There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

For almost a decade, astronomers have been searching for a ninth planet in the solar system. Recently, new evidence of ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

Could a lonely planet wander aimlessly through the restless galaxy change the subtle dance of gravity within our solar system ...

The Sun's formation caused temperature differences in the surrounding disk of gas and dust. Inner, hotter regions formed rocky planets from less volatile elements. Outer, colder regions allowed ...

While Earth spins in the same direction as the sun, that's not the case for every planet in the solar system. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

For all the talk about life across the cosmos, Earth remains the only confirmed example. That single data point makes your ...

On some, whipping winds send a rain of glass flying sideways; others have a core of carbon compressed into diamond. Take a look.

The Science of Siblings is a series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We’ll be sharing these stories over ...

Mars is within 5 degrees of Mercury from Oct. 12 through Oct. 29, but is much fainter. On the evening of Oct. 19, the two planets will appear closest together, just 2 degrees apart. About 30 minutes ...