Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

NASA was to supply some critical technologies for the mission, which Europe may not be able to readily replace.

New research suggests that Mercury's crust is shifting and twisting in unexpected ways thanks to the force of the Sun.

The brilliant flash, which was accompanied by a sonic boom that many mistook for an earthquake, resulted in hundreds of calls ...

But in the early 1980s, Dennis Hope, who had been unemployed for around a year, believed he had found a loophole. The Outer ...

The only evening planet for July is Mars, faint red in the west at dusk, and getting lost in the Sun’s glare by August. High ...

The solar system has many more moons than the one we can see in the sky. ... Venus does have one known quasi-moon, ... Mars' ...

NASA science dollars generate $337 million in Arizona's economy each year, so the budget bill as written now would be a huge ...

A team of researchers has outlined how a new "direct fusion drive" propulsion system could allow us to reach Sedna this ...

The planet Jupiter has no solid ground – no surface, like the grass or dirt you tread here on Earth. There’s nothing to walk on, and no place to land a spaceship. But how can that be? If Jupiter doesn ...