1. The basics

What is an exoplanet?

Travel into deep space in search of strange and unusual planets that lurk beyond our solar system, known as exoplanets. Are you a junior explorer or a rocket scientist? Take our exoplanet quiz and find out how you rank!
What is an exoplanet?
What is the name of our home galaxy, which includes the Sun, Earth, Mars and all of the known exoplanets?
How big is our galaxy?
If you were to "browse planets" in Eyes on Exoplanets, which weird gas-giant exoplanet is shaped like an egg?
How many types of exoplanets can you search in Eyes on Exoplanets?
How many space telescopes, called missions, can you search in Eyes on Exoplanets?
How many planets found by the TESS space telescope have been confirmed?
Can you compare the size of the Hubble Space Telescope to a school bus? Or to a human scientist in Eyes on Exoplanets? (Tip: "Missions" is full of information!)
There are many types of exoplanets. What is a Super-Earth and how many have been discovered?