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

Episoder(669)

Ep. 755: Intermediate Mass Black Holes

Ep. 755: Intermediate Mass Black Holes

Astronomy Cast Ep. 755: Intermediate Mass Black Holes By Fraser Cain & Dr. Pamela Gay Streamed live on May 5, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay. There are stellar-mass and supermassiv...

12 Mai 202531min

Ep. 754: K2-18b

Ep. 754: K2-18b

Astronomy Cast Ep. 754: K2-18b By Fraser Cain & Dr. Pamela Gay Streamed live on Apr 28, 2025. You've heard the news! Astronomers are reporting the discovery of biosignatures at K2-18b. Is this proof o...

5 Mai 202532min

Ep. 753: Why is the Moon's South Pole So Interesting?

Ep. 753: Why is the Moon's South Pole So Interesting?

Astronomy Cast Ep. 753: Why is the Moon's South Pole So Interesting? By Fraser Cain & Dr. Pamela Gay Streamed live on Apr 21, 2025. I'm sure you've heard that all eyes are on the Moon's southern pole....

28 Apr 202535min

Ep. 752: Should We Go to the Moon or Mars Next?

Ep. 752: Should We Go to the Moon or Mars Next?

Astronomy Cast Ep. 752: Should We Go to the Moon or Mars Next? By Fraser Cain & Dr. Pamela Gay Streamed live on Apr 16, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay There is an ongoing debate on...

21 Apr 202536min

Ep. 751: Vacuum Energy

Ep. 751: Vacuum Energy

Astronomy Cast Ep. 751: Vacuum Energy By Fraser Cain & Dr. Pamela Gay Streamed live on Apr 7, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay. Even empty space isn't empty. It's filled with the qua...

14 Apr 202533min

Ep. 750: Supernova Early Warning System

Ep. 750: Supernova Early Warning System

Astronomy Cast Ep. 750: Supernova Early Warning System By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 31, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay When enormous stars detonate as super...

7 Apr 202526min

Ep. 749: Dark Energy Changing Over Time

Ep. 749: Dark Energy Changing Over Time

Astronomy Cast Ep. 749: Dark Energy Changing Over Time By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 24, 2025. The Hubble Tension is a vexing problem, with astronomers measuring the expansion o...

31 Mar 202532min

Ep. 748: Fast Radio Bursts

Ep. 748: Fast Radio Bursts

Astronomy Cast Ep. 748: Fast Radio Bursts By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 17, 2025. For the briefest of moments, some dead stars can flash brighter than their entire galaxy (in Ra...

24 Mar 202528min

Populært innen Vitenskap

fastlegen
rekommandert
jss
tingenes-tilstand
rss-rekommandert
liberal-halvtime
sinnsyn
forskningno
tomprat-med-gunnar-tjomlid
villmarksliv
rss-nysgjerrige-norge
fjellsportpodden
dekodet-2
kvinnehelsepodden
smart-forklart
rss-paradigmepodden
vett-og-vitenskap-med-gaute-einevoll
nevropodden
tidlose-historier
utenrikshospitalet