The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

Mercury takes only 88 Earth days to orbit the sun.

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

This provides another piece of the puzzle to understand how planets and ... could reshape our understanding of the Earth-Moon system and the broader solar system. The ...

An exoplanet is a planet outside our solar system that usually orbits a star in our galaxy. More than 7,000 have been found ...

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...