How is the total mass of the universe calculated? Bob GiddingsGreen Bay, Wisconsin Calculating the total mass of the universe ...

The universe exists because matter and antimatter are not good friends. Is there a scientific reason why the universe exists?

Knowable Magazine reports that neutrinos may help explain the universe's missing antimatter, shedding light on ...

If you think a galaxy is big, compare it to the size of the universe: it's just a tiny dot which, together with a huge number ...

The oldest and most distant black hole known to scientists dates back 13.3 billion years ago, when our universe was still in ...

Let me first tell you how mysterious dark energy is. Einstein added a cosmological constant to his equations to keep the ...

No one knows what kicked off the Big Bang that eventually allowed the stars to begin forming. Adolf Schaller for STScI, CC BY How can a Big Bang have been the start of the universe, since intense ...

For scientists, learning more about how black holes behave is essential to understanding how the universe works. A recent ...

"It's an elegant answer, really, because we thought it was a tiny galaxy full of many separate cold stars, but it's actually, ...

Scientists ultimately settled on a feeding black hole at the heart of a far-distant galaxy as the most likely engine for 3C ...

Astronomers using the Webb Telescope may have found a new type of object: cold, glowing black hole stars from the early ...