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

Atmospheric refraction delays the perceived setting of the Sun relative to distant background stars Earth advances approximately 1° along its orbit around the Sun each day, requiring an extra ~4 minutes of rotation to realign with the Sun Tidal braking from the Moon's gravitational pull slows down Earth's rotation during daylight hours Earth's orbital velocity increases as it moves from aphelion to perihelion according to Kepler's second law