NASA shares the moon’s exact distance from Earth and its impact on ocean tides, solar eclipses, and space travel. See how ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

For years, astronomers have toyed with the idea that the Sun hides an extra planet so distant and dim that even the best ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

the planet appears to take an unusual path around two brown dwarfs, whipping around at a right angle A new "Tatooine-like" planet outside the solar system may orbit two failed stars, scientists ...

A new "Tatooine-like" planet outside the solar system may orbit two failed stars ... the exoplanet appears to take an unusual path around two brown dwarfs, whipping around at a right angle.