International Astronomical Union
Question 1 out of 5

Q: In honor of its hundredth anniversary, the International Astronomical Union is allowing each country in the world to name an exoplanet in the universe. What is an exoplanet?

Select your answer:
A. A planet with at least two moons
B. A planet that orbits a star outside of our Solar System
C. A planet that can sustain life
D. A planet with no moons