I am new to astronomy, though really interested in it
Just read up on stellar evolution from multiple sources, but have some questions about it
Let me summarize the theory of stellar evolution
1. gas clouds collapse due to multiple mechanisms, e.g. shock wave, collision of clouds...
2. the...
I guess many have watched the lunar eclipse last night
I was just thinking about the duration of a lunar eclipse on my way home
sun-to-earth = 1.5x10^8 km, moon-to-earth = 384400 km
R(Earth) = 6378 km, R(Sun) = 6.96x10^5 km, R(Moon) = 1378 km
Moon's period around Earth = 27.3 days
x /...