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 ...

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 ...

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

Here’s what you’ll learn when you read this story: Mathematical evidence indicates that our universe is flat, but it could be infinitely big, as well. You can figure out if an object is flat with a ...

Some astronomers think one set of measurements or the other will turn out to be wrong. Others believe that the tension is a hint of deeper problems with the scientific description of the universe, ...

“The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos to know itself.” - Carl Sagan Compared to the Sun, how big is the Earth? What is a scale model and how does it help ...

The Big Bang Theory is a popular sitcom that has kept us entertained with its quirky characters and scientific humor ...

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

Watch Pop Mech ’s Jackie Appel reveal the story of how two men from New Jersey named Arno Penzias and Robert Wilson made one of the most important discoveries in the history of astronomy—by accident.