Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

The leading explanation for all of these mysteries is known as the giant impact hypothesis. According to this story, when the ...

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an ...

The discovery points to what astronomers have thought for decades, that Saturn's rings were caused by a massive collision ...

A huge haul of 128 newfound satellites might be a hint of past collisions in the planet’s orbit, or something else.

Their perfect alignment darkens the moon, from the perspective of folks looking up, because our planet's position blocks ... Earth and the moon align in that order. Long wavelengths of sunlight ...

As Venus approaches its inferior conjunction, astrophotographers have snapped some striking shots of the crescent planet ...

The sheer number of objects suggests scientists will soon have to grapple with what counts as a moon versus what’s just a ...

The Red Planet and its tiny moon Deimos were recorded at a very near distance as the asteroid-chasing spacecraft completed a ...

The sun, Earth and moon aligned in this order, and there's a total lunar eclipse when the whole moon slips into the umbra, the earth’s innermost shadow. When the Earth's shadow covers the moon's ...

Getting from Earth to space isn’t just about speed—it’s about planning the right trajectory. The Moon, our closest neighbor, ...