once have been member of Omega Centauri, a globular cluster that was gravitationally stripped from Omega Centauri by the Milky Way. Globular clusters in general and Omega Centauri, in particular are very old structures and had much time for civilizations to form in them.
@lanimulrepus2 сағат бұрын
I have not heard much discussion about "wobbly" for many years... Of course, according to Dr Who, if you can fit "wibbly" into the discussion, we'd be getting close to talking about scalar curvature coefficients and dimensions of the Blue Box...
@hw37072 сағат бұрын
Dr. Becky, I have a hypothetical argument that challenges your statement, "There won’t be another that holds the title" of the closest exoplanet to Earth. Imagine a stellar-mass black hole located nearer to us than Proxima Centauri b, with a planet orbiting it. Such a planet would be difficult to detect since the black hole doesn’t emit light, making it nearly impossible to spot through traditional methods of observation.
@EnglishMike2 сағат бұрын
Sure, but she was talking explicitly about exoplanets in orbit around Sun-like stars. There's also the possibility that rogue planets could be discovered closer, but they won't be in orbit around a Sun-like star.
@michaelsommers2356Сағат бұрын
But we would be able to detect a black hole that close to us, if only because of gravitational lensing.
@neoanderson72 сағат бұрын
Space is always truly humbling. 🙂 If we ever get to maybe the 2500’s or the 2600’s, we might be close to throwing something remotely close to the speed of light. Hopeful! 🤞🏻👏🏻😎
@seraphuziel6 сағат бұрын
just 4.5 away sounds so deceptively close, thanks science fiction! :D interesting nail color.
@SirHeinzbond31 минут бұрын
Hello Dr. Becky i would love to hear you talking about known "Rogue" Planets out there too...hard to find any content about them that is not related to speculation...
@daveh77203 сағат бұрын
Tim over at Acapella Science needs to update his exoplanet medley, Whole New Worlds.
@Ithirahad2 сағат бұрын
The headlines about how SpaceX allegedly was grabbing Falcon Heavy with huge arms are funny. Those boosters are not designed for that, do not have enough control, and the steering fins would probably cave into the top of the rocket if you tried anyway because they're only designed to handle aerodynamic forces and not literally being manhandled by a giant robot.
@michaelsommers23562 сағат бұрын
They don't use the fins to catch the rockets. There are protuberances on the body of the rocket that they use for that.
@TheCrosshare7 сағат бұрын
Some of these planets are definetaly worth getting...exoited about :D Ok, i'll get me coat.
@ferengiprofiteer69084 сағат бұрын
That manhole cover we shot into space ahead of a nuclear blast wave is bound to be the fastest thing we've made.
@davidcerutti87952 сағат бұрын
I am Lrrr, ruler of the plant Omicron Pegasi B!
@tomasetter7686Сағат бұрын
Thank you for saying the speed of light in m/s. It somehow made me happy😅
@BlunderMunchkin2 сағат бұрын
I still remember reading about the first exoplanet discovery in the New York Times. Paper edition, of course.
@MelindaGreen2 сағат бұрын
A 9 year roundtrip communication lag is not really a big deal because each civilization can immediately start sending information they believe might interest the other one. Answers to specific questions will just be one tiny part of that information, and will likely often be old news by the time they arrive.
@michaelsommers23562 сағат бұрын
But their politicians will have to spend years deciding whether to answer any messages the receive, so the round trip time will be, say, fifty years.
@EnglishMikeСағат бұрын
@@michaelsommers2356 I doubt that, once they realize it really doesn't matter what we tell them. If they have the capability of visiting us, they've already known we're here for decades, and probably hundreds of years, from studying Earth with far better telescopes than we currently have.
@EnglishMikeСағат бұрын
Yeah, it will be a two-way overlapping stream of information.
@michaelsommers235641 минут бұрын
@@EnglishMike Why do you think alien politicians will be any more sensible than human ones?
