Short Wave Why Experts Are Racing To Learn About This Interstellar Comet
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Dec 2, 2025 
John Tonry, an astronomer behind the ATLAS survey, shares his insights on the interstellar comet 3I/ATLAS. This comet, visiting from another solar system, offers a unique chance to learn about planetary formation. They discuss the comet's icy features and why it's crucial for comparison with other systems. Tonry also addresses wild theories about alien technology, emphasizing natural explanations instead. Discover why astronomers are eager to study such rare objects and how ATLAS plays a pivotal role in planetary defense.
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One-Time Interstellar Visitor
- 3I/ATLAS is an interstellar comet that formed around another star and will pass through our solar system only once.
- Scientists call it a unique chance to study material ejected from another planetary system.
Material From Another Solar System
- 3I/ATLAS offers the only realistic way to get physical material from another solar system in our lifetimes.
- Studying it can reveal chemical clues about how planets form around other stars.
From One To Three Interstellar Finds
- Teddy Cornetta recalled expecting to never see another interstellar object after 2017's ʻOumuamua.
- He then ended up studying two more, including 3I/ATLAS and 2I/Borisov.