Train for your astronomy olympiad.

Real past questions from USAAAO, IAAC and BAAO. Practice by topic, get feedback on free-response work, and watch your accuracy climb.

How training works

Three steps, in order. Most students start at step one and are practicing within a few minutes.

Pick your competition
9 olympiads, ranked from beginner-friendly to international. Find the one that fits where you are now.
See the olympiad guide
Practice by topic
Search past questions by competition, year, topic and difficulty. Bookmark the ones you want to revisit.
Open the question bank
Get feedback that teaches
Every multiple-choice answer comes with an explanation. Free-response work is graded part by part against the real marking scheme.
Try free-response practice

734 past multiple-choice questions with source attribution, filterable by competition, year, topic and difficulty. Try today's:

★ Question of the day

MCQBeginnerMath, Data & Coordinates

USAAAO 2016 · Question 31

To which constellation does your previous response belong?

Every question is tagged by topic:

Type it, photograph it or upload a PDF. Each part is scored on the competition's own point values, with the official solution unlocked as you work.

Accuracy, bookmarks and the questions you got wrong, so you always know what to practice next.

Earn 18 badges as you practice — streaks, night-owl sessions, every competition and more.Start collecting

The question bank is free. You can try a question right now without an account, and sign up when you want your progress saved.