An alien comet passing through our solar system made its closest approach to Mars recently, and two European robotic ...

We're just weeks away from this interstellar visitor reaching its brightest in Earth's night skies. Will we see it?

What makes 3I/ATLAS especially intriguing is that the comet might be three billion years older than our entire Solar System.

The interstellar comet 3I/ATLAS may be out of view of Earth, but orbiters on Mars were able to recently get a look at it.

The images taken by two Mars orbiters show a bright, fuzzy white dot of the comet, also known as 3I/ATLAS, appearing to move ...

Interstellar comet 3I/ATLAS — just the third such object ever confirmed to have entered our solar system — flew past Mars ...

Space missions in the future could travel to Mars, asteroids and the outer solar system by riding on nuclear-powered rockets, ...

The European Space Agency also hoped to observe the interstellar object during its close approach to Mars using two satellites, the Mars Express and the ExoMars Trace Gas Orbiter, while NASA hopes its ...

The asteroid belt may seem permanent, but it is far from static. Its slow decline reveals a more violent past when more ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Humanity's drive to explore has taken us across the solar system, with astronaut boots, various landers and rovers' wheels ...

Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be ...