While Mars today only has a wispy remnant of an atmosphere, it may once have had one hundreds of times thicker with a ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely visible in the sky.

A sci-fi idea is gaining supporters, from billionaires to city councils. Whether it's feasible is another matter.

A team of scientists has investigated how Earth’s twin became so inhospitable, and whether the same will happen to our planet ...

Do we know what space actually smells like? And what about other planets, moons, and celestial bodies? Here's what the ...

Lasers aren't just useful for entertaining cats or pointing out features of PowerPoint slides. They can also drill holes on ...

Saturn will make a particularly brilliant appearance amongst the stars this weekend, according to the Royal Observatory’s night sky highlights for September. It will appear so brightly, that the ...

A detailed study of a cosmic mystery known as "The Accident" has now provided new insight into the formation of clouds on ...

Astronomers have discovered the raw ingredients of planets orbiting two infant stars, offering a glimpse into how new worlds ...

Who hasn't looked into the sky and wondered if there's life out there, somewhere, looking back at us? Is it possible there's ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

Federal funding is about to run out for 19 active space missions studying Earth's climate, exploring the Solar System, and probing mysteries of the Universe.