Orbits
An orbit is the path an object in space travels around another. Lots of objects in the Universe orbit others. The Moon orbits the Earth.
- Why do orbits happen?
Orbits happen because of gravity and something called momentum. The Moon's momentum wants to carry it off into space in a straight line. The Earth's gravity pulls the Moon back towards the Earth. The constant tug of war between these forces creates a curved path. The Moon orbits the Earth because the gravity and momentum balance out.
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.
How Do Satellites Stay In Orbit?
A satellite is an object which orbits another. An orbit is the curved path that an object in space takes around another object.
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?
Explore Day and Night
Rockets Quiz
Rockets are used to send astronauts, spacecraft, or equipment to space. They are a vital part of space exploration and research. But how much do you know about how rockets work?