Frost Line

Ceres Probably Formed Farther out in the Solar System and Migrated Inward

When Sicilian astronomer Giuseppe Piazzi spotted Ceres in 1801, he thought it was a planet. Astronomers didn't know about asteroids…

1 month ago

Organic Matter Could Have Delivered Earth’s Water

The origin of Earth's water is a big piece of the puzzle in Earth's history. Did it come from comets…

2 years ago

Why Doesn’t Earth Have Rings?

You'd think Saturn has all the luck, with its awesome rings. But it turns out, living on a planet with…

5 years ago

What is the Coldest Planet of Our Solar System?

Neptune, being the farthest planet from the Sun (sorry Pluto!) is now recognized as also being the coldest body in…

6 years ago

What is the Surface Temperature of Neptune?

Given its distance from the Sun, and the nature of its composition, Neptune is renowned for being the coldest planet…

6 years ago

Friendly Giants Have Cozy Habitable Zones Too

According to a recent study from the Carl Sagan Institute, aging red giant stars could still have habitable zones that…

6 years ago