Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison ...

The Solar System is far larger than the neat diagrams found in textbooks. Beyond the planets lies a vast region of icy debris ...

A city-sized green comet, C/2024 E1 (Wierzchoś), is approaching Earth and will soon be ejected into interstellar space, ...

They show up as a mathematical solution in general relativity, basically as a time-reversed version of a black hole. Some ...

Mercury, the smallest planet in the solar system, holds an outsized secret that some researchers believe could reshape how ...

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

Every now and then, I fall down a late-night rabbit hole reading space facts, and the 30 on this list are the ones that truly messed with my brain. Fair warning: you might need a minute to recover ...

A distant star dimmed by 97% for nearly 200 days. Astronomers say giant rings around a brown dwarf or super-Jupiter may explain it.

It took the artist half a century of toil in the most remote parts of Nevada to build what may be the most extreme contemporary monument ever made. Now what?

Celestron FirstScope 76: Very affordable and ideal for kids or as a quick backyard scope. Despite the small size, you can easily catch the craters of the moon and even glimpse Jupiter’s moons.

Comet 3I/ATLAS was full-on erupting into space in December 2025, after its close flyby of the sun, causing it to ...

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.