Walkabout the Galaxy
Europa; dwarf planet; cosmological magnet fields
Astrophysics and Astronomy | Physics
Where would you go and what would you bring with you if you could explore any object in the universe? Our cosmologist Jim Cooney wants to look for aliens underneath Europa's icy shell. This shell's complicated fractures may owe something to a new form of ice discovered in a delightfully simple experiment. Further out, a dwarf planet beyond Neptune has a ring unlike any we've seen before, and a delightfully complicated experiment may explain the origin of cosmological magnetic fields.
More than just an amazing twelve month vacation, the tropical year is what keeps the equinoxes and solstices from drifting around your calendar. This clockwork combination of the earth's annual elliptical journey around the sun, orbital procession, and the wobble of the earth's spin, is your key to making sure your summer vacation actually happens in the summer. Whether your are citing the solstice at an ancient archeological site, or planning a party for the longest day of the year, let the tropical year keep your dates straight. The tropical year, feel pure good everyday (Tropicana).
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; Cooney, James; and Martin, Audrey, "Whacky Water and Weird Rings" (2023). Walkabout the Galaxy Podcast. 232.