P7 - Observing the Sky
- Created by: Tash
- Created on: 22-05-13 11:13
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- P7 - Studying the Universe
- Observing the Sky
- Sidereal Day
- Time taken for the earth to rotate 360 Degrees - 23 hours and 56 minutes
- Time taken for a star to return to the same position in the sky - 23 hours 56 minutes
- Solar Day
- Time taken for the Earth to fully rotate to exactly face the sun again. The sun appears in the same position in the sky - 24 hours
- The Moon
- Goes slower than the sun. Takes around 25 hours to appear in the smae position in the sky.
- Reflects light from the sun. We see different patches of light and dark.
- Full moon - Whole half we can see is lit up.
- New moon - When the dark half faces us
- Stars
- An Earth year is the time it takes the earth to orbit the sun once.
- Same day each year - you should be able to see the same stars in the night sky.
- An Earth year is the time it takes the earth to orbit the sun once.
- Eclipses
- Solar Eclipse
- The earth is 400 times smaller than the sun and 400 times the distance away. When it passes into between, it blocks the light from the sun.
- Lunar Eclipse
- The Earth passes in between the Sun and the Moon. No light reflected from the moon so it "Disappears"
- Solar Eclipse
- Sidereal Day
- Observing the Sky
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