It's been 30 days since Uranus first appeared in the sky. At first, it looked like our Moon had found itself a stellar ...

Jupiter.... Uranus.... Saturn... Earth? Sadly, Earth didn't make it onto the list of the Solar System's ringed planets. If it ...

Pluto's days, though they drag on a bit at around 153 hours, are nothing compared to its years. Pluto's orbit takes 248 Earth ...

Throughout December, the SETI Institute appeared across leading science and media outlets, reflecting the SETI Institute’s ...

"Look to the east and all evening long, you'll be able to see the planet in the constellation Gemini," that site said. "It ...

Superionic water—the hot, black and strangely conductive form of ice that exists in the center of distant planets—was ...

Far from the Sun, Uranus sits tipped on its side, carrying a magnetic system unlike any other planet’s. Its equator tilts ...

The king of the solar system, the giant planet Jupiter, will reach opposition. Because Earth will be almost directly between ...

Many astronomical events, such as meteor showers, run by calendrical timings as well. But our moon and the other planets move ...

If scientists are able to inspect it in person, and they find that Mars was indeed once alive with microbes, we would know ...

It was a year that saw roughly six million Americans hold hands in a continuous (more or less) line across the country to ...

The solar system’s largest planet shines bright as the Moon wanes and Saturn’s moons dance in the sky this week.