The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

NASA is using its human spaceflight experience on the space station to figure out what types of medical events happen in ...

What did Newton understand that was such a revolution? Can someone just... explain gravity to me? Let's start with a ...

In the coming years, an unprecedented number of people will leave planet Earth—but it’s becoming increasingly clear that deep ...

Gravity also acts between the Moon and the Earth and keeps the Earth in orbit around the Sun. The force that pulls things to the centre of Earth (and other planets) is called gravity. Gravity also ...

A new study has revealed that gravity’s effect on Earth is constantly shaping the surface of our planet. When our planet formed, it did so by pulling dust and rock toward its gravitational field.

Mars will be making its closest approach to Earth in two years, and thus, the mighty red planet, named for the god of war himself, will appear brighter, bigger, and bolder in the night sky.

The Sun sets differently on Mars. Part of that is due to its distance from the star (an average of 142 million miles versus ...

A recent video created from images captured by Curiosity shows clouds tinted red and green flowing though the sky over Mars.

From its peculiar reddish colour, to whether life ever existed on Mars, NASA has unlocked several secrets of the red planet over the decades. Check out these 7 stunning NASA images of Mars that reveal ...