Why is There Plutonium in This Star? Przybylski’s Star with David Kipping

Is HD 101065 or Przybylski’s Star salted with Plutonium?
David Kipping of Cool Worlds lab joins John Michael Godier to discuss the search for exomoons and technosignatures.
Science is full of mysteries, and in astronomy, new mysteries are to be expected. Many get solved, many remain open. But sometimes in the history of astronomy mysteries can go unsolved for so long that they fall into obscurity, even if the implications of what might be happening are profound. One such example is known as Pryzbylski’s star, which first came to my attention half a decade ago.
In 1961, Polish-Australian astronomy Antoni Przybylsky found star that had a very strange spectrum that he thought was very low in iron and nickel, very common metals in the universe, but very high levels of strontium, holmium, yttrium and a number of other rare elements. Since, the iron levels of the star have been found to be low, but not that low. But the presence of the strange elements in this star has only deepened in that work from five years ago hinted at the presence of transuranic elements in the star, which actually puts it on the table as a candidate for a technosignature if those elements are indeed present.
My guest and I have been trying to draw attention to this star with our youtube channels in hopes of encouraging further work into this star. If those elements are present, then whatever is causing them does not seem to be found anywhere else in nature, and may involve cutting edge science in either the formation of elements heavier than plutonium in a star, the island of stability concept in nuclear physics, and the potential for a detection of an alien civilization.
David Kipping links: / @coolworldslab
/ @ucjanyx_ylbqabijy2yusbaq
/ @coolworldspodcast
KZbin Membership: / @eventhorizonshow
Podcast: anchor.fm/john-michael-godier...
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FOOTAGE:
NASA
ESA/Hubble
ESO - M.Kornmesser
ESO - L.Calcada
ESO - Jose Francisco Salgado (josefrancisco.org)
NAOJ
University of Warwick
Goddard Visualization Studio
Langley Research Center
Pixabay

[@avaruusmuukalainen]

Kipping, Godier and Przybylski. This gonna rock!

[@ryanb9749]

I watched the cool worlds video last week.

[@ryanb9749]

You could say, this star is twisted, sister.

[@vapormissile]

​@@ryanb9749I want a rock.

[@user-mc6lv7mu9p]

Kipping and Godier ='s verbal opium lol

[@talkingmudcrab718]

Sounds like a really wild 70's Prog Rock band 😂

[@stricknine6130]

Dr. Kipping is by far one of the best guests you have on the show. Thanks for a fantastic interview!

[@Ken-fh4jc]

Always a treat when my two favorite science KZbinrs team up.

[@zampination]

Wow! The two most soothing sleepy voices on KZbin come together! I am definitely watching this episode at least 30 times till i reach the end after that much good night sleep! Thanks John and David for offering us the resting sleep we need on difficult and hard days of work.

[@potato-ld1uj]

Same my friend lmao, same!

[@tehphoebus]

So nice to see others also find solace in listening about space and science to recharge and ease into slumber; as I do.

[@cabanford]

Add in "The Entire History of the Universe" for the ultimate listening session ❤❤❤

[@zampination]

@@cabanford Will do! Thanks for the heads up

[@imacmill]

I'm not sure it's complimentary to say that these two people put you to sleep.

[@chiroptile2881]

Heh.. I fired this up in hopes of inviting some sleep into my life, but I have to say.. I am wide awake hanging on to every word.. Going to save the rest of this cast for tomorrow. Congratulations, Dr. Kipping on snagging JWST! And thank you, Mr. Godier for what you do.. Good night, folks!

[@EventHorizonShow]

Wonderful!

[@cedrichunter9759]

Artificial radiation signatures emitting from a natural structure?!? Sounds like an alien techno signature to me. 370 light years away though, that's far.

[@monsG165]

Ever since you mentioned Przybylski star on your JMG channel I’ve obsessed over finding more information about it, and I couldn’t find anything that was recently published. Glad that it finally getting a deep dive interview on EH! Godtier!

