Interstellar comet 3I/ATLAS, the third known object to enter our solar system from another star, underwent a dramatic chemical and physical shift after swinging past the Sun. Observations by the James ...

Rather than being an alien craft, 3I/ATLAS likely formed 12 billion years ago at a key moment in the early Universe ...

For months now, astronomers have been closely watching the mysterious interstellar object 3I/ATLAS as it rips through the solar system at a breakneck velocity. And before it finally leaves us for good ...

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The arrival of 3I/ATLAS in our solar system spawned multiple proposals for a rendezvous mission to study it up close. As the third interstellar object (ISO) ever detected, the wealth of information ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the third known interstellar comet ever spotted. When scientists turned NASA’s ...

Benevolent interloper or interstellar poison pill? With 3I/ATLAS set to fly by Earth in two weeks, Harvard professor Avi Loeb is debating whether our interstellar visitor is friend or foe — an answer ...

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New observations of the interstellar comet 3I/ATLAS include the first measurement of the abundance of deuterated water relative to ordinary water in an interstellar object. Astronomers using the ...