We have launched all manner of satellite and machinery into low-Earth orbit. But what goes up must come down. Most often, these items burn up in the atmosphere upon re-entry, which isn’t good for air quality or the ozone layer.

But not everything incinerates — and increasing amounts of debris are hurtling back toward Earth and landing in backyards and farm fields. Falling detritus disrupts air travel and risks collision with infrastructure and people on the ground. There are those who argue that additional regulation is required around the launching and de-orbiting of these materials.

In this episode, host Ari Daniel speaks with astronomer Samantha Lawler and Smithsonian contributing writer Dan Falk about space junk and the concern among researchers that it is becoming a growing threat to public safety.

To subscribe to “There’s More to That,” and to listen to past episodes about all the shipwrecks hidden beneath the waters of the Great Lakes; the river of birds, bats and bugs fluttering, often invisibly, in the skies above; and the story behind the timelessness of Superman, find us on Apple Podcasts, Spotify, iHeartRadio or wherever you get your podcasts.

“There’s More to That” is a production of Smithsonian magazine and PRX Productions.

From the magazine, our team is Ari Daniel, Debra Rosenberg and Brian Wolly. From PRX, our team is Ali Budner, Cleo Levin, Genevieve Sponsler, Sandra Lopez-Monsalve and Edwin Ochoa. The executive producer of PRX Productions is Jocelyn Gonzales.

Fact-checking by Stephanie Abramson.

Episode artwork by Emily Lankiewicz. Illustration by Emily Lankiewicz / Images by Samantha Lawler / NASA / smspsy via Adobe Stock and public domain.

The Astronomical Problem of Space Junk