[@potato-ld1uj]

Man when my favorite KZbin creators collaborate like David kipping & J.M.G. I'm in heaven, straight gold, I love it.!. Lmao & I haven't even started the episode yet, I'm just that excited.

[@EventHorizonShow]

And it’s over an hour!

[@potato-ld1uj]

I know.!. I'm mad excited, about to dive into it right now, & Honestly good sir, I'd just like thank you for your content, it truly brings joy to my day getting to listen to you.

[@dmeemd7787]

Yeahhh.. I clicked on this IMMEDIATELY and stopped what I was doing. LoL Awesome 🤙

[@EventHorizonShow]

Hope you enjoyed it!

[@pauliussmirnovas6210]

Hope you aren't a pilot..

[@dmeemd7787]

@@pauliussmirnovas6210hahahaha 🤣 👌

[@dmeemd7787]

@@EventHorizonShowincredibly good, thank you!!

[@peacepoet1947]

O​@@EventHorizonShow be a fan of both of you and many other creative artists, scientists, doctors, rebuilders of engines, and structures. KZbin has a lot to offer the mind.

[@EpicFail1945]

Whenever I see a David and John interview i know its gonna be a good one. Literally my 2 favorite science based KZbin creators.

[@dexraikkonen7]

Good God, I'm such an idiot; I started listening and was like: "hmm, that voice is familiar"... until John mentioned the Cool Worlds channel (which is phenomenal) my dumb brain made the connection.

[@RussTrotter]

we're so lucky the some of the most proliferic astro-creators are good buds as well and show up on the other's vids. Great episode JMG!

[@garyr3179]

So delighted to hear Dr. Kipping on Event Horizon with John Micheal Godier! I was hooked every second of it and can't wait to hear more on his developments on exo-moon formations throughout the universe!

[@alexanderbencannon3892]

I always love it when you have David on John....He is my favorite and the Cool Worlds channel next to yours is one of the best on KZbin period. 😊

[@Henchman314]

Godier & Kipping 🤔 Sounds like co-authors to an up coming paper 😁 Love the episode ‼️

[@mr.lumbergh]

JMG AND David Kipping? Absolutely love it.

[@angelosasso1653]

I talked with a Physicist about this star and he just said: I am sure a lot of people look into this! But apparently not a lot of people actually do. If the measurements are correct however, this might be one of the best chances to look at the island of stability and other weird phenomena in heavy elements. I have no academic background in astronomy but I strongly assume something wrong with the measurements itself but if the measurements are correct I´d assume something like a micro black hole or a neutron-star like object to be inside it potentially it just got caught or something. But nevertheless it´s one of the most interesting objects I came across so far. The channel might really have an impact on the scientific work on this anomally.

[@chrissyre89]

Great Episode! This could only be topped by having JMG, David Kipping and Matt O'Dowd together

[@jasonmilldrum]

I think Kipping's approach of 'forced agnosticism' is the correct one. I'm glad he touched on scientific epistemology. I don't think that is considered nearly enough in our public debates.

[@mrrob7531]

A video with JMG and David Kipping…yes please. I follow both people so tonight I get to listen to both at once.

[@gravecac9522]

This content is why I subscribe to this channel. Good stuff!

[@swissbiggy]

Cool Event Horizon Worlds , the best possible combination❣💯👌Thank you very much gentlemen.... Together with Anton Petrov you are my favourite KZbinrs to watch and listen.

[@iverstim]

Yeah, these guys are first class

[@jaivan30]

Same

[@diamondvideos1061]

Add Isaac to that list for me!

[@GrandpasPlace]

The low absorption of green light (500-600 nm) is due to the plants optimizing for both blue (400-500 nm) and red light (600-700 nm). Peak absorption of light is a curve within the blue and red spectrum making the low point of the absorption curve green.

