Add Yahoo as a preferred source to see more of our stories on Google. Some exoplanets, like the one shown in this illustration, may have atmospheres that could make them potentially suitable for life.

Our solar system hosts almost 900 known moons; more than 400 orbit the eight planets while the remaining orbit dwarf planets, ...

Relative sizes of the newly discovered habitable-zone planets and Earth. Left to right: Kepler-69c, Kepler-62e, Kepler-62f and Earth (except for Earth, these are artists' renditions). Image credit: ...

NASA researchers identify optimal infrared wavelength for detecting carbon dioxide and methane on exoplanets, guiding the Habitable Worlds Observatory’s design and sensor specifications.

Computer simulations suggest NASA’s Habitable Worlds Observatory could detect Earth-like exomoons around gas giant exoplanets through reflected starlight and lunar eclipses.

Astronomers have identified Proxima Centauri b, a rocky planet just over four light-years away, as the closest potentially ...

It’s a sweltering Tuesday in Washington, D.C., the kind of day that stretches the definition of Earth as a “habitable” planet. But on an eighth-floor terrace near the U.S. Capitol building, dozens of ...

Located about 39 light-years from Earth, the TRAPPIST system resembles a miniature version of our solar system: The star, an ultracool red dwarf, and all its planets would comfortably fit inside the ...

A new scientific study suggests that Mars may have experienced a warm and wet climate billions of years ago, challenging the long-standing theory that the planet was predominantly cold and icy during ...

An artist's impression of a coronal mass ejection on a star Olena Shmahalo / Callingham et al. For the first time, astronomers confirmed a massive expulsion of plasma from a star other than the sun. A ...