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

The space agency got a close look at the interstellar visitor over the past few months as it zipped by Mars and the sun ...

With the government reopened, the space agency at last released pictures captured by a fleet of government spacecraft of an ...

"It's going to look different because it didn't come from our solar system and that's what makes it so magical." ...

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

As far as physical features, NASA says 3I/ATLAS has speed, color, and direction that are, “consistent with what we’d expect ...

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

The unusual comet—which is to pass Earth again in the coming weeks—is only the third known object to visit us from outside ...

NASA is unveiling close-up pictures of the interstellar comet that's making a quick one-and-done tour of our solar system.

A viral video of 3I/Atlas has sparked wild theories, but space scientists break down the real science behind it.

NASA Scientist Tom Statler termed it “a window into the deep past,” and the phrase has rapidly become the emotional center of ...

What does it mean when a comet racing at about 130,000 miles per hour shows hydrogen signatures unlike anything seen in our ...