Walkabout the Galaxy
biosignatures on Venus; Europa; LIGO
Astrophysics and Astronomy | Physics
Join us for a special reunion of all the astroquarks with a fresh look at some of our favorite topics, from hunting for biosignatures on Venus and plumes on Europa to the quivering of space-time measured by LIGO. New results on old observations and quasar trivia round out our 300th episode.
Supercharge your galaxy with a quasar. Quasars are not your parents' quasi-stellar radio sources. Emitting light across the entire electromagnetic spectrum power up to 1000 time greater than the entire output of the Milky Way galaxy, a quasar is just what you need to put some pep back in to your galaxy. With a simple fuel source of gas and dust in an accretion disk around a supermassive black hole, you can keep your quasar blazing for hundreds of millions of years, and you can recharge it by arranging for a collision with another galaxy. Converting gravitational potential energy into intensely bright radiation since the universe was less than a billion years old, quasars are your tried and tested sources for every color of the rainbow and more. Quasars, where clean energy lives (Con Ed).
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; Sargeant, Hannah; Cooney, James; and Becker, Tracy, "Astroquarks 300!" (2022). Walkabout the Galaxy Podcast. 223.