SETI Institute

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What happens when powerful ultraviolet radiation from an active star bombards the atmosphere of an alien world?

Join host Moiya McTier and guests Lori Huseby (University of Arizona) and Dr. Sarah Moran (NASA Goddard) as they explore how stellar radiation can alter exoplanet hazes—and why that matters when we're searching for habitable planets with telescopes like JWST.

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: Kamoʻoalewa

China’s Tianwen-2 spacecraft has arrived at Kamoʻoalewa, a tiny asteroid that travels alongside Earth as one of only a handful of known quasi-satellites. Some researchers suspect this unusual object may be a fragment blasted from the Moon long ago, and Tianwen-2 is now poised to help solve the mystery.

The mission marks the start of an ambitious investigation. Tianwen-2 will attempt to collect a sample from Kamoʻoalewa’s surface before spending months mapping and studying the asteroid from orbit, gathering clues about its composition, history, and possible lunar origin.

Credit: China National Space Administration

: Aurora Australis

The aurora australis arcs over Earth during an active solar event in this photograph taken on June 5, 2026, from the International Space Station as it orbited 271 miles above the Indian Ocean southwest of Perth, Australia.

Auroras are colorful, dynamic, and often visually delicate displays of an intricate dance of particles and magnetism between the Sun and Earth, known as space weather.

Credit: NASA/Jessica Meir