Walkabout the Galaxy
extraterrestrial life; hydrogren-rich ocean worlds; hycean worlds; asteroids
Astrophysics and Astronomy | Physics
Will we find extraterrestrial life on Mars, Europa, or an exoplanet like Earth? Or will it be on an entirely different kind of planet, larger than the Earth, smaller than Neptune, and with planet enormous quantities of water? These hydrogen-rich ocean worlds, or hycean worlds, may be habitable. And to keep our own planet habitable, we may need to think about gently nudging asteroids off a collision course rather than blasting them to smithereens.
Einstein's Summation Notation
If Twitter's character limit is cramping your style when tweeting complex mathematical equations to your followers, maybe you should consider Einstein's summation notation. Lose those giant sigmas in favor of implied summation over repeated indices. Whether you're trying to solve the mysteries of the shape of space-time, or just fed up with writing everything out in detail, try Einstein's summation notation. Einstein's summation notation, if your indices are doubled, bet you can't eat just one (Lay's).
@ Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Hycean Worlds and Nudging Asteroids" (2021). Walkabout the Galaxy Podcast. 174.