Every Astro Challenge question from 2016 to 2024 — 90 multiple-choice and 36 short- and long-answer questions — with figures, sorted by astronomy topic. Filter and search, or read straight through a topic. Multiple-choice questions reveal the answer letter; written questions reveal their final results.
Filter all 126 questions by section, year and topic, or search the text. Answers reveal on click.
Open the search view → Read · 按主题One page per topic: the sky and positional astronomy, orbits, the Solar System, telescopes, stars, galaxies and cosmology, exoplanets, relativity, space missions.
Browse topics →Answers only. Full worked solutions: BAAO Astro Challenge: Complete Solutions (book).