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

In 2020, astronomers detected WD 1856+534 b, a gas giant that orbits a star 81 light-years from Earth. This exoplanet, which ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far ...

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

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

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

sitting in the Kuiper Belt - a region in our solar system beyond Neptune filled with icy objects, comets, and dwarf planets like Pluto. Since this hidden planet may be so far away, the new study ...

At a frigid -125 degrees Fahrenheit (-87 degrees Celsius), WD 1856+534 b is the coldest planet ever directly observed, ...

Scientists believe that they've discovered a new planet which may be part of the Earth's solar system. Thanks to advancing ...