@netopir38044 сағат бұрын
All of the exoplanets defined to be in a habitable zone are far from being habitable for us. Most are much too cold, some are not rocky at all, but gaseous, we have no idea if they contain liquid water, let alone a breathable atmosphere. Considering the waste universe, this is not surprising … we cannot expect the garden of Eden to be just some few light years away.
@EnglishMikeСағат бұрын
We look for the ones we can currently detect. As our detection methods improve, we will eventually start detecting Earth-twins -- rocky planets in the habitable zone.
@plektosgaming3 сағат бұрын
The time it takes to get there with our current technology would be a bit over 7 years, including time to slow down. Our issue is the propulsion system. That calculation assumes a constant 1G acceleration for about a year to get to 90% of the speed of light. Then you coast and repeat the process to slow down.So it's merely a matter of figuring out how to get the propulsion and fuel worked out. Obviously you need something self-generating like a fusion power plant (or possibly an entire fuel plant?), though solar sails and other methods have been proposed to help the process. I suspect this will be normal activity within 100-200 years.
@EnglishMikeСағат бұрын
We don't have the means to get anywhere with our current technology. Just because it's theoretically feasible, doesn't mean it's actually doable. The energy budget alone is insane. Also, fusion could take another century or more before it's even practical for commercial use here on Earth.
@TechnicalBardСағат бұрын
Proxima Centauri b may be where the plans for the hyperspace bypass are posted
@Luke-qj5jn7 сағат бұрын
Yep, we will die alone on this planet...😑
@francesw.67744 сағат бұрын
Well, it's a pretty awesome planet with plenty of company, are at least it is until we completely f--k it up.
@UncleBildo44 минут бұрын
Wish there were some folks with $30B or so to throw together for a project. Multi-spectral probe continually sending and obtaining data for it's 150 year or whatever flight at the least would teach us a alot....... Stack enough boosters, and program enough slingshots around our heavy bodies, you'd think they could work up some major speed...... I couldn't do that math with calculator or fingers and toes, and I'm down to 5 toes... if that doesn't become our first apex interstellar transit, we might miss the boat.
@Leyrann7 сағат бұрын
I think I've caught an error of the kind where you've always been reading it wrong: It's "Gliese", not "Gilese" in that particular catalogue of stars (probably named after a telescope or scientist?). The L comes before the i.
@geoffmarcy6777 сағат бұрын
Yes. Wilhelm Gliese painstakingly cataloged all of the stars within 25 parsecs (that were known). en.wikipedia.org/wiki/Gliese_Catalogue_of_Nearby_Stars
@PhilW2223 сағат бұрын
The more I think about it, the more unlikely intersteller travel would be for ANY civilisation, however technically advanced. The distances are just so vast, and the energy and resources required to cross it are just so enormous.
@michaelsommers23562 сағат бұрын
Not to mention the risks inherent in interstellar travel, such as radiation and pebbles just going through space. Even a grain of dust at a significant fraction of the speed of light carries enough energy to do significant damage. But I think space junk in orbit around the planet is the biggest threat. We've been sending stuff into space for less than seventy years, and junk is already a real problem. Imagine what it will be like by the time we develop interstellar travel. I think that is the answer to the Fermi Paradox.
@EnglishMikeСағат бұрын
@@michaelsommers2356 Most of the space junk in LEO, which is the greatest threat today, would clear out naturally (orbital decay) within 25 years if there was a moratorium on new launches, and the relative speed any interstellar ship would be traveling soon after launch would mean anything higher up in orbit could easily be avoided or too small to cause catastrophic damage. On the other hand, any speck of dust that hits an interstellar craft going at a significant percentage the speed of light (say 20%) would strike with such force it would likely destroy the ship in an instant, and then there's the issue with all the high energy cosmic rays that would kill the electronics onboard, not to mention cause major health risks to the crew. The heavy shielding required to reduce those risks would make the trip orders of magnitude more difficult. It's the extreme distances and dangers of interstellar space that's by far the most difficult barrier to expansion.
