Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in ...

If our solar system seems stable, it's because our short lifespans make it seem that way. Earth revolves, night follows day, ...

Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

Space artists can sometimes stretch scientific data for a bigger visual bang. At New York's natural history museum, they ...

For decades it was thought that water was prevalent in the outer reaches of the Solar System early in its history, with comets and asteroids delivering moisture to Earth and the inner planets during ...

The orange dwarf Gliese 710 is expected to come within 0.1663 light-years or 10,520 astronomical units in about 1.29 million ...

When a young star forms, a ring of gas and dust called a protoplanetary disk forms around it. Together, the star and the disk ...

In a stunning peek into how planets are born, astronomers caught millimeter-sized dust grains clinging to the windy walls of ...

Mercury doesn't give up its secrets easily. The smallest planet in our solar system is also one of the most extreme—a ...