Ultradense quark stars, which mash together one of the universe's fundamental particles, may or may not be a physical possibility.
We all know about powerful supernova blasts — but compared to quasars and their brighter cousins, blazars, they're peanuts.
In the late 1990s, theoretical physicists uncovered a remarkable connection between two seemingly unrelated concepts in theoretical physics.
Jumping into the world of astronomy and physics as a career can seem daunting, especially for precocious high schoolers with a passion for the field.
You would think that electrons would be easy enough to describe — but a quantum-mechanical property called "spin" makes that task much less straightforward.
Albert Einstein's theory of general relativity suggests backward time travel is possible in some scenarios, but do those situations ever exist in our universe?
How do scientists know there's a mysterious substance called "dark matter" that dominates our universe? An astrophysicist explains.
During the total solar eclipse, skywatchers can see the corona: the hellish, mysterious outer atmosphere that NASA plans to probe in 2018.
We have historic — and surprisingly, prehistoric — records of celestial events going back thousands of years, including solar eclipses,
I suppose there is a small chance you'll miss the upcoming total solar eclipse as it crosses the United States on Aug. 21.
Let's say you're not lucky enough to find yourself along the narrow strip of totality during the coming solar eclipse on Aug. 21. Don't feel bad — you still may get a stellar view.
Learn all about pulsars — neutron stars that seem to blink on and off superfast — in the 16th episode of the astrophysics-explainer video series "We Don't Planet."