This diagram illustrates the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange). PHAs are a subset of the near-Earth asteroids ...

While we can't see deep into the Earth, geologists have a variety of neat tricks to create a picture of our Earth's layers. Just like a kid's jawbreaker, Earth consists of layers that differ in ...

This artist’s impression shows the super-Earth exoplanet GJ 1214b passing in front of its faint red parent star. The exoplanet, orbiting a small star only 40 light-years away from us, is about 2.7 ...

This artist's concept shows the super-Earth planet 55 Cancri e. It's a toasty world 41 light-years from Earth that rushes around its star every 18 hours. This plot of data from NASA's Spitzer Space ...

The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in different parts of the Earth’s structure. The crust is made from enormous plates ...

Gravity is pretty complicated if you think about it. The motion of a ball falling on the surface of the Earth is caused by the same interaction as the moon orbiting the Earth. That's crazy. It's even ...