This was a very interesting week in astronomy. What amazed me the most was how the agent Greek philosopher, Eratosthenes, used geometry to calculate the size of the Earth. Wow! That is just so amazing; especially knowing that in those days to most people the earth was flat.
I am also fascinated what techniques we are using to measure the distance to the sun. Since we can’t use modern gadgets such as radar waves or any other wave we have to use tricks. Fascinating!
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