The Earth stands alone in the solar system as a habitable world, as far as we know. But that doesn’t mean we don’t get visitors, most often in the form of (usually harmless) asteroids. Some even ...

In this curious film, a pair of friends venture out into the desert to build an accurate to scale model of our solar system.

The sun is in its most active phase—solar summer—causing auroras and posing real risks to satellites, GPS, and power systems ...

So the bottom line is that the gravity of the closer tidal bulge on the Earth is pulling the Moon forward, which increases the size of the Moon’s orbit. This means that the Moon gets slightly farther ...

On Sept. 18, 1977, NASA's Voyager 1 spacecraft took a photo of Earth and the moon. It was the first time both the Earth and the moon were captured in a single frame. At the time, Voyager 1 was more ...

The Moon, our constant celestial companion, is drifting away from Earth at a slow but measurable rate. According to a ...