Into the Impossible With Brian Keating
Science:Natural Sciences
Recently, Bergner and Seligman explained the behavior of the first interstellar object, ‘Oumuamua, as a rare form of a quite common object, a comet. They claim it "began as an icy planetesimal that was irradiated at low temperatures by cosmic rays during its interstellar journey, and experienced warming during its passage through the Solar System. This explanation is supported by a large body of experimental work."
But Avi Loeb disagrees: “In a new paper published recently in Nature -- https://www.nature.com/articles/s41586-022-05687-w Acceleration of 1I/‘Oumuamua from radiolytically produced H2 in H2O ice -- Jennifer Bergner and Darryl Seligman suggest that the peculiar acceleration observed by the first known interstellar object `Oumuamua, can be explained if `Oumuamua was made of water ice which was partly dissociated into hydrogen by cosmic-rays along its interstellar journey. In the abstract of the paper, the authors admit that past models involving a pure hydrogen iceberg or a pure nitrogen iceberg do not work due to theoretical or observational inconsistencies. In fact, the hydrogen iceberg model was proposed in a previous 2020 paper by Darryl Seligman himself. A few months later, Avi wrote a paper with Thiem Hoang, showing that heating by interstellar starlight would destroy hydrogen icebergs too quickly and not allow them to reach the solar system from their likely formation sites of giant molecular clouds.
https://www.nature.com/articles/s41586-022-05687-w
Read Hoang and Loeb's response paper:
https://lweb.cfa.harvard.edu/~loeb/Hoang_Loeb_23.pdf
Learn more about your ad choices. Visit megaphone.fm/adchoices
Many Worlds & the Multiverse: Andy Friedman, David Brin (#263)
Neil Turok: Most Theorists are WRONG! (#262)
The State of The Universe With Eric Weinstein (#261)
Did the Big Bang Happen? Brian Keating on The Morning Wire (#260)
Sean Carroll’s Biggest Ideas (#259)
Proving the Big Bang Happened with Dr Brian Keating on The Fraser Cain Show (#258)
Brian Keating on the Abhijit Chavda Podcast: Big Bang Theory, Alien Life, Cosmology, and the Nobel Prize (#257)
Nick Bostrom: Superintelligence (#256)
Errors in the Big Bang Never Happened (#255)
Into The Impossible: Unleash Your Curiosity (#254)
Dark Matter Doesn't Exist? With Mordehai "Moti" Milgrom (#253)
Claim: The Big Bang NEVER Happened? (#252)
This Proves the Big Bang Happened: 30 Minute Thesis (#251)
The Milky Way: An Autobiography with Dr. Moiya McTier (#250)
Sabine Hossenfelder Gets Existential Without the Gobbledygook(#249)
Part 2: Sir Roger Penrose & Stuart Hameroff: What is Consciousness? (#248)
Part 1: Sir Roger Penrose & Stuart Hameroff: What is Consciousness? (#247)
If You Believe In God, Do This! A Conversation with Dennis Prager (#246)
Part 2 of 2: Quantum Physics and The End of Reality with Sabine Hossenfelder, Carlo Rovelli, and Eric Weinstein hosted by Brian Keating for the Institute for Art and Ideas (#245)
Part 1 of 2: Quantum Physics and The End of Reality with Sabine Hossenfelder, Carlo Rovelli, and Eric Weinstein hosted by Brian Keating for the Institute for Art and Ideas (#244)
Create your
podcast in
minutes
It is Free
Sasquatch Chronicles
The Confessionals
Radiolab
Sasquatch Odyssey
Science Friday