P7 Physics - Observing the universe = P7A Naked eye astronomy

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  • Created by: Charlotte
  • Created on: 02-06-11 18:13

Key terms and defintions you need to know, i hope this helps :)

Time it takes for the earth to rotate once about its axis = 23 hours 56 minutes.

Time for the earth to complete one orbit of the sun = 365 1/4 days

A solar day = 24 hours

time for the moon to move across the sky once

Comments

Husna

umbra = when the earths full shadow falls on the earth, a total eclipse is seen.

What? How can the earth's shadow fall on the earth?

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