Astronomy (Full version) in 10 minutes.

It measures your understanding of astrophysics concepts like celestial mechanics, planetary thermodynamics and stellar evolution. It suits learners, curious readers and anyone preparing an astronomy exam who wants a structured self-check.

There are Easy, Intermediate and Expert levels, each with Short (10 questions, 3 minutes) or Full (30 questions, 8 to 10 minutes). Choose Short for a quick overview or Full for a more precise score.

Revise precise space terminology such as planetary rotation, orbital points and lunar phase descriptions. Practise timed multiple-choice reasoning and use the optional Hint when stuck; it gives a method tip and does not lower your score.

It gives correct answers out of total and a band based on share: below 40% Needs work, 40% Intermediate, 60% Advanced, 80% Expert only at Expert level; other levels top at Advanced. Passing needs 6 out of 10 or 18 out of 30.

You can retake as often as you like with Start again; the questions are the same and in the same order, so a retake mostly measures memory. Rankings use only your best attempt: highest score, then shortest time.

Your detailed result, corrections and certificate are visible only to you. Unlocked results also appear in public rankings, showing first name, last-name initial, country, city, score and time, filtered by test, country and city.

A passed test earns a PDF certificate with first and last name, score, date, a certificate number and a QR code that opens a verification page. It is attached to the result email and downloadable from the account.