Mercury takes only 88 Earth days to orbit the sun.

This axis of rotation is tilted 23.4 degrees away from the plane of Earth's orbit around the sun, giving us seasons. Whichever hemisphere is tilted closer to the sun experiences summer ...

Opposite the Sun, I can see all of the lit-up side. It's a full moon. It's going to carry on around the Earth, and I can start to see less of the lit-up side and you can see a quarter moon again.

Do you know how big the moon is? Or how many earths can fit inside the sun? The students at Potter Gray Elementary learned the answers and so much more about the solar system. The Orbit Earth Expo ...

As Earth moves through its orbit around the Sun, different parts of the planet ... so there's the North Pole - we're going to spin on our axis, but you see that the North Pole always gets sunlight ...

Just a sliver, or crescent, of the sun is visible, before Earth departs the outer space scene. Blue Ghost will spend 25 days ...

Lunar eclipses occur when Earth ... sun and the moon, casting a shadow across the lunar surface. Lunar eclipses can only take place during a full moon and are a popular event for skywatchers ...