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Jan
26
asked Contradict the expansion of the universe?
Jan
26
awarded  Supporter
Dec
30
comment The life course for a massive star from birth to death using the HR Diagram
thanks. this link is the only link that is good zebu.uoregon.edu/~imamura/122/lecture-8/UMS.html but in the middle it starts to confuse me regarding the HR diagram. do you have similar links? (& if someone could post an answer here that would be great) thanks.
Dec
28
asked The life course for a massive star from birth to death using the HR Diagram
Nov
12
comment How can I calculate moon phase and height?
the sun is high in the sky at the summer & low at winter, right? the same with the moon... i just don't understand what determinate its height.
Nov
12
awarded  Student
Nov
12
comment How can I calculate moon phase and height?
i want to understand the movement. i have stellarium for example but i didn't quite got it from it...
Nov
12
asked How can I calculate moon phase and height?