Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

The universe is a boundless stage for cosmic events that captivate astronomers and stargazers alike. Among these pheno ...

Mars has two moons, Phobos and Deimos. Scientists still debate whether these came from asteroids that passed close into Mars' ...

January's sky brings a planet parade, Mars opposition, and the Quadrantid meteor shower. Enjoy Venus and Saturn's close ...

planets in our solar system are classified as either terrestrial (Earth-like) or Jovian (Jupiter-like) planets. Terrestrial planets include Mercury, Venus, Earth, and Mars. These planets are ...

Venus will pass to the north of the much-fainter bluish star Regulus (in Leo, the Lion) on the morning of Sept. 19; the ...