[@BlinkRazor]

John and David… what a treat 🥰

[@tehphoebus]

So very happy that you both are collaborating and bringing attention to this. This really feels like the next big step after looking for exoplanets.

[@limabravo6065]

I used to work for Sandia and ive felt the warmth of plutoniums nuclear decay through my PPE and down to my skin. theres a movie where a rogue russian scientist takes a hydrogen bomb apart so a terrorist can use the fission trigger aka a Nagasaki style bomb. When he has the h bomb torn down to where he can access the physics package he just reaches in and grabs a softball sized chunk of plutonium and remarks on its warmth and i had to laugh when i saw that movie again, ahhh i hate knowing how the sausage is made sometimes. Anywho, yeah heavy unstable transuranics in a star makes no sense to me. If it were a natural phenomenon then that star has got to be churning out lots of plutonium, and if someone is dumping plutonium into the star then they must have mountain ranges worth of it and the other transuranics. So if those elements are present then that star needs to be under constant observation

[@kevinsayes]

Nice just in time for evening walk. Thanks JMG and Dr Kipping

[@ninjalanternshark1508]

Two of my favorite chill voices discussing super interesting content. This is bedtime gold.

[@drivinginluton5745]

Dr Kipping : I'll ask the internet what to call exomoons. The Internet : Moony McMoon Face.

[@ryanb9749]

You forgot 420 and 69.

[@InuranusBrokoff]

​@@ryanb9749Underrated. No metric to measure it by. Just completely and in all ways underrated...

[@EventHorizonShow]

Moon moons.

[@Xsiondu]

@@ryanb9749 Nice!!

[@hollycook1419]

It's a great day when two of my favorite science youtubers talk to each other! Especially on Przybylski's star!

[@justsmashing4628]

One of the absolute best channels on KZbin

[@BRUXXUS]

How exciting! I hadn't heard Dr Kipping and team finally got accepted to use JWST! Congrats! As always, hearing both of you discuss these things is always such a treat. :)

[@droneee3478]

Oh man you guys, Issac Arthur and Fraiser Cain are the best on the Tube. Keep up good work gentlemen.

[@potato-ld1uj]

Issac Arthur is the man! I don't know who's episode will be better with j.m.g. Arthur or kipping, I haven't watched this episode yet but I'm about to find out.

[@maneatingduck]

Fantastic interview, thanks to both JMG and Dr. Kipping :)

[@xanderunderwoods3363]

Omg DAVID KIPPING!! This is sooooooo awesome having him on here!! This is soooooo cool!! Also this star does indeed look as though it is a technosignature

[@EventHorizonShow]

Here’s more episodes with Prof. Kipping. kzbin.info/www/bejne/gp69i2WqYrSAh7Msi=ioanrQgInHRV3Ksp kzbin.info/www/bejne/d3SQZ6KhhLyLgtUsi=Li6WS00xxtZEeZk4 kzbin.info/www/bejne/q4q7eWeofZaGra8si=HtUaYOGOTKY1Whvm kzbin.info/www/bejne/hZu7f2CJoq2peZIsi=gjRxbikLJDrBiasN

[@FesteringGhoul]

JMG. I freakin love you, dude. Everything you say melts my heart. You make such a noticeable effort to remain agnostic on literally every front. I really appreciate the way your brain works. Keep up the great work.

[@damianp7313]

You got me hooked on cool worlds im glad john did a followup video

[@disasterarea9341]

always a pleasure when you have Dr. Kipping on the podcast

[@OminousToast]

Could listen to you and Kipping all day, absolutely love it!! Cheers

[@cabanford]

Two of the best voices in Astrophysics ❤

[@liberteus]

Coming to videos i haven't seen yet. Each is a treat of its own, waiting to be discovered. I love all of them. Thanks jmg.

[@carterpochynok4874]

My two favorite space KZbinrs talking about my favorite star. It's a good day!!

[@robbabcock_]

What a fantastic interview! Thanks to you both.

