The widely talked about Comet 3I/ATLAS will pass by the sun on Thursday, but it will be December before stargazers can get a glimpse of the object. The first reported observations of the comet were ...

3I/ATLAS, an interstellar object identified by NASA as a comet, recently passed its closest point to the sun. Scientists around the world are observing its months-long journey to learn more about the ...

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

Comet Leonard, which last passed by Earth 80,000 years ago, has been dazzling the night sky before Christmas, and there's only a few days left to see the celestial object before it disappears forever.

Using the Atacama Large Millimeter/submillimeter Array (ALMA), scientists have discovered that the interstellar invader comet 3I/ATLAS formed in a much colder region of the Milky Way than our solar ...