Walkabout The Galaxy

It's a satellite theme on this episode, with a sparkly disco ball in space, a long-lost scientific satellite tracked down by an amateur astronomy sleuth, and space trivia about all the junk in space. Join the astroquarks for a quirky quarky tour of our solar system, and some new evidence about the earliest history of life on Earth.

Clues to dark matter may be buried in the relics of the oldest stars in the galaxies. The old stars probably formed when the dark matter did, so their motions are probably similar. The astroquarks discuss what this means for understanding that mysterious stuff, plus using X-rays to navigate spacecraft and yet another peculiar meteorite. Dr. Jonathan Kollmer joins the gang for these topics, as well as a sci-fi trivia and nerd news updates.

Thank you Australia for giving us a meteorite called Bunburra Rockhole, and not just because the name is endlessly fun to say, but also because it hints at an origin from a missing asteroid. In this episode of Walkabout the Galaxy, the Astroquarks also take a look at Saturn's youthful rings, the link between star formation and the supermassive black holes in the hearts of galaxies, and space trivia and nerd news.

The astroquarks kick off the new year with a look at a clever and challenging new technique to detect gravitational waves created by supermassive black holes in the center of galaxies, and maybe even by the big bang itself. The waves make the Earth's position change, resulting in apparent changes in positions of things we look! Plus: astronomy predictions for 2018, nerd news, and space trivia. 

While terrestrial matters were frequently dark and depressing, 2017 was a banner year for the cosmos, or at least for our understanding of it. From Cassini's Grand Finale to LIGO's detection of neutron stars colliding, the astroquarks review the highlights of the year and a new story about a very old black hole from the dawn of the universe. A supermassive black hole formed before the universe was a billion years old, suggesting galaxy formation was off to a robust and early start. Join Josh, Addie and Jim for all that, nerd news and space trivia to wrap up 2017.

Antimatter, the stuff that lets the USS Enterprise fly about the galaxy is the topic of this episode of Walkabout the Galaxy because it's made in your garden variety thunderstorm. Lightning strikes have enough energy to drive nuclear reactions that produce antimatter electrons. Join the astroquarks for this and other heady topics such as the wobble of the Earth's axis in space trivia.

Disappointed that we don't have jetpacks and flying cars? Dr. Amanda Hendrix joins the Astroquarks to suggest an alternative: colonize Saturn's moon Titan, where a thick atmosphere and weak gravity mean we could all just fly like birds! Really! But, wait, there's more! Tune in to this episode of Walkabout for discussions of nearby moons and planets to colonize, space trivia and more.

Stars have a voracious appetite, gobbling up most of the stuff in their immediate neighborhood, leaving just a few scraps to make planets. Sometimes, though, even the planets do not escape the stellar maw. In this episode of Walkabout, the astroquarks discuss a neat observation that shows a star likely gobbled several rocky worlds at some point in its past. Plus, help NASA name a Kuiper Belt Object, and find out the link between the planet eater and Greek mythology in this episode's trivia.

That asteroid is rogue, and that's hyperbolic, but not hyperbole. The astroquarks welcome Dr. Dan Durda to discuss the first detection of a planetary object passing through our solar system that definitively came from another planetary system. All those Star Trek episodes where there is a wandering planet or comet or asteroid in space are now officially validated! 

If two neutron stars collide in a galaxy 130 million light years away and no one has a gravitational wave observatory to detect it, does it make a sound? Well, that's a silly question, but it happened, and not only was this cosmic catastrophe observed in the high energy light it emitted, but the rippling of spacetime was detected as well. Astronomy now has two independent ways of observing energetic events, and for the first time, something was seen using both techniques: electromagnetic waves (light) and gravitational waves. Join the astroquarks to hear about the first "kilonova" observed this way and what it has to do with your gold jewelry.

The astroquarks welcome noted science blogger and author Dr. Ethan Siegel whose new book Treknology takes a look at the intersection of science and science fiction. While you may already have a tablet computer, warp drive is probably still a few years away. But Elon Musk may be sending missions to the moon in less time than it takes the U.S.S. Enterprise to complete its 5-year mission (so, less than 5 years, get it?). Tune in for the latest news on exploration of the solar system as well as a look back to some classic Trek-nology with Dr. Ethan Siegel on this episode of Walkabout the Galaxy.

The astroquarks welcome WMFE space reporter Brendan Byrne who recounts his flight on the SOFIA airborne observatory. They hen vent about how the Nobel Prize committee has unaccountably once again passed them over. Here about this year's winners in physics, and a discussion of the history of the Kuiper Belt in this episode's space trivia. 

How exactly (and why) does a spacecraft get a "gravitational assist" from a planet en route to another planet? Where does that energy come from? The Astroquarks take a look at gravity assists and the OSIRIS-REx mission to grab some bits of a Near-Earth Asteroid and bring them back to Earth. Plus, the field of gravitational wave astronomy expanded now with the detection of a new black hole collision by two separate gravitational wave observatories. It's a weighty episode.

Josh recounts experiencing the end of the Cassini mission and recalls more than a quarter century of involvement with the project in this episode. Then the astroquarks take a look outward toward our galaxy and its retinue of dwarf galaxies and what that may say about how typical, or not, the Milky Way is in the grand scheme of things. All that plus Cassini trivia, nerd news, and a meteorological sponsor on this episode of WtG.

Asteroid Florence with her two mini-moons pays a visit to the Earth, while Tabby's Star continues to mystify with its unpredictable fluctuations in brightness. The astroquarks also cover the latest LIGO rumors about the detection of neutron star collisions, expanding the realm of gravitational wave astronomy. Plus Nerd News and Space Trivia!

New experiments have created diamonds in the conditions expected in the interiors of Uranus and Neptune. Former Top Astroquark Tracy Becker joins Josh, Addie and Jim to discuss diamond rain deep in the atmospheres of these giant planets. Join the astroquarks for nerd news, space trivia, and a bit of planetary science for good measure.

The astroquarks tell their eclipse stories from the Great American Eclipse. The Sun and every star has weather, spots, oscillations, flares and all sorts of activity. Some of this is revealed during an eclipse to the naked eye. Now, telescopes have enabled us to map the appearance of the red supergiant, Antares. Join Josh, Addie and Jim for this stellar episode of Walkabout the Galaxy.

The weight on that box of breakfast cereal ultimately traces back to "le grand K", a metal sphere in a vault in Paris, a wonderfully archaic standard for how much stuff makes a kilogram. We'll talk about the efforts to update that standard, the next Kuiper Belt Object to be explored by the New Horizons spacecraft, eclipses and occultations, and of course Zombies. Join the astroquarks for the latest astro-news, nerd news, and this episode's trivia about the length of the month!

The Sun doesn't just shine, it rings like a bell, or a drumhead wrapped into a ginormous ball of incandescent plasma. The astroquarks talk about how helioseismology tells us about the interior of the Sun, and new research shows some surprising changes in the Sun's outer layers. And the disappointing news from the realm of cosmology is that dark matter is probably not warm and fuzzy, depriving us of endless opportunities for jokes, not to mention that it would be awesome if we had fuzzy dark matter throughout the universe. Catch up on the latest astronomy, nerd news, and space trivia with the astroquarks on this episode of Walkabout the Galaxy.

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.