Cosmologists are increasingly entertaining a radical possibility: that the cosmos might fold back on itself so that, on the ...

But there are several important anomalies, including a widely debated one called the Hubble tension. It is named after Edwin ...

This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. Everything on Earth, in our solar system, our galaxy, and beyond is contained within ...

Is the universe infinite? It's one of the most profound questions we can ask, and here's the short answer: We don't know. While we have learned a great deal about the universe, a portion of the cosmos ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. After a century of observations spanning the breadth of the cosmos and theoretical insights that ...

The universe is bigger than what we can currently see. The universe's age limits how far we can observe. The observable universe has boundaries, but the universe itself may be much larger.

A glow undetectable to the human eye permeates the universe. This light is the remnant signature of the cosmic beginning — a dense, hot fireball that burst forth and created all mass, energy, and time ...