The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Researchers believe they have rediscovered a mysterious star system first spotted in 2011. If true, the alien sun and its ...

NASA scientists have detected a star and trailing exoplanet that may be sailing through the Milky Way with unprecedented ...

Scientists found an intriguing world in our galaxy.

"We think this is a so-called super-Neptune world orbiting a low-mass star at a distance that would lie between the orbits of ...

Could our solar system have been temporarily exposed to an enhanced flux of cosmic-rays at some point in the ancient past?

NASA announced Wednesday that the odds of the up to 300-foot-wide asteroid hitting Earth dropped from record highs. See where ...

Astronomers discovered supersonic winds on a giant gas planet located over 500 light-years from Earth. In a study released Tuesday in Astronomy & Astrophysics astronomers who have been studying ...

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.

Gaining insight could help understand the timing and process of life's emergence. A research team led by a Rutgers-New ...

Gravity not only maintains the stability of these orbits but also influences phenomena like tides on Earth ... our solar system. Gravity certainly describes the motion of planetary mass bodies ...