Expert Voices

All four outer planets in our solar system sport at least a few rings, but so far, we haven't observed any such features around exoplanets. That's confusing.

String theory is a purported theory of everything that physicists hope will one day explain … everything.

A dark web ties the universe together. Now, we can see it.

But also super-mysterious.

Life for the 19th-century astronomer was kind of monotonous, 200 years after Galileo's revolutionary work with the telescope.

These supremely stable particles could explain dark matter.

Sometimes the forming star swallows up a huge amount of matter, resulting in a burst of activities in the massive star.

It was a big moment for our cosmos when the first stars awoke, but it's an elusive one for scientists.

As with any major human exploration, there will be a number of obstacles to overcome when we send people to Mars.

The world of the teensy-tiny, the quantum realm, could have a favorite flavor. Here's why that's a big deal.

Alien life is out there, but our current theories seem to be steering us away from it, says this scientist.

Alien lifeforms are impossible to spot.

String theory is a powerful idea, unfinished and untested, but one that has persisted for decades despite inauspicious beginnings.

Rush's Neil Peart passed away on January 7, 2020 but his words and music live on.

What if I told you that our universe was flooded with hundreds of kinds of nearly invisible particles and that, long ago, these particles formed a network of universe-spanning strings?

Researchers recently released simulations of the Large Magellanic Cloud — a satellite galaxy of the Milky Way — and found that cosmic rays from a starburst event are starting to rip it apart.

For the last decade or more, Muggles around the world have been busy designing and perfecting a similar device called a coronagraph.

It all goes back to the origin of the word "planet."