In the search for extraterrestrial life, it makes sense to first look for rocky planets with an atmosphere, like Earth.

This week, five planets—Venus, Jupiter, Mars, Mercury, and Saturn—are visible at various times, all leading up to the full moon on September 26. They're known as the "naked eye planets" because they ...

See Venus, Jupiter, Mars, Mercury and Saturn light up September's sky before the Harvest Moon peaks on Sept. 26. No telescope ...

Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like ...

Astronomers have confirmed a Jupiter-size planet less than a million years old, making Elias 2-24 b the youngest known planet and giving scientists a rare look at a world still being born. Its ...

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether ...

Planetary magnetic fields act as protective barriers, shielding a planet’s atmosphere and surface from energetic charged particles originating from its parent star and outer space. During its fourth ...

This year's harvest moon will appear in a triangle with two planets, and you can see one without binoculars.