We’ve grown up with the idea that the universe will expand forever, meaning the "cosmological constant" is positive. What if it's negative?

For humans, the most important star in the universe is our Sun. The second-most important star is nestled inside the Andromeda galaxy. Don't go looking for it -- the flickering star is 2.2 million ...

The concept of space is so intriguing that it fascinated our ancestors, and to this day, humans have been trying to figure out the big mysteries that it possesses. Even with all the technology that we ...

WASHINGTON, March 26 (Reuters) - Scientists using the James Webb Space Telescope have identified an ancient and faraway galaxy that provides evidence that an important transition period that brought ...