As elementary schoolers, we learned the order of the planets. Maybe your teacher even had a snappy mnemonic like “My Very Educated Mother Just Served Us Nine Pizzas” or “My Very Educated Mother Just ...

Of the seven Earth-sized worlds orbiting the red dwarf star TRAPPIST-1, one planet in particular has attracted the attention ...

Mars could have lost its liquid water, the key ingredient of life, because it is small, according to a study. Washington University researchers say that the Red Planet's size may be the key reason it ...

Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...

Astronomers have recently tracked a massive rogue planet, referred to as a “super-Jupiter,” that is drifting toward our solar neighborhood. This discovery has captured the attention of the scientific ...

Astronomers have detected a repeating radio signal from an exoplanet and the star that it orbits, both located 12 light-years away from Earth. The signal suggests that the Earth-size planet may have a ...

Artist's rendition of Mars with Earth-like surface water. We have a fleet of robots seeking out habitability on Mars, but is the planet too small for life in the first place? A new study suggests that ...