Here in the United States, the 4th of July is a holiday. We celebrate the birth of our nation. It’s a holiday filled with fireworks and parties.
July 4th is also aphelion. This is the day of the year when the earth is at its farthest from the sun. Yet, even though we get 1.7% less [...]

June 20th was the summer solstice for people in the northern hemisphere. But what, exactly, is a solstice?
Formats available:QuickTime (.mov)
Tags: solstice, astronomy, science

It sure seems like the sun goes around the earth. In fact, for thousands and thousands of years, that is exactly what people thought. SkyGuy answers this question from Mina, who is five years old.