Walkabout the Galaxy

We love antimatter, and we love the matter-antimatter paradox. How come there was just a smidge more matter in the universe than antimatter? Neutrinos, the wispiest of particles, may provide a clue. We also check in on another Earth-like exoplanet, and Jim tackles a sexy stumper, plus space news, astronomy trivia, and more with your friendly neighborhood astroquarks.

We welcome special guest Dr. Zoe Landsman back to the show to tell us about the metal asteroid Psyche and the eponymous mission to visit it. We get an update on an observational test of one of the central pillars of cosmology, and have some spaceship/asteroid/comet trivia to stump the astroquarks.

Professor Mohamed Noor, Star Trek Advisor, Dean of Natural Sciences at Duke University, and author of "Live Long and Evolve", comes back to the show to share his thoughts on extraterrestrial organisms big and small. He also shares some behind-the-scenes activity from the Star Trek Cruise. We also learn about a crazy new validation of the constancy of the speed of light, more space news, and Star Trek trivia. We also answer the question, if underwear is the safest material, why not just wear underwear everywhere?

The astroquarks show remarkable restraint by refusing to say that Uranus emitted a big blob of gas. Instead they keep things astronomically professional with the discovery of a plasma bubble near the 7th planet in data collected in 1986 by the venerable Voyager 2. Zooming out even further, a possible explanation for conflicting data about the expansion of the universe may be that we are living in a giant bubble 100 million light years across, give or take. See if you can match wits with Charm and Top in our Greek mythology trivia questions.

The astroquarks take a social distancing break from each other, but not from you, with our first remote recording. We have all the Walkabout goodness to transport you to other worlds and stars, with news of the first discovery of particular kind of pulsating star, discovery of a certain kind of salt in a comet, and fun speculation about an exotic quark star. Join the astroquarks to escape your Earthly troubles for another entertaining walkabout the galaxy.

Professor Yan Fernandez, Principal Scientist of the Arecibo Observatory, joins Josh and Addie to talk about the unique capabilities of this enormous (300 meters!) radio telescope to study everything from the Earth's atmosphere out to distant pulsars. And speaking of magnetic stars, our dear old Sol seems to be rousing from its latest solar slumber and entering the next 11-year-ish solar cycle. Join us for all the space news and a slew of sci-fi trivia on this episode of Walkabout the Galaxy.

When regular run-of-the-mill black holes spiral into a deathly embrace, a gravitational chirp spreads across the universe, but when the behemoths in galactic centers merge, they cause a low rumble in space-time. Scientists are using nature's free ultra-precise astronomical clocks - pulsars - to hunt for this rumble. Closer to home the Earth has a new very-very-mini-moon, and the astroquarks face multiple energy-related trivia questions.

In this special Elizabethan episode of Walkabout, we check out the tired, battered, and bruised asteroid Pallas, one of the largest in the asteroid belt, and discuss why its neighbors beat up on it so much. We also take a peek at a new discovery about antimatter and an exotic quirk of quantum mechanics that also lives in the antimatter realm, catch up on space news, time travel shows, and much more.

We have an interesting new clue about what causes the ridiculously power phenomena known as Fast Radio Bursts (or at least about what doesn't cause them!), and we are joined by astroquark emerita Tracy Becker to tell us about the discovery of a baby moon around a near-Earth asteroid from the Arecibo Observatory. We also have Earth news and Space news and an energy round of trivia. Toss in a little matter-antimatter and it's another episode of Walkabout the Galaxy.

The astroquarks discover their new favorite thing in the universe. They'll tell you all about it and why we all have to hope it's a real thing. Also learn about ridiculous mathematical functions, the latest space news, and a little gravitational blippity-bloop for good measure.