Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) The interstellar comet, originally called A11pl3Z and now ...

Explore the true scale of the Solar System in this video, which illustrates the relative sizes of the planets and their ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

3I/ATLAS first made news in July when scientists confirmed it as the third-ever observed interstellar interloper in our solar system. The space object further attracted the public's fascination again ...

3I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the galaxy. By Kenneth Chang For only the third time, astronomers have found ...

The anomalous nature of the object led astrophysicist Avi Loeb to apply a thought experiment to it, highlighting everything about it that might align with a hypothetical alien spacecraft.

It was first discovered on July 1, sparking fears of an alien invasion. Now, scientists have provided a chilling update on the mysterious 'interstellar object' racing through our solar system. Using ...

A diagram shows the trajectory of interstellar Comet 3I/ATLAS as it passes through the solar system. It will make its closest approach to the sun in October. Late in the evening on July 1, a telescope ...

Folks, it's official: the object that astronomers recently spotted blowing through the outer solar system came from interstellar space. Yesterday, the intriguing stranger was named A11pl3Z. Now, it's ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely visible in the sky.

From meteor showers to visible nebulas, August is primed to be an action-packed month for stargazers in the United States. And one of the highlights of the month? The impending meet-up of Jupiter and ...