[@mialotusmusic]

Two of my favorites! I'm so happy that David's team got time of JWST! That will be so exciting to keep up with the updates! ❤ love you guys!❤

[@usnairframer]

I've been really hoping to get a video on this star. Super exciting!

[@jakez5894]

Ooo oo I know an answer to this one! I read a cool paper once postulating that plants don't absorb green light because the intensity of green light varies throughout the day with solar intensity, causing spikes of energy that are too much for the plants to absorb and troughs where there's not enough green light to absorb. Instead, plants target blue and red light, the intensity of which --- when added together -- stays remarkably constant throughout the day (red light in the early/late day and blue light predominating in the middle). This gives the plant a very stable energy source. This might be more valuable than fully taking advantage of the peak intensities of your star.

[@MagnusQuake]

Thank you kindly for this ya Champion!

[@MCsCreations]

Another fantastic interview, John! 😃 Dr. Kipping is great! About that star, if that's a technosignal, I know exactly what it means: stay away! 😬 Anyway, stay safe there with your family! 🖖😊

[@u.v.s.5583]

Actually, it is the hugest display window they could make. It says, Cheapest high quality Plutonium in galaxy! Do not seek any further, fly right to us!

[@MCsCreations]

@@u.v.s.5583 Makes sense as well... 🤔

[@ryang.5094]

Excited for this one!

[@gw1890]

Two of the best youtubers at the same time in the same place. Turns out to be a good combo.

[@GeoffsCornerOffice]

Two of my favorite people on KZbin!! Awesome!

[@pinky8167]

You guys should definitely do more videos together, great synergy and perfect voies and knowledge for so much science content.

[@TheShadowinflight]

Great show John!!

[@Erikaaaaaaaaaaaaa]

Really loved this podcast. Not sure how I feel about that last bit though. I really like and admire David's usual stance about being agnostic. It feels really really presumptuous to declare that the universe is likely devoid of intelligent life because it seems like it isn't full of it. It's a very extreme and large conclusion to arrive at based on something completely un-empirical (The thought experiment about chemistry). Because as David says just before that, once you develop a prior you also develop confirmation bias for that prior.

[@Violence0vAction]

thanks so much gents… great talk 🤙🏼

[@krishead2410]

Did we ever figure out what's going on with Tabby's star? JWST needs to look at these two stars ASAP.

[@EShirako]

We're not 100% sure on a SPECIFIC cause for the dimming, but AFAIK the dimming has by now generally been agreed to seem to be dust-based dimming, like that it has a partial dust-cloud around it that occludes the star to various degrees. The visual signal faded much more than its IR signature, as I recall, and we have other stars with similar 'less visual but not-so-less IR fading' behavior that we're pretty sure on the source of. So we're not SURE on what exactly it is, but I think only the nutjobs are still hoping it's an uneven Dyson sphere. The leading theory is a partial planetary dust cloud or the like. So it's still a bit of a mystery, but only in details, not in "Are there aliens there or not?!" Ah, in fact, right from the Wikipedia page, "The latest results have ruled out explanations involving only opaque objects such as stars, planets, swarms of asteroids, or alien megastructures." The only big confusion about 'planetary dust cloud' would be that the star is a 'normal F-type' of adequate age as to no longer have a proto-planetary disk, so if there is dust, we aren't sure WHY there might be, even though we seem to think it to be the best candidate for 'what could cause the observed dimming'. There is no 'protoplanetary disk', but we think the proto-disk option is the best fit answer for what we observe...confusion! Maybe a planet broke up somehow, who knows. So the mystery of Tabby's Star is much REDUCED, but not totally ended yet.

[@atashgallagher5139]

I've known about the island of stability for years but recently also heard about the potential continent of stability, which would be even more interesting. Wonder what the spectral signature of that stuff would be.

[@GizzyDillespee]

Hey thanks, in the 1st 10 minutes you answered my questions about how feasible it is to see what types of exomoons and where. That's great.

