Planetary Nebulae and Active Asteroids Get a Closer Look

There's always been a fuzzy line between asteroids and comets, and new observations of asteroids in the vicinity of Jupiter provide a hint to the origin of the mysterious active asteroids that look like asteroids but act like comets. Elsewhere in the galaxy, the famous ring nebula gets a new spectral image that shows the presence of band of iron. Could it be the remnants of a planet like Earth or Mercury that was vaporized when the nebular formed? Tune in for our take on this, space news, trivia and much more.

You can listen to Planetary Nebulae and Active Asteroids Get a Closer Look online on Radio and Podcast. Open the player on this page to stream the available audio.

Planetary Nebulae and Active Asteroids Get a Closer Look is an episode from Walkabout the Galaxy by Joshua Colwell.

This episode is 41:10 long.

This episode was published on Feb 5, 2026.

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