As twilight fades to night these May evenings, Mars stands out in the northern sky. It begins the month near the center of ...

The top half of the Earth we call the northern hemisphere, and the bottom half we call the southern hemisphere. At this point in the orbit, the Earth’s tilt means that the southern hemisphere is ...

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 ...

This video identifies the seven continents and five oceans of the Earth, and also where the Equator, Northern and Southern Hemispheres and ... could use a base map to explore the make up of ...