The National Aeronautics and Space Administration has confirmed an interstellar object is passing through our solar system.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and Earth. The authors dubbed it Planet Y.

According to NASA, today (3 October) is actually the day when it's going to come 'closest' to Mars, though closest in this case is still 18.6 million miles, which is a really long way.

A massive comet traveling through the solar system is much larger than previously thought and could be a remnant of alien ...

In July, NASA reported its ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Chile identified a comet ...

There are quite a few other places we might find life in the solar system, including dwarf planets like Ceres. Ceres is ...

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

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say.

NASA is set to launch three spacecrafts Tuesday with the goal of unlocking the mysteries of solar weather at the edge of our ...

Pluto is a bit of a loner. The dwarf planet is no longer considered a regular planet; it does not orbit on the same plane as ...

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 ...