Walkabout the Galaxy
Pluto, rogue planets, Moon
Astrophysics and Astronomy | Physics
If the controversy over Pluto's planetary status weren't already enough, what do you call a planet that is not even orbiting a star? The astroquarks explore rogue planets in this episode, planets that wander interstellar space, without a fire to keep them warm. We discuss how they nevertheless have been detected. Also, Addie's favorite body (rhymes with loon) and Jim's new favorite name, nerd news, space sponsor, and space trivia.
Enstrophy is delighted to be the first of the physics "E-something-y" quantities to sponsor Walkabout the Galaxy. Enstrophy, not to be confused with enthalpy, entropy, the Helmholtz free energy, Gibbs free energy, Landau free energy – really any kind of free energy, and certainly not with exstrophy, a congenital defect resulting in the protrusion of the bladder through the abdominal wall, is just a nice, harmless measure of how swirly things are. With Walkabout taking you from the swirling great red spot to the great swirls of spiral galaxies, what better E-something-y word to take along with you than Enstrophy: the other E-word.
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Going Rogue!" (2017). Walkabout the Galaxy Podcast. 22.