A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The comets A6 (Lemmon) and R2 (SWAN) are visitors from the chilly fringes of our solar system, and could even be visible at ...

While Planet Y has been not yet been directly observed, unexpected inclinations found in the orbits of roughly 50 distant ...

A NASA mission, IMAP, and two more spacecraft that will study space weather are traveling through space atop a single SpaceX ...

It’s something we’ve seen play out many times in Star Trek, Star Wars, Battlestar Galactica, and more, though few games let ...

The spacecraft will map the boundaries of the heliosphere, study how Earth’s outer atmosphere reacts to solar activity and ...

The bottom half of the world, known as the Southern Hemisphere, is about to be treated to a partial solar eclipse that won't ...

On October 3, Comet 3I/ATLAS will be almost 29 million kilometers (18.006 million miles) from Mars. The European Space Agency ...

Liftoff is scheduled for 7:30 a.m. ET today (Sept. 24). SpaceX will launch NASA's ambitious IMAP mission and two other space ...

On Sept. 21-22, a partial solar eclipse will see the moon sweep over the sun's disk, blocking its light over a swathe of the ...

Enter the European Space Agency’s two Mars satellites, which now have their cameras pointed at 3I/ATLAS. The comet also could ...

We all picture the Solar System as a neat cosmic racetrack with planets orbiting the Sun on a flat, organized path. But have you ever wondered what lies above and below that path? In this video, we ...