The Age of the Universe - Sixty Symbols

[@hpekristiansen]

When I took cosmology, the age of the universe was only 13.7 Gy and now it is already 13.8 Gy. Time sure flies fast.

[@blacklupus]

13.97 Gy. Heretic!

[@slikrx]

I seem to recall the age being listed as 14.5 Bn back when I was in Uni (1990-ish)

[@rebilacx]

I remember when the entire universe revolved around the sun and included all seven planets. Those were the days!

[@baley7]

hpekristiansen it was Tuesday as well!

[@leetakamiya2162]

Now it’s 13.8 billion and one day.

[@Sam_on_YouTube]

Tuesday, March 6th, give or take a couple hundred million years. This calls for a discussion of precision vs accuracy.

[@ragnkja]

Sam I second this

[@sergiokorochinsky49]

give them some slack... they didn't say if it was in the morning or the afternoon...

[@Sonny_McMacsson]

I second +12/-8 this.

[@jasonslade6259]

Of course, they didn't even use the correct length of a year, which is 365.2422 days. They added about 110 million years of error just from that! lol

[@StreuB1]

Dr Smethurst is such an amazing addition to the team. And of course, everyone loves Prof Copeland!

[@MrYukon2010]

I wish I had a teacher like Prof. Ed Copeland when I studied. Please keep the videos coming guys. This channel is one of the gems on KZbin.

[@lojanak60]

what a great moment it is to be notified for a new Sixty Symbols video!! thank you!

[@wademarshall2364]

I am really enjoying Dr. Smethurst's contributions. Keep up with the excellent videos!

[@juvinilebud]

Copeland will be giving a talk at my institution this upcoming tuesday. So excited!

[@jacobshirley3457]

How was it?

[@ChaosPootato]

I see prof. Copeland, I press like.

[@figbender3910]

The universe can be measured by how big his smile is

[@Rando_Shyte]

He's so loveable :)

[@handje1234]

That are some nice vertical writing skills at 6:19.

[@-yeme-]

7:57 is the probe saying that the rebels are on Hoth

[@TanookRoI]

I could watch Professor Copeland talk about the universe for days

[@dtrez3866]

Facinating what we are able to understand through mathematical calculations. Dr Smethurst and Dr Copeland were excellent. I apreciated their breakdowns/explanations.

[@GameDr04]

Dr Smethurst's handwriting could be a font.

[@daves.9479]

Dunno how some people can be that tidy.

[@dezkelz]

Being someone who takes a lot of pride in the neatness of my handwriting, I don't know how people can't be that tidy.

[@wokeupinapanic]

Function over form, Dean.

[@Qermaq]

She’s practically perfect!

[@technodruid]

@@Qermaq ew

[@koenth2359]

You drew that plot so quickly and neatly, even writing lopsided. And a convincing line through a point cloud like that! Wow.

[@jammyspreadd]

Brady your editing is so on point my man. The way you use editing to tell a coherent story like a script from seperate interviews is really good and makes learning all that more fun!

[@Quantiad]

I could listen to Becky for hours.

[@guymaudlin4055]

Dr. Becky is lovely.

[@korerahul7741]

Finally we can celebrate birthday of the universe. Thanks Becky. Love you.

[@yourlocalclosetedgaybestie3165]

ED IS BACK!!!!! AND ALSO BECKY!!!!! Edit: also assuming the statistics are accurate, big bang happened on Tuesday... wow!!! Brady is awesome!!!

[@victos-vertex]

Haven't seen the video yet, I just jumped out of bed because I saw the notification of a new video including Prof. Ed Copeland!

[@bustedrav]

I get irrationally excited whenever I see a notification for a new sixty symbols video.

[@kylep7503]

Becky did a great job explaining in this video. Love these

[@tejasmarathe2k]

Another great video from sixty symbols!!! One of the greatest science channels on KZbin.

[@CybranM]

Another great video, Dr Becky is the best :D

[@daturave]

I've missed ed doing all that physics stuff instead of these videos! ;´(

[@chicoktc]

Love Dr Becky!

