The time taken for a star to return to the same postion in the sky- 23hours 56minutes.
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what is a sloar day?
The time taken for the sun to appear at the postion in sky. its 24hours
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Why are solar days different to sidereal days?
Solar days are 4 minutes longer. This is because the earth orbits the sun as well as it spinning on its axis in the same direction. So the earth needs to spin slightly more than 360 for the sun to appear at the same postion in the sky.
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Why do we see different stars at different times of the year?
As the eath moves around the sun, the direction we face changes slightly each day. This means we see a slightly different patch of sky each night-we see different stars.
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What is a earth year?
The time taken for the earth to orbit the sun once, so on the same day each year you should be able to see the same stars in the night sky.
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Other cards in this set
Card 2
Front
what is a sloar day?
Back
The time taken for the sun to appear at the postion in sky. its 24hours
Card 3
Front
Why are solar days different to sidereal days?
Back
Card 4
Front
Why do we see different stars at different times of the year?
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