It’s “common knowledge”—and the scare quotes should be a warning—that the sun is an average star.

In this video, we explore the vastness of the universe and attempt to quantify its size. We delve into the concepts of cosmic ...

The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

The observatory aims to answer a number of questions about the universe by studying different phenomena in the sky, including supernovae (exploding stars), asteroids, dark matter and the properties of ...

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

Here’s what you’ll learn when you read this story: A new paper adjusts an equation that defines our universe in response to recent new data. The cosmological constant, which describes how our universe ...

A novel theory suggests that the current expansion rate of the universe is not fixed, but was in fact quite different in the ...

Andromeda and the Milky Way merge. NASA; ESA; Z. Levay and R. van der Marel, STScI; T. Hallas; and A. Mellinger Share Curious Kids is a series for children of all ages. If you have a question you’d ...