On November 20, Astronomy magazine hosted a live event featuring nine speakers, all standouts in the world of amateur ...

The object is the third interstellar visitor to our solar system ever confirmed. It will reach its closest point to Earth ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

NASA is providing more images and information about the interstellar object that's passing through our solar system right now ...

Interstellar comet 3I/ATLAS, third visitor to our system, is pure ice—no technosignatures, says NASA on 19 November 2025.

As space agencies track the comet's path, 3I/ATLAS is offering astronomers rare clues about what lies beyond our Solar System ...

The nucleus, estimated from Hubble Space Telescope images to be at most a few kilometers across, cannot be resolved in our HiRISE image. Additionally, due to spacecraft jitter during the observation ...

NASA unveiled close-up pictures on Wednesday of the interstellar comet that’s making a quick one-and-done tour of the solar ...

David Jewitt, professor of astronomy at UCLA, discusses the comet known as 3I/Atlas, which is only the third confirmed object to visit our corner of the cosmos from another star.

It's possibly as big as Manhattan, likely older than our own solar system, and it's traveling through space at speeds of up ...

NASA released fresh images on Wednesday of the interstellar object called 3I/ATLAS that astronomers have determined is a ...