Investigate Day and Night

Short Intro Text: 

On Earth, night follows day and day follows night. But why?

Complete this fun investigation to find out!

Count the Stars!

Have you ever wondered how many stars you can see in the night sky? Did you know that the number you can see depends on where you are?

The silhouette of 3 children looking up at a starry sky

Kepler's Laws: Find the Mass of the Sun

Many years ago, a mathematician named Johannes Kepler created a set of rules explaining planets' movement in our Solar System.

The picture shows a cartoon portrait of Johannes Kepler in front of an artist's impression of the Solar System.

Create An Expanding Universe

You have likely heard about the Universe expanding. Or that redshift can tell us about the movements of galaxies. Both are difficult ideas to imagine and understand.

Cartoon of a person blowing up a balloon. The balloon is covered with galaxies.