STEM Challenges

Despite the advantages of space, the world's best ground-based observatories are scientific powerhouses in their own right. Explore the giant telescop...

The James Webb Space Telescope is the most powerful observatory ever built and launched. Learn how this extraordinary machine works, where it is, and ...

Putting telescopes in space changed astronomy forever. Discover the famous observatories that look at the universe in visible light, X-rays, infrared,...

Astronomers use many different types of telescopes to study the universe across the full electromagnetic spectrum. Explore how refractors, reflectors,...

The naked eye can only show us a tiny fraction of the universe. Discover why telescopes revolutionized astronomy, what Galileo saw when he first point...

Now that you have explored each world individually, pull it all together. How do the eight planets stack up against each other in size, density, moons...