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

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

The solar system's smallest planet is quickly approaching superior conjunction, so catch it in the morning sky while you can.

In a potential landmark discovery, scientists using the James Webb Space Telescope have obtained what they call the strongest ...

A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). Jupiter is our solar system's largest planet. The two brown dwarfs are gravitationally bound and orbit near ...

Mars is the fourth planet from the Sun in the Solar System . The average orbital distance of Mars from the Sun is about 230 ...

The planet is estimated as between the size of our solar system's smallest and innermost planet Mercury and Earth's moon. It is located about 140 light years away from Earth in the constellation ...

K2-18 b is part of the “sub-Neptune” class of planets, with a diameter greater than Earth’s but less than that of Neptune, our solar system’s smallest gas planet. To ascertain the chemical ...