Expert Voices Paul Sutter: Explaining astrophysics and astronomy

A pair of astronomers have proposed two new strategies for preventing possible asteroid impacts.

The earliest and most momentous epoch in the history of the universe released a flood of gravitational waves, tiny ripples in the fabric of space-time.

A wild variety of star systems exist in the nearby regions of the Milky Way, and astronomers are eager to know where they might find an "Earth 2.0."

With its frigid temperatures, remoteness from the sun and general dustiness, changing Mars to be more Earth-like is more challenging than it seems (and it already seems pretty tough).

Astrophysicists say our universe might be shaped like a three-dimensional donut, meaning you could point a spaceship in one direction and eventually return to where you started.

Despite numerous attempts, astronomers have not yet confirmed the detection of an exomoon, a moon orbiting a planet around a distant star.

Theories that attempt to resolve the so-called black hole information paradox predict that black holes are much more complicated than general relativity suggests.

If you'd like to "bake" a universe, you need two essential ingredients and one optional ingredient.

New research shows how a hypothetical form of dark energy might be made inside the sun and could be detected here on Earth. In fact, we may have already seen it.

The supermassive black hole in the center of our galaxy may not be a black hole at all, but rather a fluffy ball of dark matter called darkinos.