Canadian scientists studying water found deep in an underground mine have determined that the water is at least 1.5 billion years old, and maybe much older.
Scientists have a new estimate for the geological age of one of Mercury's oldest regions.
One of the great mysteries: Does life exist elsewhere in the universe. Research has found that such planets may be more common, and much closer, than we think.
Did you know it seems we're discovering a new exoplanet every week?
A Moment of Science looks at the many different moons in our solar system.
So, if the planet doesn't orbit a sun, can it still be called a planet?
Learn about gravity, stars, and really big lumps on this Moment of Science.
If you could see an alien planet from Earth, you wouldn't necessarily need to look for cities. You could just check for oxygen in the atmosphere.
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?