The first views of 4.5-billion-year-old asteroid Bennu samples collected in space and recently brought reveal water and high-carbon content.

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?

Severe space weather events, especially in overcast conditions in autumn, hinder birds' ability to migrate at night, a new study shows.

The European Space Agency’s Gaia mission has released a goldmine of knowledge about our galaxy and beyond. Among other findings, the star surveyor has

Many people are gardening on land that is not theirs – here are some things to consider to avoid getting into trouble.

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.