[@BC3012]

In Dr B we trust 👌👏

[@evasuser]

"Another great video, Dr Becky is the best ", yeah, and cute too.

[@flymypg]

This was so fun. What was a dichotomy has become a blurred mess. It is great to have such major discoveries still being made, even if they won't get me replicators and warp drive.

[@Rangifulla]

We need more Dr. Becky

[@jackhiggy]

My favourite topic! Great to see someone I went to uni with on these videos!

[@jroemling]

It was a long time since you did a video combining two interviews in this way. Love it! 😍

[@thestoiccontrarian8962]

I love the Star Wars reference muttered under your breath. It always bothered me that the film makers didn't bother to google that first

[@anononomous]

Count the rings?

[@janwijbrand]

A Tuesday feels about right for a universe to be born on.

[@NotHPotter]

I think this is the most beautifully succinct video you've ever made.

[@Pfhorrest]

Goddamn she can hand-draw nice graphs really quickly!

[@magicmel02]

Ikr! Beautiful handwriting, too!

[@KieranGarland]

Wonderful stuff. Thank you. Dr. Smethurst is the best.

[@DJFAYBAN]

march 6th is my birthday too.. gotta love Becky & Ed

[@00Skyfox]

That's funny. Back in the 90s there was an episode of Animanaics featuring Death. He said something about the beginning of time. The Warners asked him when that was. He said, "I think it was a Tuesday. Very few people know that."

[@richardfrieman]

At 2:43, the professor mentions that white dwarf stars are a remnant of a "regular supernova." My understanding was that white dwarfs are the end product of stars too small to initiate a supernova. Have I been wrong my whole life?

[@ChenfengBao]

Probably a mistake on her part. Supernovae leave behind neutron stars or black holes. If any white dwarfs can be produced from supernovae, they must so rare that no references I've looked up ever mention them.

[@shtomer]

You are very much correct, Richardfrieman.

[@usadefcon1]

Her handwriting is so perfect it's distracting... in a good way.

[@yvesnyfelerph.d.8297]

If you call that perfect...whatever

[@Ohenry92]

COPELAND! You're why I keep returning

[@gaprilis]

7:21 Dr Smethurst turning Monica from Friends there for a second

[@NebRetalsJr]

gaprilis “I know!” lol

[@JaseCurtis]

Never could get the hang of Tuesdays...

[@PhysicsPolice]

3:30 No, type 1a supernova involve white dwarf stars [1]. These objects are the end result of stars like our sun which end their lives *too small* to go supernova. Only with the added mass from a companion star do they go supernova. This happens once. Not twice. 1. en.wikipedia.org/wiki/Type_Ia_supernova 2. en.wikipedia.org/wiki/White_dwarf

[@jeanbigboute]

I rewatched that bit 5 times before looking at the comments and wondered how that got past Prof. Merrifield. I thought he'd peer review these videos!

[@chillphil967]

PhysicsPolice happy someone else caught it!

[@TheBijatch]

Was looking for this. Sounded kinda weird at first, when I watched the video, but then I double checked wikipedia and my instinct was correct

[@mrspidey80]

Yeah that weirded me out as well.

[@wilkatis]

That awkward moment when universe doesn't start on a Monday, 1st January :D

[@SorenVemmelund]

So Tuesday really IS the first day of the week. I'd be darned to have gone to work on all these dreadful Mondays my entire life then!

[@ProfRonconi]

I so enjoy these videos. All of them, but particularly those that feature Dr Smethurst or Prof Copeland, because they gently lead me to the edge of the bottomless pit of my ignorance (I know, I'm a masochist).

[@SolarMoth]

its amazing that people have figured this stuff out!

[@dxutube]

Possibly your best video. Well done all in producing it :).

[@IamGrimalkin]

One interesting idea is the possibility of finding optical counterparts for black hole mergers. If they could be found, I would think the number of "standard siren" data points would go up by quite a lot.

[@Mernom]

Unfortunately no such things are likely to exist for black holes. They can even swallow their own Supernova during birth.

