If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Spherical Trigonometry — quick quiz

5 real NSEA questions on Spherical Trigonometry. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 2

HARD

Two stars have right ascensions α₁ = 2h and α₂ = 8h, and both have declination δ = +30°. What is the angular separation between them on the celestial sphere?