As 3I/ATLAS passed through the inner solar system, the brightest images or the longest spectra were not the most significant measurements that the comet was to make, but the tiniest variations in ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

The space telescope ‘SPHEREx,’ jointly developed by the Korea Astronomy and Space Science Institute and the National Aeronautics and Space Administration (NASA), successfully observed the interstellar ...

Interstellar comets are the original cosmic explorers, and by studying their metallic whispers, we are learning the secrets ...

New infrared observations reveal that the rare interstellar visitor known as comet 3I/ATLAS has dramatically brightened ...

NASA’s SPHEREx telescope spotted interstellar visitor comet 3I/ATLAS flaring up while exiting the solar system. Scientists explain what caused it.

This week in science: the choice between tea or coffee could have greater consequences than you think; interstellar comet 3I/ATLAS makes its closest pass to Earth; astronomers track a runaway ...

Interstellar comet 3I/ATLAS has triggered fevered speculation after the James Webb Space Telescope detected an "out of order" burst of methane in its coma, puzzling even seasoned astronomers. While a ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

2025 was an exciting year for astronomical discoveries. Scientists got the best evidence yet for past life on Mars, discovered an interstellar comet zooming through our solar system, found clues of ...

A team of astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spaceship. The comet was confirmed in July 2025 as the third known object to enter our solar ...