So, if the planet doesn't orbit a sun, can it still be called a planet?
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?
Astronomers have found a planet with water known as HD 189733b.
Recently, scientists were able to revitalize a bacteria that's been dead for over 120,000 years! Are humans next?
It's time once more for the Science Hero Award, where we recognize someone from history who did terrific things to advance human understanding.
Ancient people believed comets were omens. Sometimes they were thought to signal the fall of empires, other times the birth of kings. Even today, when we’re all supposed to be much more intelligent, people do crazy things when comets pass by. Learn more on this Moment of Science.
Photosynthesis is the biochemical process in which energy from sunlight is converted by plants, algae, and some bacteria into sugars, which are used by the organism as food. That is, these organisms convert the energy of the sun into a different form of energy. However, there is a least one exception: a little bacterium deep under the Pacific Ocean which manages photosynthesis without sunlight. Learn more on this Moment of Science.
Why does earth only have one moon, while other planets have many? Jupiter alone has nearly 40 moons! Learn more on this Moment of Science.