@michaelsommers235619 минут бұрын
@@EnglishMike You have to go through LEO to go anywhere else. And there won't be a moratorium on launches, until they become too dangerous. That things in higher orbits could be easily avoided or would cause insignificant damage is just wishful thinking. Certainly radiation and debris make interstellar travel very dangerous, if not totally impractical, but space junk is not insignificant, especially after we've been putting stuff in orbit for a few centuries.
@tatotato857 сағат бұрын
The autor pictures are great
@Flesh_Wizard7 сағат бұрын
Dimidium (51 Pegasi b) is one of my favourite planets
@jimmeade29768 сағат бұрын
Fun Question: Is it a Blooper that Dr Becky's hair keeps moving from one side to the other during the video? Serious Question: Why do they theorize only one planet? Isn't it possible that several smaller planets could be causing the same wobble in the star?
@geoffmarcy6777 сағат бұрын
Excellent question! The possibility of several planets is always on our mind. But if so, each planet must have a different distance from the star (to avoid collision) and thus must have a different orbital period. Each planet will yank gravitationally on the star causing a different period in the Doppler shift of the star's light. So, in such cases, we detect multiple periodicities in the Doppler shifts, all superimposed on each other.
@michaelsommers2356Сағат бұрын
@@geoffmarcy677 What if the second planet is at L4 or L5? Not likely, of course, but conceivable.
@geoffmarcy677Сағат бұрын
@@michaelsommers2356 We would be fooled! It is difficult to distinguish between one planet and two planets locked in L4 or L5. Good point! And not impossible!
@EnglishMike53 минут бұрын
Some researchers have already claimed they can detect more than one planet around Proxima Centauri, but the results have not been confirmed yet.
@michaelsommers235629 минут бұрын
@@geoffmarcy677 Thanks for the reply. Assuming those were the only planets in the system, would it be possible at all to distinguish them? I suppose it might be possible if there were other planets.
@martynspooner58227 сағат бұрын
So it could be true that old wobbly Bob was really an alien who sussed how to move at the speed of light but passed himself off as an old drunk probably because he didnt need the hassle. I never believed him and now I learn the cleverest people just look out for the wobble. Wow me and my sceptical nature, gutted.
@richardschorel65783 сағат бұрын
Hi Dr Becky.. I'd love to visit and watch the stars with you on a wall size Tv thingy..xo
@dufusnoname3 сағат бұрын
I have to wonder if Dr. Becky has ever read the Bobiverse books :)
@pokechopachunky29053 сағат бұрын
My sister's son stayed with us while she was deployed and he is terrified of the dark. So we spent two light years with him until she returned 😂😂
@jerryhatley50048 сағат бұрын
…it will be many generations in the future before we can shake a hand (tentacle?) of a fellow cosmic traveler but I hope we can at the very least somehow communicate with one before I die to prove we are not alone…gets awfully lonely out here in the boondocks of a rather mundane galaxy….
@richardl67516 сағат бұрын
Slight correct: the Parker solar probe can go 191 kilometers per second.
@strikercwlСағат бұрын
"Habital zone" is a bit of stretch given the insane amount of radiation a Red Dwarf blast their planets with.
@gnorman-ct2lt4 сағат бұрын
They need to quit screwing around in space and start hitting some real speed records with the same enthusiasm they had breaking the sound barrier.(Nuclear)
@JynxedKoma4 сағат бұрын
Pegasi, you 'avin' a wobble, m8?
@greg-op2jhСағат бұрын
Some of these people in the comments are little picky poos! Enjoy the video yall. She does amazing work! Quit being ridiculous.❤
@leematthews68123 сағат бұрын
I should imagine any aliens watching our news channels wouldn't be in a rush to communicate with the planet of Hitler, Stalin, Pol Pot, Mao Zedong etc.
@MrCharliejaera8 сағат бұрын
Interesting👌
@Ketris06 сағат бұрын
Doesn't it seem more likely that these **very** massive planets detected via the wobble method are actually the combined data of an entire planetary system being detected? The masses would sum together, and the motion would average out.
@TheDanEdwards2 сағат бұрын
" and the motion would average out."
