We all picture the Solar System as a neat cosmic racetrack with planets orbiting the Sun on a flat, organized path. But have ...

Researchers rarely get a glimpse of an interstellar object up close like 3I-ATLAS, so they have jumped on the opportunity to learn about its composition, which can reveal how planet systems are made.

A peculiar interstellar visitor, 3I/ATLAS, is challenging comet theories with its sunward tail and unusual composition. While ...

While 3I/ATLAS is getting all the attention, there are a number of other comets visible through telescopes and binoculars in ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS. A remarkable ...

The comet could be older than our solar system. The comet is also distinct because nickel vapor was detected in the gas ...

Time now for an interstellar flyby. Let's meet a very old comet, 3I/ATLAS. DARRYL SELIGMAN: 3I/ATLAS is probably somewhere between 3 billion to 11 billion years old. So it's presumably been traveling ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Asteroid ‘Families’ Reveal Hidden Histories and Impact Risks across the Solar System ...

A planet parade featuring all seven of the other planets in the solar system will peak tonight, just over a month since the last one. If you missed January’s spectacle, make sure you tune in to this ...