[@StrokeMyLovePump]

David is the best. I watch everything he's got his got his hands in.

[@amangogna68]

Great video and information !

[@Seafaringslinky]

I would totally like to crowd fund a telescope that just looks at these wonky stars all the time. Lets figure out what these fellas are up to!

[@robertlussier2944]

Anton Petrov has a pretty interesting KZbin channel called "What da math?" He did a video about Przybylski's star about 2 months ago.

[@EventHorizonShow]

He’s a wonderful person.

[@t.gadway6729]

As for green stars I recall that there was a story by Poul Anderson with such a sun and it was explained as happening because the emission spectrum of an object narrows as it's temperature increases. This fictional star was leaving the main sequence and heating up so the narrowed part of its spectrum happened to be passing through the green wavelengths. Whether this can work on the scale of a sun in the real world might be questionable.

[@rodneysmith1750]

My two most favorite guys, love it!

[@acidtechno]

amazing discovery ❤

[@jacksonnc8877]

Congratulations David! Such an amazing feat to get 72 hours of JWST. You're going to make history

[@beefandbarley]

That was great, thank you.

[@paultjanssen]

Stoked for Tabby star.

[@Vanotter]

Killer combo in terms of host and guest.

[@theCodyReeder]

The moon thing is very interesting. Cant wait for results!

[@AutiSam1974]

Hi John I love the artwork at one minute in, where is it from? In fact I often like the artwork you include in your videos so if you can signpost me to where I can see more that would be great! Thanks for everything you do, Samuel 😊

[@LadyBeyondTheWall]

Regarding the UAP videos and pilots stating they've seen uap whilst flying.. I disagree with Kipping's point that of course things are going to happen sometimes out of thousands and thousands of flight hours and that sometimes pilots are going to get it wrong and think they saw something anomalous when they really didn't, so that it could just be pilot error. That's not taking into account AT ALL that various pilots have said there were times they'd see these same things every single day for weeks or months. That absolutely ISN'T just thinking you saw something anomalous once out of thousands of flight hours.

[@u.v.s.5583]

I think his argument is that during one million flight hours you will definitely find an entire squad of pilots that are all sky high on extasy, mushrooms, marijuana and other illicit substances.

[@zapfanzapfan]

This will tuck me in tonight 🙂

[@puffpuffpass3214]

I was excited to watch this one

[@floridaman4073]

Two of my favorites

[@aserta]

34:58 at that level of mass, given the implication that a civilization would be dumping that material in, it's plausible or at the very least on the list. Question is... would this be... the most efficient method to signal "we're here" or would this be the most efficient means of disposal or does this serve a purpose we've yet to understand about stellar mechanics? Dunno about other people, but when you consider the "cost" and rate it over purpose, without getting into the "absurd" (read absolutes and beyond) ... it doesn't seem like something a civilization would be doing. They're not modulating it, just pumping it through, if it's a message. That leaves to be desired, as messages go, because it could be natural or someone would assume it's natural in the absence of that modulation. What's the point of disposing it into the sun? Could just as well use it for something else or just shoot it out of the system. Which leaves a mechanic we yet understand. Well, it could be anything, could be natural - could be something they're doing to alter (somehow - for some purpose) what the star does. Which is a bit beyond my pay grade. So IMO, plausible, but only by skin of it. A hair away from being nothing at all and just a peculiarity we don't comprehend. Be it at the user end or at that end.

[@NullHand]

Or are we being way to narcissistic here in assuming this is an attempt to signal us? Maybe this is merely what Kardashev 2 industry looks like when a civ gets around to star lifting and nucleosynthesis?😊

[@olencone4005]

To me, it seems most likely that it's simply a natural process that we either lack the instrument fidelity to properly observe and identify or one that we are just unfamiliar with. In the 19th century, astronomers believed the Sun was emitting a new element, which was named "coronium" -- but it was later found that it was simply iron that was very heavily ionized. This was also the case with "nebulium," a "new" element that was found in spectroscopic observations of the Cat's Eye nebula in the late 19th century -- that turned out to just be ionized oxygen. It's very possible that what we see in Przbylski's star are simply very normal elements that are in an environment or ionized state that we are unfamiliar with.

