An unexpected guest has made its way into our Solar System. This is Oumuamua. Looks like a weird rock, right? Well, it’s an ...

I/ATLAS comet is the 3rd-ever object discovered that originated from outside our solar system. It's not a threat, approaches ...

Astronomers have followed 3I/ATLAS since its discovery on July 1. Hubble photographed it on July 21 from 277 million miles ...

The interstellar comet 3I/ATLAS reaches its closest point to Earth on Dec. 19, allowing close study with no threat to the ...

A study of the interstellar comet 3I/ATLAS reveals surprising characteristics: traveling at 57 km/s, it challenges ...

Interstellar comet 3I/ATLAS is making its closest approach to Earth, sparking a fierce debate. Harvard's Avi Loeb argues its ...

Gemini North observations reveal interstellar comet 3I/ATLAS has brightened and developed a green coma after perihelion, ...

New telescope images show interstellar comet 3I/ATLAS brightening and turning green after solar heating, raising questions ...

ESA’s XMM-Newton space observatory has captured Comet 3I/ATLAS in X-ray light. This marks the first X-ray observation of the ...

Every week, Space.com delivers the latest discoveries, launches, and cosmic curiosities from across the universe. From ...

The truth is that, following NASA’s press conference, this hypothesis has been completely ruled out; however, experts ...

Harvard's Avi Loeb argues the 3I/ATLAS anti-tail defies solar physics, suggesting the interstellar visitor is not a comet but ...