@michaelsommers2356Сағат бұрын
That would be detectable, due to the different periods of planets in different orbits. They look for things like that.
@TheCronedoggy8 сағат бұрын
Any chance of a rogue planet coming closer to Earth?
@Flesh_Wizard7 сағат бұрын
The chances are so small that it's called a "non-zero chance"
@pattheplanterСағат бұрын
@@Flesh_Wizard Until we can detect rogue planets reliably, there is no way of calculating the probability. There is a chance.
@beautifulsmall58 минут бұрын
cheese and Biscuits. black pepper and poppy seeds in oat. RedFox Chedar and Goosnasgh Gold. The French will always find something wobbeling first, Like Maigret in the selubrious estableshments.
@kiwiphoenix2 сағат бұрын
Hi Becky, from New Zealand, just wondering if there might be any Callenders on the market in the stars 🌟
@sebastianhuvenaars65378 сағат бұрын
Would be cool (and slightly scary) when Euclid spots a rogue plannet to snatch the title 🙂
@pattheplanterСағат бұрын
Nearest black hole could get interesting.
@francesw.67744 сағат бұрын
So at Parker Solo Probe speed, all we need to do is build a self-sustaining spacecraft, with a crew size and make-up capable of perpetually reproducing, and in just a matter of approximately 256 generations (7688 /30) humans could arrive at Proxima Centauri. Though it would be a bit of a disappointment to pay a house call after all those years and find that no one is home.
@wyrmhand7 сағат бұрын
In what video did You announce that You had become Dr. Becky? I remember it but cant find it 🤔
@michaelsommers2356Сағат бұрын
Dr. Becky had her PhD before she ever appeared on KZbin.
@kilroy9872 сағат бұрын
If we could get a craft to even half the speed of light by some form of constant ion propulsion, would relativity keep the wear of the craft smaller, since universe time is passing more slowly for it? That also means objects wear less around a black hole and close to the sun, too, due to the gravity wells. Hmm.
@EnglishMikeСағат бұрын
Time dilation doesn't really kick in until much closer to the speed of light. If you want to cut your (experienced) travel time in half, you have to travel at 86.6% the speed of light. Cutting the travel time to a quarter requires close to 97% the speed of light.
@pattheplanterСағат бұрын
It would age more slowly but it might be hitting dust at half the speed of light which would wear most materials quite quickly.
@michaelsommers2356Сағат бұрын
At 0.5 c, time passes about 20% more slowly than it does at rest, so a forty-year trip would appear to you to take thirty-two years. Not a significant saving.
@_nemo171Сағат бұрын
We are almost ready to contaminate other beings with our culture, wars and fears.
@philplasma6 сағат бұрын
I just wonder what life would be like on any of the Proxima Centauri planets when that star reaches perihelion with the Alpha Centauri pair of stars it orbits.
@pattheplanterСағат бұрын
A three body problem for an inhabited planet, it has been speculated in fiction. Netflix even made a series of the book.
@romado595 сағат бұрын
Proxima orbital acceleration is too high to be bounded, but it is. Matthews, Gilmore 1993 Is Proxima really in orbit about alpha and beta. mon. Not Royal Astro Soc., Vol.261, 1,L5-L7
@primoroy6 сағат бұрын
Still no AstroCat! 😥
@phild8095Сағат бұрын
It isn't about visiting and learning, it is about finding another planet where we can go and cut down forests, grow crops, mine the minerals and ruin the ecology of this other planet.
@edwardkreahling43838 минут бұрын
geeze, kinda of a downer view.
@oswaldkienapfel82994 сағат бұрын
Doppler effect or Wobble?
@Jesus.the.Christ7 сағат бұрын
We might find a starless planet closer than Alpha Centauri...
@danger2bananas7 сағат бұрын
I'm hoping we discover a moon/planet and we call it Acheron or lv426 😂
@davidbroman83918 сағат бұрын
Probably one of the best explanations of Doppler shift and exoplanet detection I have ever seen.