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?
Nowadays everybody knows there are nine planets in our solar system, but that information was hard won.
Could Titan support life? Scientists hope to learn more about Titan's atmosphere to find out!
A Moment of Science gives a Science Hero Award to Galileo!
Black holes were always the most dangerous thing when traveling through space in science fiction shows. What are black holes and how do they form?
Learn how Ole Roemer learned that light does take time to travel.
Venus may appear to glow under moonlight but the planet also glows in infrared light.