OBA Practice Questions - 29a Olimpíada Brasileira De Astronomia E Astronáutica - 2026 Exam

The Sun reaches its maximum altitude of exactly 90° (zenith) at solar noon from every latitude on Earth The Sun remains continuously above the horizon for 24 hours at both the North and South geographic poles The Sun rises due east and sets due west, with day and night each lasting approximately 12 hours The shadow cast by a vertical gnomon at local solar noon completely disappears across the entire Southern Hemisphere