We've known for about 20 years that the expansion of our universe is accelerating, but how does the dark energy that causes it work?
Paul Sutter received his Ph.D. in Physics from the University of Illinois at Urbana-Champaign in 2011. After spending three years at the Paris Institute of Astrophysics, he is now a visiting scholar at the Ohio State University's Center for Cosmology and Astro-Particle Physics. Sutter is the host of several podcasts and YouTube series, consults for TV and film productions, and frequently makes public appearances discussing physics and astronomy topics and the role science plays in society.
Space is an amazing physics laboratory, because we can see stars and other objects behaving under extreme conditions.
When stars explode, they generate light that you can see across the universe, and they hold a key to measuring how the universe grows.
Entanglement is one of the most confusing aspects of quantum mechanics — a field of physics that isn't exactly known to be clear-cut, sensible, common-sense or easy-to-understand.
The Milky Way is on a collision course with an even bigger galaxy, known as Andromeda. Should we be worried?
In the latest installment of "Ask A Spaceman," astrophysicist and Space.com columnist Paul Sutter explains why trying to use a wormhole is a really bad idea.
Why are black holes so hard to study? Astrophysicist Paul Sutter digs into this question in a new episode of "Ask a Spaceman."
This week's "Ask A Spaceman" episode explores the radiation echo of the Big Bang that formed our universe. While we can't see it with our eyes, this radiation surrounds us everywhere.
Our baby universe comes under scrutiny in the latest episode of "Ask A Spaceman", which airs on Facebook Watch today (Aug. 22).
"Ask a Spaceman" is live for the first time on Facebook — and astrophysicist Paul Sutter jumps right into it with a trip to Pluto.
The astrophysicist is in: In the new Facebook Watch series "Ask a Spaceman," pro explainer (and Space.com columnist) Paul Sutter answers your questions about the strangest corners of the universe.
As good skeptics, we shouldn't immediately believe general relativity's tangle of mathematics at first blush. Instead, we need evidence. Good evidence.
Albert Einstein's theory of general relativity is a monumental achievement of human ingenuity, creativity and perseverance — to say the least.
Mysterious creatures called magnetic monopoles are predicted by our theories of the universe — so why has nobody seen them?
Deep in the sun's core, buried under hundreds of thousands of miles of twisting and convecting hydrogen and helium, a nuclear fire rages.