Still, science being science, we needed proof—and we got it in 1992, when two astronomers found two planets orbiting a pulsar ...

When astronomers search for planets that could host liquid water on their surface, they start by looking at a star's habitable zone. Water is a key ingredient for life, and on a planet too close to ...

New orbital anomalies detected in the outer Solar System have reignited the debate over the existence of Planet 9. The data ...

Learn more about volcanic activity on Mars and how it may have once provided vital elements to the atmosphere.

If any giant planets orbited Eta Cassiopeiae A within about 8 AU, astronomers could spot their telltale signature in the spectrum of light from the star. And since no planets at all can survive the ...

Scientists think there may be a ninth planet hiding in the distant reaches of the solar system — and a new telescope could finally prove its existence. | Credit: Nicholas Forder for Live Science Deep ...

There is only one planet we know of, so far, that is drenched with life. That planet is Earth, as you may have guessed, and it has all the right conditions for critters to thrive on its surface. Do ...

A newly identified tectonic "regime" may rewrite our understanding of how rocky worlds evolve, scientists report in a new ...

If the sky is clear tonight, look up high and try to find Lacerta (the constellation of the Lizard), between Cygnus and Cassiopeia. How many stars can we see, and could any of them be hiding habitable ...

SAN JOSE, Calif. — HAT-P-7b is a bizarre slice of hell, a giant gas planet 40 percent larger than Jupiter that orbits so close to its sun that its year lasts just 2.2 Earth days and its atmosphere is ...

Astronomers have been scouring the outer solar system for signs of a hypothetical ninth planet for almost a decade, without success. However, we may finally be on the cusp of finding it, experts say.