Biggest vs smallest - how do we measure up in the grand scheme of the universe? Explore the fascinating scales of existence, ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy clusters, and dark matter.

Astronomy news today is packed with discoveries about the Sun, including tiny solar loops and hidden engines that drive solar ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

Scientists have discovered that the 3I/ATLAS — a Manhattan-sized interstellar object that potentially has alien tech — is much larger than previously thought.... First discovered by NASA on July 1, ...