When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The recent and much-ballyhooed "planetary parade" was an interesting celestial event that likely ...

Learn more about brown dwarfs, the cosmic misfits that blur the line between planet and star.

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...

How old is Earth? Our planet's age is known from a variety of sources, from rocks on our own planet to ones from the moon. When you purchase through links on our site, we may earn an affiliate ...

"We reference the planets as symbols to better understand our lives," PEOPLE's resident astrologer Kyle Thomas says Skyler Caruso is a Writer and Reporter of PEOPLE Digital Entertainment. She joined ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Sky-watchers who saw the Venus-Jupiter conjunction on ...

We argue that taxonomical concept development is vital for planetary science as in all branches of science, but its importance has been obscured by unique historical developments. The literature shows ...

Scientists may have finally revealed the history of the tantalizing TRAPPIST-1 system, an intricate collection of seven worlds that sit about 40 light-years away from us. These worlds, many ...

For centuries our solar system was the only planetary system known to humans. We had no proof other worlds existed beyond those in our own cosmic backyard, and we imagined that if other planetary ...

Artistic illustration of the internal structure of a lava planet in a cold state, showing a day‑side magma ocean overlain by a mineral atmosphere. The arrows indicate the direction of heat transport ...

As the nights remain long and dark, we find ourselves with nearly half of the planets in retrograde in early 2025 with more soon to encounter the apparent backward motion. The current lineup includes ...