CURRICULUM

Solar System: Four Difficulties, 4000 Levels

Solar System has four difficulties with 1000 levels each and ten questions per level; picture the object's position and features before choosing. Solar-system levels ask for planet order, moons and small bodies; place the object before choosing. The bank is small, so repetition builds a stable mental map.

太阳系基础闯关Solar System Basics1000 关太阳系进阶闯关Solar System Intermediate1000 关太阳系高阶闯关Solar System Advanced1000 关太阳系挑战闯关Solar System Challenge1000 关

How it works

  1. Start at the basic difficulty.
  2. Ten questions per level; clear one to unlock the next.
  3. Review at 1/3/7/14/30 days.

FAQ

Which difficulty?

Start at basic and move up when accuracy stays above 80%.

How many levels each?

1000.