The atmosphere is a reflection of extreme conditions on the super-heated planet.

An astronomer explains why space looks so dark despite containing 200 billion trillion stars.

Studying the sample could help answer how water arrived on Earth and how life started.

Controlled experiments are impossible in astronomy, as are direct measurements of physical properties of objects outside our solar system. So how do astronomers know so much about them?

The discovery provides a way to study the birth of an entirely new planet in real time.

There’s a flurry of excitement every time a comet comes into view from Earth. But what are these celestial objects, and where do they come from?

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.

India’s Chandrayaan-3 rover has found sulfur on the Moon’s surface at higher concentrations than previously seen. Sulfur, a useful resource, could pave the way for future Moon bases.

Space can damage everything from your cardiovascular and nervous systems to your mental health – long voyages can feel isolating for many.

Months after a military officer made sensational claims about unexplained objects in the skies, NASA released a report loosely outlining a scientific approach for analyzing UAP reports.