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2 votes
0 answers
172 views

When did we have first calculations of moon phases?

3 votes
2 answers
200 views

Where are the mirrors of historic telescopes today?

3 votes
1 answer
1k views

What did the ancient Greeks know about the solar system, and how?

12 votes
6 answers
653 views

Has science fiction ever caused scientists to do real research?

4 votes
1 answer
118 views

How does Copernicus explain the discrepancy from "On the Revolutions of the Heavenly Spheres" Book 5. chapter 16

1 vote
3 answers
89 views

Why does Eratosthenes method for calculating the circumference of the Earth requires the city of Alexandria and Syene to be in the same meridian?

10 votes
1 answer
3k views

Did Indian astronomers realize the sphericity of the earth independently of the Greeks?

5 votes
1 answer
3k views

When was the mechanism behind seasons on Earth discovered

3 votes
1 answer
112 views

Why was Principia Proposition 43, Theorem 22 not published?

8 votes
2 answers
2k views

First to realize that seasons were reversed above and below the equator?

1 vote
0 answers
75 views

Historical proofs of the series expression for the Bessel function of the first kind

1 vote
1 answer
156 views

Was religion not present at all in the Astronomy of the Ancient Greeks?

26 votes
2 answers
2k views

What attracted Einstein to the anomalous precession of Mercury?

1 vote
2 answers
152 views

Comparison of the accuracy of the Ptolemaic and Copernican models

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