New Horizons just completed its first successful stellar navigation test in deep space, a groundbreaking moment for ...

The newly discovered interstellar visitor is just the third of its kind and fascinates astronomers who hope to learn from it ...

Solar systems mostly keep to themselves. What’s ours is ours and what’s not is not. Stars are simply too far from each ...

The space agency spotted the quick-moving object with the Atlas telescope in Chile earlier this week, and confirmed it was a ...

Astronomers manning an asteroid warning system caught a glimpse of a large, bright object zipping through the solar system ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

But an international team of astronomers have detected the unmistakable signature of a gas giant planet orbiting the ...

Planetariums were a hit with the public. Within decades, they had spread around the world – the first planetarium in the ...

Newfound interstellar object 3I/ATLAS may be carrying pristine material from early in the Milky Way’s star-forming history.

A fluffy, Jupiter-sized planet may be triggering deadly flares from its star, leading to the slow destruction of its own ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...