[@dr.spectre9697]

we need WAY more sixty symbols videos

[@gorillaguerillaDK]

I've always been told, if you're going to start something new - always do it on a Tuesday..?

[@dungbeetlemovies]

Well worth all the effort to finally discover the day of the week the universe was born on! :D

[@Ojisan642]

Professor Copeland should do audiobooks of children’s bedtime stories.

[@FATFILMSABLE]

COPELAND FINALLY! :D

[@Aceshifter]

It was a wednesday my dudes

[@Rekko82]

It was Sunday, it is in the Bible!

[@ragnkja]

I suspect the Universe predates our calendar 😉

[@LeonelMendesCogita]

Your name is cobalt, you have a pic of dan for your profile, and you frog memed this! Congrats!

[@philipcain5093]

Cobalt blue f

[@1224chrisng]

EXPLOSION WEDNESDAY

[@Jasruler]

Please make a tshirt with Dr. Smethurst’s handwriting in the design. It’s very readable yet unique.

[@wynautvideos4263]

U really need to one day say all of your channels!! Seriously! That's like 6 channels!

[@torch_k8110]

Happy birthday Prof. Copeland!

[@TimothyWhiteheadzm]

Please do a video on what the big bang was and show it to your animator so that he stops representing the big bang as an explosion in space. It was not. And that is one of the biggest prevailing misconceptions in astronomy.

[@doodelay]

She's great

[@nickwoo2]

whoa watch out here come the young eathers

[@henrikwannheden7114]

Hahahaha The Imperial Probe Droid was unexpected, but appreciated.

[@kcwidman]

2:46 Are white dwarfs remnants of supernovas? I’m pretty sure white dwarfs come from the out layers of the star slowly evaporating (for lack of a better term) over a long period of time.

[@lowlize]

You're correct, white dwarfs are not the result of supernovas. It's strange because she even confirms her mistake later, when she talks about 2 supernovas being involved (3:36).

[@AsifMehedi]

Dr Smethurst is so lovely and smart.

[@PTNLemay]

Imagine if we get it so precise one day that we could give a real "year one" and have the date marked as the exact number of years since then. True universal time.

[@8BitThoughts]

Dr Becky is the best

[@odonflanagan9219]

I think it's interesting to see the enthusiasm of the younger astrophyisist compared with the conservatism of the older physicist.

[@jondreauxlaing]

I did the math too, and I got Friday, November 13th at 2:19pm EST. I know the error bars are such that one can't really get that exact, but it was fun anyway. For anyone else that wants to do this, the LIGO detection was August 17th, 2017 8:41am ET

[@FutureChaosTV]

Yeah, but you forgot to incorporate that our calendar system changed several times in the last few thousand years ;-)

[@jondreauxlaing]

Yeah, I figured people would forgive me, since back then, only the space lizards had calendars, and their language requires two throats and an extensive knowledge of holographic theory.

[@AlexCFaulkner]

Love your space videos so much

[@CharlesTheClumsy]

Makes me a bit sad how little I know about the math of astrophysics.

[@agent475816]

Charlie Clumsy You can learn almost everything on youtube.

[@anticorncob6]

This is the only science channel that can make these kinds of videos without there being arguments about religion in the comments.

[@cabbageman]

this was great, love the depth and fun

[@mvicenzi]

There is also a third way to measure Hubble's constant by analysing the light coming from distant quasars subjected to a strong gravitational lensing. The project is literally called "H0LiCOW" (H0 Lenses in COSMOGRAIL’s Wellspring).

[@Mycobob]

I ❤️ Dr Becky!

[@wierdalien1]

Eds back!

[@MateusHokari]

This was a really great video!

[@vermashwetank]

Dr Becky's voice reminds me of Arya stark (Maise Williams)

[@mugrug12]

shwetank verma they're both from New Jersey

[@jefflucas_life]

So perfect, Tuesday.

