Walkabout the Galaxy

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Episodes

Date Title & Description Contributors
2024-06-12

  Full Circle to the Origins of Carbon and Exotic Gravity

The Astroquarks celebrate their 360th episode with discoveries showing carbon much earlier in the universe than previously thought possible, and an exotic new proposal as an alternative to dark matter. Plus, we have radioactive trivia and a slew of spa...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-06-05

  Volcanic Activity on Venus RIGHT NOW!

There is a mountain - or should we say a volcano - of evidence, building that suggests volcanic activity on Venus during the time of the Magellan mission in the 1990s. We’ll dig into that, struggle to get our script right, ponder the Fantastic Voyage, ...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-05-30

  Watery Erigone and Rogue Stars in the Milky Way

New observations of Erigone, the parent body of an asteroid family, indicate its rocks are juicy with water. That makes it both a potential resource for future missions but also shows that asteroids may have played a big role in delivering water to the...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-05-15

  Dyson Spheres and a Molten Planet

The Astroquarks delve into the possibility of giant alien constructs around stars, and the strange weather on a planet that is unreasonably close to its star. Join us for space news, trivia, and a fun exploration of odd topics in astronomy on Walkabout...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-05-08

  The Low Down on Big G and the Young Moon of Dinkinesh

NASA's Lucy mission discovered a surprising moon of the small asteroid Dinkinesh on its way to the orbit of Jupiter. New studies of that moon, a contact binary, suggest it may have a surprisingly young age. Meanwhile, cosmologists continue to wrestle w...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-05-01

  Dark Matter Wins Again

A clever test of dark matter and an alternative theory of gravity to explain the motions of stars around galaxies results in another check in the win column for dark matter. Simulations with the modified model of gravity failed to explain the motions i...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-04-03

  Surprises from Bennu and the Milky Way

Analysis of the samples returned from the asteroid Bennu have revealed surprising assemblages of minerals that put new constraints on the origin of the solar system. And once Top Quark Jim Cooney stops giggling, he tells us about the discovery of an it...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author
2024-03-27

  The Dark Ages of the Universe

We peer back in time both to the murky history of our own solar system and to the dark ages of the universe. The JWST has confirmed that dwarf galaxies were the first to illuminate the universe, putting an end to the dark ages that followed the cooling...
  Josh Colwell, Addie Dove, Jim Cooney author
2024-03-20

  A Nova Visible this Year?

One of only a handful of recurrent novas, white dwarf stars that undergo a periodic explosive brightening as they accrete material from a neighboring star, is showing signs that it may be ready to blow sometime in 2024! Visible in the northern hemisphe...
  Josh Colwell, Addie Dove, Audrey Martin author
2024-03-06

  Psyche Revisited and Two Giant Black Holes

The presumed metallic asteroid Psyche gets a new look before the spacecraft of the same name gets there in 2029, and it reveals different spectral characteristics than were observed in previous studies. We discuss the mystery of metallic asteroids and ...
  Josh Colwell, Addie Dove, Jim Cooney, Audrey Martin author