[@EinsteinsHair]

Just going with the alien hypothesis for a moment, as I listened I was thinking that plutonium is not nuclear waste, why not use it for power generation? Perhaps an advanced civilization has fusion and doesn't need that stuff anymore. They decide it is dangerous to keep around and dispose of it in their star so no one can retrieve it. But it will probably turn out to be some rare natural explanation.

[@MadderMel]

Cool Worlds is a brilliant channel !!

[@johnkurpiewski3996]

What a trio

[@spindoctor6385]

The null result, not finding a moon might be more interesting for science, but I don't believe for a second that Dr Kipping is "hoping" for that to be the case. I have followed his channel for quite a while and his dedication and passion for finding an exo-moon only leads me to hope that his name is forever linked to the first confirmed discovery of one. It makes it even more poetic if it is found around a planet he discovered.

[@rjosprey9808]

David talks about visuals, there were also FLIR, radar and underwater sonic velocity measurements. Than questions about bodies. Nonhuman bodies were found among crashes.

[@irenafarm]

I see SV’s and citations and hit subscribe. :) Can’t wait for the science-y rabbit hole adventures you’re facilitating for me, here!

[@roachedyourmom1357]

It's wild to me that this star hasn't gotten more attention. The implications are profound. This has the potential to be one of the biggest discoveries in human history and it just goes largely ignored. Hope we can get some answers some day

[@Dragrath1]

I would note that we have evidence from sediments dated to 2.6 Ma or so that a nearby supernovae event delivered Pu 244 along with other short lived radioisotopes like Fe 60 who is to say the Plutonium didn't arrive to Przybylski’s star there in a similarly exotic event. As for Actinium that could be a decay chain intermediaries but the heavier actinides is yeah if that is real it is interesting. Was it perhaps a nearby a Kilonovae? A billion years does fit the timescale for Neutron star inspiral and this star has some weird properties so might it be possible we just have to be cosmically speaking relatively recent enough for these heavy elements to still be there. What do we know about Przybylski’s star's orbital dynamics? From what I looked at this star is around 1.5 solar masses and we haven't found a companion via radial velocity but that doesn't restrict massive companions if aligned with the plane of the system relative to us. The strong magnetism of Ap stars is interesting and given what we know about other classes of exotic stars stellar mergers could something similar be at play? Perhaps related to the merger scenario if the resulting debris nebulae was sucked in? Is there still nebulosity there now today? We should look for the predicted effects if there is a hidden neutron star companion or the possible black hole from two colliding neutron stars. As for the moon orientation the recent discovery that the tilt of Saturn is still increasing and ongoing tilting of Saturn caused by tidal effects of titan and the ring system receding. That was a surprising but fascinating find which adds to the case that something catastrophic must have happened there around a billion years ago or younger. From the biology perspective as I have been diving into astrobiology there seems to be work studying anaerobic photosynthetic life which has curiously found that the reason could be related to the high electronegativity. In particular aerobic photosynthesis uses water as the source of hydrogen and the needed energy to split those hydrogen atoms away from oxygen corresponds to the blue wavelengths. There was an adaptation involving at least similar types of pigments shared between aerobic photosynthetic life and green sulfur bacteria which at least in aerobic photosynthesis allows 3 red wavelength range photons to be absorbed and reprocessed as a photon of blue wavelength energy. This possibly gives a quantum mechanical limit on why plants might be green at least in part. There are reasons to doubt that is the full picture as those green sulfur bacteria have no such need to use such high energy photons and some understory plants do use green light for photosynthesis showing that it isn't impossible to use it. My suspicion is that the reason will be due to heat as chloroplasts need to be kept within a narrow window of temperatures which plants usually do via evapotranspiration. This coupled with the generally bad outcomes that occur if low light adapted plants are suddenly exposed to full sunlight suggests that it may be a case of too much activity in their photosynthetic reaction centers which would be supported by some plants algae and cyanobacteria in high intensity light conditions adopting red pigments (which people will also sometimes breed into plants too I should note). I suspect it is a combination of both of these effects base don what I have read but more research is needed and there is evidence that at least in the case of oxygenation the standard narrative is wholly insufficient. In the case of Boyajian's star perhaps the long term dimming and the possible collision were related? After all the Ordovician Meteor event was a major collision between two asteroids which created a lot of debris which may be undergoing secondary collisions during the interval of several million years where such collisions are much more likely. Dr. Kipping echoes my thoughts on UAP's from the get go though my immediate though was skeptical from the get go but I tend to be very skeptical most of the time fore this kind of stuff. Keep an open mind and be aware of possibilities but be skeptical especially with god in the gaps mechanisms as gods, aliens or fairies(which seem to have been the predecessor of UFO/alien sightings).

