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.

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 ...

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

Astronomers have discovered three previously unknown moons around Uranus and Neptune, the most distant planets in our solar system. The find includes one moon spotted orbiting Uranus — the first ...

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

Just six light-years from the solar system — in cosmic terms ... In 2016, astronomers found a planet orbiting the nearest star to Earth in this system, called Proxima Centauri.

And the Milk Way is just one galaxy in the Universe. Solar System – A group of objects orbiting around a star. Planet – A large, spherical object orbiting a star. Moon – A large object ...

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.