Missions
Missions
Short challenges that test what you've learned. Start with the one below.
Mission 01
Solar System Speed Run
Learn the eight planets in order, then prove it without peeking. 5–10 minutes.
Mission 02
Planet Hunter
Read a star's light curve: the dip is the planet's size, the gap is its year, the year says hot, cold or just right. Five planets against the clock. 5–10 minutes.