The discovery boosts the chances of finding extraterrestrial life.

Astronomers have discovered a faint new world orbiting a young star after more than a decade of cosmic hide-and-seek ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

For decades, scientists and the general public have argued over the astronomical status of beloved dwarf planet Pluto. In the latest salvo, NASA Administrator Jared Isaacman said that he was “very ...

Mercury is due to join Venus and Jupiter in the night sky for an uncommon celestial event commonly known as a planet parade. Here's how to catch it.