After growing increasingly distant, two galactic siblings—the Milky Way and Andromeda—will reunite (billions of years from now).
The secret to the origins of life on Earth could be in the dust that's leftover after solar systems form.
For years scientists thought only two planets in our solar system had tectonic plates. But, now, it looks like Mars is joining the club.
An asteroid will whiz by Earth at 29,000 miles per hour. That could cause a big impact, but do we really have anything to worry about?
A Moment of Science looks at the many different moons in our solar system.
Learn about gravity, stars, and really big lumps on this Moment of Science.
Kepler’s Telescope has detected over 1200 possible planets. But this discovery is unique. Scientists found two planets in the same orbit in a system!
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Where did our planets come from?
It seems to be possible for planets in a stable solar system to somehow get off track and run into each other. Is our planet in danger?