Good to see prof. Copeland :)

[@russellcannon9194]

The last bit was really funny. Kudos. Cheers, Russ

[@PicaMula]

My two preferred Professors on a video!! Its it my birthday? XD

[@jwarmstrong]

As far as we can see gives us a number but tomorrow who knows - a hundred years ago we thought the milky way was all of space. Plus are we so lucky to be in the middle of the universe that the outer rim is easy to find.

[@mymicrowave]

Another humbling video. Thank you for this information.

[@Querent2000]

Thanks. That was a lot more comprehensible than a video on a similar topic that I just watched. I would still like to have all the assumptions involved explained, though, such as that business about the "standard candles". You say something like, "We know how bright they should be." You don't say HOW "we" know that.

[@phsopher]

Not very tactful, trying to find out the exact age of the universe. It doesn't look a day older than 9 billion as far as I'm concerned.

[@SorenVemmelund]

LOL :-D

[@NerdGlassGamingPA]

I love how they pronounce " xxxx - ation " words :D the whole team sounds wonderful. I sometimes show some part of videos such as these to teach my kids about different accents :D

[@wokeupinapanic]

Oooooh, happy birthday, professor!!!

[@tomasbeno4213]

Tuesday it is!! ... or was :) [great vid, thank you, Becky's cute as ever]

[@twothreebravo]

Well now we need to fix all the Calendars, the week now starts on Tuesday and not Sunday.

[@davidwilkie9551]

This particular discussion is about WYSIWYG and the Measurement of AM-FM time-timing modulation sync-duration integration.., ie quantization identification of holography and logarithmic condensation. Shining Laser Light on a Diffraction Photo or Grating is the best way to recognise temporal-spacing singularity positioning coordination in Perspective, the mental gymnastics involves visualisation of pure-math probabilistic relative-timing in which we are embedded, and nothing else. The Laws of Mathematics indicate the absolute fact of Infinity/Eternity Singularity Reciproction-recirculation distributed by e-Pi-i interference positioning ->holographic point projected pixel of ONE-INFINITY. Visualisation is difficult, putting it in words that someone with a mind already "full" of integrated knowledge can make sense of.. This is why "you have to think for yourself". Shortcuts like popping a pill or memorised mythological narratives are likely to end up in fantasy land.

[@ericsbuds]

fantastic video. one of the best ive seen.

[@Rando_Shyte]

She's pretty :) And smart. Also Dr Copeland is so adorable

[@WilliamAndrews0]

combine that calculation with the calendar-algorithm that tom scott talked about on computerphile. Maybe someone will call and say "But 4 billion years ago, we skipped 2 days"

[@tonyziz]

Quality content as always my man keep it up

[@vartriiness]

Imperial probe droid sound, nice.

[@1_2_die2]

Thank you a billion times for this great channel (and the others too). Big Bang... on a tuesday... damn, I would have bet on a Friday.

[@antoineroquentin2297]

Well, at what time happened the big bang? I hope not too early in the morning, I'm more of an evening person.

[@MOSMASTERING]

4:42am I slept through it and woke up just in time for the creation of the moon.

[@nahumnehemia]

If H0 is constant ("Hubble constant"), 1/H0 is also constant. So, according to this video, the age of the universe will remain the same forever! Some explanation is needed.

[@RaoulAdi]

They also mentioned that H0 changes in time. They have this habit of calling "constants" things that are almost constants.

[@Raisonbran648]

Great video, good job everyone.

[@edibleapeman2]

I'm just gonna say it: if you call-out Star Wars for using the term parsec inaccurately, you shouldn't be allowed to use its sound effects.

[@ChenfengBao]

Why not? We can't call out its faults while appreciating its other aspects or even as a whole?

[@strangequark420]

Man, thanks ... I couldn't place that sound at first, thinking maybe it was from Alien. But it's the Probot, isn't it?

[@OrcinusDrake]

edibleapeman It's a joke. Nobody thinks Star Wars is intended to be an accurate rendition of the real world

[@dedribacell]

Universe blowin up "On a Tuesday"!

[@calvingao1987]

I understand the units work out. Can someone explain to me why the inverse of the Hubble constant is the age of the universe?