Expert Voices

I think it's time for everyone to admit that black holes are annoying.

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.

The Sun Is Literally Boiling, Releasing Balls of 'Hot Horror' Into Space

During the total solar eclipse, skywatchers can see the corona: the hellish, mysterious outer atmosphere that NASA plans to probe in 2018.

During my mission aboard the International Space Station (ISS), I shot what I was told was the first astronaut video of a partial eclipse.

There's a lot we don't know about the sun — including how its outer atmosphere gets so hot.

In the 1690s, astronomer Edmund Halley had a problem.

By all accounts a total solar eclipse is a life-changing event. I wouldn't know, I've never seen one. Fortunately for me and millions across the U.S., that will change this summer.

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.

If the moon typically rises in the east, why will the 2017 total solar eclipse begin in the west?

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.