The solar system could be packed with 1 million alien visitors, space rocks shaken away from our cosmic neighbor Alpha ...

NASA's most remarkable achievements include launching Explorer 1 in 1958, the 1969 Apollo 11 moon landing, and the Hubble ...

The stars as seen from Earth would have looked dimmer 14 million years ago, as the solar system was in the middle of passing ...

"The universe is filled with a range of three-body systems, including the closest stars to Earth, the Alpha Centauri star ...

When a mudflat crumbles on Earth, or an ice sheet splinters on one of Jupiter's moons (Europa), or an ancient lakebed breaks ...

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

Blue Ghost runs on solar power, the reason it will only operate for two weeks. Shortly after the sun sets at its location, the temperature will drop rapidly (the moon is essentially airless), ...

That's right, just like the popular TV game show, we've gathered a list of “Are You Smarter Than a 5th Grader” questions and answers to determine whether you're a total whiz kid or need to return to ...