Private companies launching humans into space is a profound game changer. We just need to follow it to its logical conclusion.

Astronomers looking into the orbits of Kuiper Belt objects may have found a flaw in data we thought pointed to the existence of a large planet beyond Neptune's orbit.

If we're going to explore space, we have to prepare for long periods of isolation and boredom. Can social distancing during this pandemic teach us how to deal with them?

Looking for dying civilizations huddling around a cooling ember of a star isn't just a depressing idea, it's shortsighted science that dismisses life's ability to invent and innovate.

When our sun becomes a red giant at the end of its life, will it really be able to warm the outer solar system enough for a new burst of life to emerge?

A new bill making its way through the U.S. House of Representatives wants to take a sledgehammer to the future of space travel for the benefit of one corporation.

When some stars die, they take their entire systems with them. Others appear to give their planets a fighting chance.

A new study sees evidence of more than a dozen galaxies that seem to lack dark matter and raises big questions about our ideas of galaxy formation.

Why do popular science news keep offering new theories about the basic shape of our universe every week?

According to sensationalistic headlines, the hypothetical ninth planet in our solar system is a tennis ball sized black hole. According to physics, it's far more likely to be literally anything else.

The long-debunked story of NASA buying ridiculously expensive pens is just too gratifying for some people to pass up.

The massive structure designed to capture the energy of an entire star envisioned by Freeman Dyson is popular in science fiction. But can we build it? And have alien civilizations tried a similar idea?

We know that black holes are bizarre. We know they exist. We even have a picture of one. But what exactly are they?

A new study shows just how little we know about why Venus became the hothouse world it is today.

By now, you're probably used to hearing about potentially habitable worlds orbiting other stars. But that "potentially habitable" part may come with more caveats than you might think.