[@JohnMichaelGodier]

The real issue is the other transuranics above the table from plutonium. Some of them have no stable isotopes, and some have very short half-lives, I think the longest lived isotope of Einsteinium is just over a year. So whatever is going on, it's actively replenishing these elements if the observation and interpretation of the spectra are correct. So if it was a kilonova, we'd know, because it would have had to happen sometime the previous year. We'd see that. Another option is bombardment by a neutron star, but again, it would need to be active or recent, and there is no neutron star there. There are just very few possibilities for it when you account for the very short half-lives of some of these elements. That said, it really needs confirmation to ensure that these elements are really there and being interpreted correctly. That's step one. One other aspect though is that they could be decay products of more stable elements higher up the periodic table in the so called island of stability, if that exists. We've never synthesized any of that stuff, so it remains theoretical, but again it's unclear how this single star could do it, but no other star we know of does. Tabby's star is a different story of course. Yes, I think the case can be made that the long term overall dimming could be due to a dispersion effect after a collision. Consistent with this is the overall decline in the depths of the dips that have been subsequently observed. They aren't the really severe 22 percent dips anymore, more like 1-3 percent, which seems like dispersion. Trouble is, there should be infrared visible, warm dust afterall and observations didn't show that though the JWST observations might whenever they come out. So that led to the cold comets colliding hypotheses Dr. Boyajian initially advanced, but that too has issues in that the profiles do not match exocomets and it would require an implausibly huge amount of cold comets to do it. With UAP, all that's needed is some quality evidence and word of mouth accounts won't hit that bar. I simply leave it at that. I'll take a look at anything, and be open, but so far my bar hasn't been hit by anything.

[@Dragrath1]

@@JohnMichaelGodier Yeah if these more exotic transuranic elements exist in its spectrum that would change things though it might work well in the context of the so called island of stability. As for the neutron star from what I looked up in a not very comprehensive search none has been detected but there is still a possibility if it is positioned such that no radial velocity signal would be viewed from Earth that it could still be there, unlikely but not yet ruled out entirely. Wasn't there an object which is based on the idea a neutron star could sink into the interior of a star? I doubt it is the case here but something odd is going on. The other explanation for the long term dimming with Tabby's star I have heard is that there might have been a gaseous planet that crashed into the star some time ago and cause it to brighten with the star slowly relaxing to its normal brightness with the odd dipping possibly being due to now unbound icy moons slowly evaporating away. Probably unlikely but its an odd star.

