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Pre-Telescopic astronomy facts

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Philippines

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Pre-Telescopic astronomy facts

by MONTEFALCON, Lady Cheyenne D.
1

Which Greek philosopher argued Earth is spherical due to lunar eclipse shadows being round?

2

How did Aristotle use stars to show Earth is round?

3

Eratosthenes measured a 7.2° shadow in Alexandria; distance to Syene was 5000 stadia. What did he calculate?

4

Which reasoning best explains Eratosthenes’ observation of different shadow angles in two cities shows Earth is curved?

5

Which civilization made a 365-day calendar and watched Sirius to know when the Nile floods?

6

Why did ancient people watch the Sun’s yearly path in the sky?

7

How did Polynesian sailors find direction at night?

8

How does a solar eclipse happen?

9

Why does retrograde motion happen in the Copernican model?

10

Planets move faster near the Sun and slower far away. Which law is this?

Feedback

Aristotle argued the shadow on the Moon is round in lunar eclipses, indicating a spherical Earth.

Changing star altitudes with latitude suggested a curved surface.

Using angle and distance, he estimated Earth’s circumference.

If shadows differ at the same moment, surface curvature is implied.

Ancient Egyptians linked Sirius and Nile floods to calendar and agriculture.

Solar annual path helped farmers know planting and harvest times.

Stars served as celestial navigation guides for voyaging.

Solar eclipses occur when the Moon’s shadow falls on Earth.

As Earth overtakes outer planets, they seem to retrograde.

Planetary speed varies with area swept; faster near the Sun.

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