What’s Up!

“What’s Up?” articles are short stories about the cosmos appropriate in length for school and community newsletters. Browse the list of articles below and see if one can find a home in your local newsletter! In the articles presented here, you will find stories about eclipses on Earth, eclipses on other worlds, and interesting facts about the sun, the moon, and other star systems.

WHAT’S UP? Lunar Libration

Full moon. Image courtesy NASA Goddard Science Visualization Studio

Does the moon rotate on its axis? Many people would say no, because it  keeps only one face (or hemisphere) pointed at Earth at all times. But, in fact, in order to do this, it must rotate once for every orbit around the Earth it makes. You can demonstrate this with a friend. Try walking around your friend and not changing the direction of your face.