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

With a rare black moon and the peak of the year's first major meteor shower already behind us, January is shaping up to be an ...

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 ...

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

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

This January, the night sky offers a stunning display featuring the Quadrantid meteor shower and a rare alignment of four bright planets visible in a single view. Witness Mars at opposition, shining ...