Nicolaus Copernicus was a polish astronomer known as the father of modern astronomy
B Stalin's five year plans in the Soviet Union
It's 10 points, not 20. also, this isn't how Brainly should be used. Brainly isn't a "do my homework for me" website, it's a "help me with my homework" website. What you should do is research and write on your own, and ask for help/guidance with it on here
“A calendar was needed in the first place to track seasons. ... The progression of seasons ensured that there were 12 months in a year. Since the lunar cycle is shorter than 30 days, an extra month was added once every few years to keep calendars in sync with the seasons.” Need more explanation? Can you please mark me Brainliest?
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