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

Earth spins as it orbits the Sun, and the solar system is orbiting the galactic center. So, if I go outside and look up, in ...

A rare four-planet conjunction will be visible most of this month as Venus, Jupiter, Saturn, and Mars light up the sky.

Stargazers won't need any special equipment to view the four-planet alignment as it will be visible to the naked eye. However, if you have a telescope, you can spot two additional planets, Uranus and ...

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Billions of years ago, in the frigid outer reaches of our solar system, two icy worlds collided. Rather than destroying each ...

Using the VLT Survey Telescope (VST), astronomers from Italy and Germany have observed a group of galaxies designated NGC ...