Universe Today Podcast

BONUS PART STARTS AT 20:51
Watch here (with no ads) or on YouTube: https://youtu.be/QD5sJ636wxM
More interviews: https://www.patreon.com/collection/44300/
🟣 Guest: Dr. Sanjoy Som https://www.bluemarblespace.org/
📜 Multistage Rocket Optimization, Geophysics, and the Spacefaring Envelope of Habitable Super-Earths https://arxiv.org/abs/2607.02691
Rockets fight against gravity to help us as a civilization escape into space. But what if a planet is much heavier? How big and dense does it need to get before a civilization gets permanently trapped and can't go to space?
00:00 Intro

01:16 Escaping the gravity well

06:53 Limiting factors

09:47 Rockets

15:18 Can a civilizations get trapped

20:51 Geology-driven civilization

32:54 Current obsessions

39:11 Final thoughts

BONUS QUESTION STARTS AT 21:21
Watch the video here (with no ads) or on YouTube: https://youtu.be/xrMsuZTdfAM
Couldn’t we use the entire moon as a data center? Does the vastness of space ever scare me? Do solar systems have Lagrange points? And in Q&A+, will we ever get to a Jetsons reality?
00:00 Intro

00:23 [@rwarren58] Couldn’t we use the entire moon as a data center?

03:58 [@jonathanchamberlain6260] Is the vastness of space and the unknown nature ever unnerving for you. I love space content but sometimes it gives me major anxiety.

11:16 [@ashstar42] How do you stay motivated when the world seems to be turning its back on progress?

20:04 [@DamingoFlave] Do Solar Systems have Lagrange points?

21:21 [@Stanton415] How quickly do you believe the robots will be able to give us Jetsons reality?

25:04 Final thoughts

BONUS STORY STARTS AT 26:33
Watch here (with no ads) or on YouTube: https://youtu.be/ccPtQeURDzM
🔵 Vote for the best story here: https://www.youtube.com/@frasercain/posts
Interview with Vasiliy Kokorev about Little Red Dots https://youtu.be/zoHtCmCbcEU
Interview with Nobel Prize Winner Adam Riess about JWST https://youtu.be/hmJOz9qCk0M
Interview with Lee Feinberg about HWO and LIFE Telescopes https://youtu.be/0R3ykUkxH5M
We have more pictures of the Falcon 9 crater on the moon. Starship arrives at port after landing in the ocean. The Link mission to save Swift has failed. Another reusable Chinese rocket lands. And in Space Bites Plus, a really clever way to redirect an asteroid with a nuclear weapon.
00:00 Intro

00:37 The Falcon Crater https://science.nasa.gov/solar-system/moon/nasas-lro-images-falcon-9-crater-on-moon-learns-new-details/

03:08 Starship Arrives to a Port https://arstechnica.com/space/2026/08/its-christmastime-at-spacex-as-company-salvages-starship-from-indian-ocean/

05:33 Mars' Field of Polygons https://www.universetoday.com/articles/mars-curiosity-rover-discovers-massive-field-of-polygons

07:41 Link Failed. Swift Will Die Soon https://www.nasa.gov/news-release/nasa-updates-next-steps-for-commercial-swift-boost-mission/

08:59 China Lands A Rocket (Again) https://arstechnica.com/space/2026/08/the-floodgates-are-open-after-another-chinese-company-lands-a-reusable-rocket/

10:41 Fastest Star In The Milky Way https://www.universetoday.com/articles/the-fastest-star-in-the-milky-way-will-test-relativity

13:21 LRD = Black Hole Star? https://www.universetoday.com/articles/the-jwst-little-red-dots-could-be-black-hole-stars

15:47 Early Galaxies Are Bigger Than We Thought https://www.universetoday.com/articles/whoa-the-jwsts-ancient-galaxies-are-much-more-massive-than-thought

17:56 Three Supermassive Black Holes https://www.universetoday.com/articles/another-first-for-the-jwst-it-detects-three-supermassive-black-holes-in-the-same-galaxy

19:20 JWST Looks at Callisto https://www.universetoday.com/articles/jwst-peeks-at-callistos-ancient-scars

20:49 Vote results

21:45 Star Formation is Slowing Down in the Andromeda Galaxy https://www.universetoday.com/articles/hubble-reveals-that-star-formation-is-slowing-down-in-the-andromeda-galaxy

23:35 Helix Nebula https://www.universetoday.com/articles/mothra-shows-us-a-star-being-recycled-in-the-helix-nebula

24:38 Carina Nebula https://www.universetoday.com/articles/webb-captures-the-treasure-chest-at-the-heart-of-the-carina-nebula

25:49 Lion Nebula https://www.universetoday.com/articles/webb-captures-clearest-image-yet-of-the-lion-nebula

26:33 Bonus story https://www.universetoday.com/articles/nuking-an-asteroid-on-short-notice-could-save-us

30:31 Final thoughts

BONUS QUESTION STARTS AT 14:13
Watch the video here (with no ads) or on YouTube: https://youtu.be/aX16AFy_Y9Q
Do we go through same places in the Milky Way every rotation? How should we celebrate the first contact? Will artificial magnetosphere help creating an atmosphere on Mars? And in Q&A+, how much does YouTube really pay for views.
00:00 Intro

00:27 [@JamesMcIntosh-r7j] Will an artificial magnetosphere help retain Mars' atmosphere?

03:36 [@1000dots] Wouldn't that cut off heat and light from the sun too?

04:20 [@emilianolaneri] Does the Earth always follow the same path through on the milky way?

07:07 [@sciencecompliance235] How should we celebrate the first contact?

11:16 [@drewd2] How old is the Universe if you include pre-big bang?

14:13 [@JohnnyApplleseed] How much does 3M views pay?

15:55 Final thoughts

BONUS QUESTION STARTS AT 12:48
Watch the video here (with no ads) or on YouTube: https://youtu.be/R8_XwBxWsn0
How dangerous would a massive solar storm be for future Moon and Mars bases? Can more exoplanet discoveries stimulate more funding? What’s the ultimate fate of galaxy clusters? And in Q&A+, would I go on a Moon voyage?
00:00 Intro

00:27 [@slowboyfuelpump5438] how devastating would a Kerrington event be to our plans for the Moon and Mars?

03:07 [@thomasstarkey8238] If we had more Earth 2.0 candidates, would governments increase astronomy funding?

05:28 [@ragetail3] @frasercain when they say the farthest galaxy we can see is 13 billion light years away, and they say it is basically right after the big bang. What would Earth 4 billion years ago have seen there?

08:18 [@MikeKalil-e4f] How did we get here before the light reached us here?

10:11 [@OneOfAMineRocks] What does dark energy imply for the gravity-bound galaxies?

12:48 [@iliketurtles7947] Would I be willing to live on a lunar base for some years?

16:49 Upcoming Nancy Grace Roman launch