Measure a Day on Jupiter
Investigate Day and Night
On Earth, night follows day and day follows night. But why?
Complete this fun investigation to find out!
Measure the Sun's Rotation
Why Do Shadows Change Over Time?
Have you noticed that your shadow changes over time? The cartoon on this page shows why shadows change during the day.
Explore Day and Night Around the World
Do different parts of the world experience day and night at the same time? Why do parts of the Earth have seasons? What are days and nights like at the north and south poles?