Ep. 775: The Hydrogen 21-cm Line
Astronomy Cast22 Dec 2025

Ep. 775: The Hydrogen 21-cm Line

Astronomy Cast Ep. 775: The Hydrogen 21-cm Line By Fraser Cain & Dr. Pamela Gay Streamed live on Dec 15, 2025. Atomic hydrogen is the raw material for stars, but there's a problem. It's cold & dark, but it can do a very rare trick, releasing a photon in a very specific wavelength, known as the 21 centimeter line. And thanks to this wavelength astronomers have mapped out star forming regions across the Milky Way, the Universe and into the Dark Ages! This forbidden transition of Hydrogen has led to the mapping of galaxy rotation, a cool classroom application of quantum mechanics, and weirdly no Nobel prize. In this episode, Fraser and Pamela take a look at this line's out-of-proportion awesomeness! This show is supported through people like you on Patreon.com/AstronomyCast In this episode, we'd like to thank: Andrew Poelstra, BogieNet, Brian Cagle, Burry Gowen, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Michael Purcell, Sergey Manouilov, Siggi Kemmler, Sérgio Sancevero

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(677)

Ep. 795: Expanse Science

Ep. 795: Expanse Science

Astronomy Cast Ep. 795: Expanse Science By Fraser Cain & Dr. Pamela Gay Streamed live on May 10, 2026. This is the final episode of our series on sci-fi universes. And this week we will tackle "The Ex...

1 Juni 32min

Ep. 794: Stargate Science

Ep. 794: Stargate Science

Astronomy Cast Ep. 794: Stargate Science By Fraser Cain & Dr. Pamela Gay Streamed live on May 10, 2026. We continue our ad-hoc miniseries through sci-fi franchises. This week we'll talk about Stargate...

18 Maj 38min

Ep. 793: Star Trek Science

Ep. 793: Star Trek Science

Astronomy Cast Ep. 793: Star Trek Science By Fraser Cain & Dr. Pamela Gay Streamed live May 4, 2026. Today we continue our mini-series; evaluating the science of various sci-fi franchises. We did Star...

11 Maj 34min

Ep. 792: Star Wars Science

Ep. 792: Star Wars Science

Astronomy Cast Ep. 792: Star Wars Science By Fraser Cain & Dr. Pamela Gay Streamed live April 29, 2026. May the fourth be with you! Isn't that what people say on the international holiday known as Sta...

4 Maj 40min

Ep. 791: Chang'e Sample Return

Ep. 791: Chang'e Sample Return

Astronomy Cast Ep. 791: Chang'e Sample Return By Fraser Cain & Dr. Pamela Gay Streamed live on Apr 20, 2026. Last week we talked about samples from other worlds delivered to Earth by meteorites. But s...

27 Apr 33min

Ep. 790: Meteorites From Other Worlds

Ep. 790: Meteorites From Other Worlds

Astronomy Cast Ep. 790: Meteorites From Other Worlds By Fraser Cain & Dr. Pamela Gay Streamed live April 17, 2026. Even though humanity has returned samples from a fraction of the worlds in the solar ...

20 Apr 33min

Ep. 789: What Happens When a Planet's Star Dies

Ep. 789: What Happens When a Planet's Star Dies

Astronomy Cast Ep. 789: What Happens When a Planet's Star Dies By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 30, 2026. A star like the Sun only lasts about 10 billion years and it becomes a red...

6 Apr 29min

Ep. 788: Life's Molecules Form in Space

Ep. 788: Life's Molecules Form in Space

Astronomy Cast Ep. 788: Life's Molecules Form in Space By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 23, 2026. The theory of evolution how life takes on its wildly different forms. But how did ...

30 Mars 32min

Populärt inom Vetenskap

dumma-manniskor
p3-dystopia
allt-du-velat-veta
kapitalet-en-podd-om-ekonomi
rss-ufobortom-rimligt-tvivel
svd-nyhetsartiklar
medicinvetarna
det-morka-psyket
rss-spraket
rss-vetenskapsradion
halsorevolutionen
dumforklarat
sexet
bildningspodden
vetenskapsradion
rss-arkeologi-historia-podden-som-graver-i-vart-kulturlandskap
rss-vetenskapsradion-2
paranormalt-med-caroline-giertz
4health-med-anna-sparre
rss-ronden