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Card 6

Front

Explain what a lunar eclipse is.

Back

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Card 7

Front

Explain what a solar eclipse is.

Back

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Card 8

Front

Why don't total eclipses happen very often?

Back

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Card 9

Front

What is the pole star?

Back

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Card 10

Front

What is the celestial equator?

Back

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Card 11

Front

What are the two angles used to measure postions in the sky?

Back

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Card 12

Front

Explain retrograde motion.

Back

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Card 13

Front

What planets can we see from the 'naked' eye?

Back

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Card 14

Front

What happens when the speed of light changes?

Back

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Card 15

Front

What happens if a light wave hits a boundary 'face on'?

Back

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