A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The so-called 'planetesimal belts' are filled with tiny millimeter-sized particles created by collisions between comets.

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

Helium can help scientists detect the speed and direction at which we’re moving through space. Deuterium, which is left over ...

NASA's Juno spacecraft has discovered a giant volcanic hot spot on the surface of Jupiter's hellish moon Io. The eruptions in ...

Solaris promises to be a major platform for education and research, with a particular focus on academic research into the Sun ...

Planets with suns like Wolf 359 are subject to huge blasts of radiation that raise questions about their long-term ...

Gaia-4b is considered a super-Jupiter planet, a relatively cold gas giant, orbiting its star over 570 Earth-days. That star ...

Moons and satellites that primarily orbit other bodies in the solar system, have their own closest points to their parent body. For objects orbiting Earth, that point is called perigee.

According to Chen, since the discovery of the first exoplanet in 1992, researchers have wondered how common solar systems—a group of planets orbiting a star—are, as well as how many of those ...