If the Ring Nebula is about a light-year in diameter and expanding at a velocity of 15 km/s, typical of planetary nebulae, how old is it? (Note: To 2 digits of precision, 1 ly = 9.5 × 1012 km, and 1 yr = 3.2 × 107 s.)
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.