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

"We have been calling Uranus an ice giant, but we don't really know its nature." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers say ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Our solar system has been around for 4.6 billion years. While that sounds like a long time, it's ...

"These objects really could be anywhere in the solar system at any given time." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. One million alien ...

Astronomers discovered 3I/ATLAS earlier this week, and recently confirmed that it is an interstellar object. © K Ly/Deep Random Survey Update: July 3, 09:24 a.m. ET ...