Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison with Pluto.

Eight planets, hundreds of moons, hundreds of thousands of asteroids, and billions of comets orbiting our Sun make up our Solar System. And not once has a single black hole disturbed our planetary ...

Across neuroscience, psychology and fringe physics, a provocative idea is gaining new language: that the human mind might be ...

An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, according to researchers ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet ...

The system, observed using the European Space Agency's Cheops space telescope, consists of four planets — two rocky and two ...

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

For over 50 years, we thought we knew the size and shape of Jupiter, the solar system's largest planet. Now, Weizmann ...

Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific ...

Jupiter is the largest planet in our Solar System and the fifth planet from the Sun. It is a massive gas giant made mostly of hydrogen and helium, the same elements that form stars.

From dazzling Jupiter high in the evening sky to elusive Mercury low at sunset, February 2026 offers one of the year's best ...

Stargazers can see six planets all in one evening during the second month of the year, especially Mercury, which is usually ...