Earth is often described as a circle or an oval, but it is neither. As the planet spins more than 1,000 miles per hour at the equator, it develops a slight bulge around its middle. The result is what ...

When you look at photographs of Earth from space, the planet looks like a blue marble, with patterns of clouds lying on the surface of the marble. It seems as if Earth's atmosphere is incredibly thin, ...

While mid-October has been designated Earth Science Week around the world, every week is Earth Science Week at NASA. To mark its continuous dedication to studies of Earth’s land, sea and air, NASA ...

Earth's core cannot be made just of iron — it also appears to contain carbon. And our research suggests it may contain a bit of oxygen and possibly silicon as well. When you purchase through links on ...