Biggest vs smallest - how do we measure up in the grand scheme of the universe? Explore the fascinating scales of existence, from quantum particles to the observable universe’s edge. A journey into ...

Jupiter has 80 known moons, with more still being discovered by astronomers and amateur sky-watchers alike. That’s second only to Saturn’s 83 moons in our Solar System. The below video does a cool ...

It might not seem obvious why astronomers need multiple different powerful space telescopes. Surely a more powerful telescope is better than a less powerful one? So why are there multiple different ...

Astronomers warn that BlueWalker 3, a test spacecraft with a large array of antennas, could be the first of many larger satellites in low-Earth orbit that interfere with astronomical observations. By ...

"It is unacceptably bright for many sky observers around the world." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On Monday (Oct. 2), ...

WASHINGTON, Feb 15 (Reuters) - Weather balloons, civilian drones and other non-military aerial gadgets are all possible explanations for the mysterious objects the U.S. military has shot out of the ...

A new study analyzing historical photographs taken by the Palomar Observatory between 1949 and 1957 has detected several mysterious bright spots in the sky. These transient objects, captured on film ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...