The Earth started as a mixture of gas and dust around the Sun and grew as it collided with asteroids and dust particles.

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

Up to 50 'shooting stars' per hour will streak through the night sky when the Eta Aquariid meteor shower peaks just before ...

Astronomers used the James Webb Space Telescope for the largest and deepest sample of galaxy groups, some of which were up to ...

However, some astronauts said they were far from lonely when cruising through the abyss of space. Michael Collins, who ...

The space-based observatory will scan the cosmos in 102 colors we can't see to unlock the secret history of the universe.

Halley’s comet swings near Earth every 75 years. But debris left by the comet leads to two major meteor showers every year ...

Pointed away from Earth about 404 miles overhead, the orbital observatory will circle the planet from north to south about 14 ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

At 300 light-years away, the interstellar cloud is the closest of its kind ever found to Earth and the largest apparent single structure in the sky.

Did you know that Canadian feet were actually the first to touch down on the Moon during the Apollo 11 mission?

An astronaut who missed out on the first all-female spacewalk because of a spacesuit sizing issue got her chance six years ...