In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

Venus, Saturn, Jupiter and Mars will appear to line up and be bright enough to see with the naked eye in the first few hours ...

Gas from the seafloor has scientists wondering if oxygen could be found in the oceans of other planets.

A parade of planets is coming this January, but if you miss it, you can catch it in later months. Six planets in our solar ...