[@JohnMichaelGodier]

​@@Dragrath1 There is, the neutron star engulfed in a normal star is a Thorne-Zytkow object. There are predictions about what that might do to a star, and there are candidates for it. You should see higher levels of calcium and lithium, but also elevated rubidium and molybdenum. You should also see higher than normal luminosity, which is not seen at Przybylski's star. But there are questions there, what does the spin of the neutron star do to alter the conditions etc. What's interesting about Thorne-Zytkow objects is that there's no reason they shouldn't exist physically. With Tabby's star, the intrinsic to the star explanations have fallen short. There have been several, giant star spots, recently ate a planet etc, but what should be seen in such a case is periodicity as the star rotates and whatever blemish comes into view. You'd also expect the star to act strangely, Kepler could see variability in the stars themselves and much of it was very characteristic, short upticks in luminosity due to flaring etc. and Tabby's star was just behaving like a normal F-type star. The real key is to observe the star again and confirm the presence of those elements, and then look for other examples in type Ap peculiar stars.

[@jamesmcn0000]

Heads up - you should probably run a high pass / low cut filter at 200-300 Hz on your audio.

[@jamesmurphy3810]

Dear Mr. Godier,I hope this message finds you well. My name is James Murphy, and I'm a regular listener of your "Event Horizon" podcast. I've always found the topics you cover both enlightening and engaging, which speaks volumes about the effort you put into your work.I'm reaching out to inquire about the background music used in your episodes. There's a particular piece that resonates with me, and I was hoping to learn more about it-its title, the artist, or where I might find it. Your selection enhances the ambiance of the discussions, and this piece, in particular, has caught my attention.I understand you're quite busy, and I appreciate any information you can provide, whenever it's convenient for you.Thank you for your time and for the incredible content you create. It's greatly appreciated by myself and many others.Warm regards, James Murphy

[@EventHorizonShow]

Hi James, this is Ross the producer responding. Thank you for the kind words. Do you know what time in the episode the music plays?

[@jamesmurphy3810]

It's the music that plays at the 4:30 mark

[@HaHa-gy5vg]

Wait a minute...this Rocks!! 🤟🏿

[@halilzelenka5813]

Kipping is a great guest

[@Sajuuk]

What a surprise to hear David Kipping on this channel.

[@burtbackattack]

Love Dr Kipping and his Cool Worlds channel (not as much as yours obviously! 😉) this episode is going to be awesome.

[@Jlucas4]

Thanks!

[@EventHorizonShow]

Thank you!

[@kevinsayes]

It may not be what he’d be into personally, but I think David would do well as a like Brian Cox level science communicator. Not that Cool Worlds isn’t a big channel, but giving whole tours etc. he has a calm approach and uses easy to understand yet effective example to explain concepts

[@rogerdudra178]

I sure find your discussion interesting.

[@luklopskywalk]

So good

[@sp_ce.]

Plant colors were not always green on earth, they actually at some point only absorbed green light, instead of only reflect it. Plants used to be purple before chlorophyll was used. Purple is actually often taken as a possible biosignature now.

[@leftblank6036]

I can’t believe I requested this and it was made possible , maybe just a coincidence, either way I’m very grateful ☺️

[@EventHorizonShow]

Hope you enjoyed it!

[@reallyryan_]

Glad to have DR. Kipping back I love his channel Cool Worlds 💙 you guys both do some incredible work

[@blackfish4147]

The "fine tuning" hypothesis is the best example of observational bias there is. By that thinking, the arctic is amazingly tuned to the polar bear and my local reservoir is somehow tuned to the smallmouth bass that live in it.

[@angryhedgehoglee6363]

I'm flying to Sulfur Springs, Texas, for the April eclipse this week! Near four and a half minutes of totality! This is going to be fabulous! I am incredibly excited about this! Obviously.🤯😛😜🤪😝

[@jamesvickers3266]

Well done getting that JWST time David. It's great news.

[@ardentdfender4116]

Horizontal time 🛌 listening to video while I close my eyes.

[@jofffsd]

Has SETI taken a look at the Przybylski’s Star or the system it's in?

[@AnarchoCatBoyEthan]

Very exciting, I absolutely love this star. What a weirdo. David is great too!