GCSE A* REVISION NOTES


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Earth, Moon and Sun

Earth

Eratosthenes

Rotation

Tropics – A region where the sun is directly overhead in the zenith at least once a year and lie between 23.5 N (tropic of cancer) and S (tropic of Capricorn).

Equator - Lies exactly between the Poles. The sun is directly above the equator twice a year on the equinoxes

Latitude –how far north or south you are measured in degrees from the equator

Longitude – how far east and west you are measured in degrees from the Greenwich meridian up to 180 degrees

Pole – The pole is a point on the earth at the axis of rotation

Zenith – The point directly above the observers head

Horizon – The furthest visible point of the Earth’s surface from the observer’s position

Meridian – An imaginary line intersecting the Pole to the observer’s zenith

Telescopes

Refractor

Reflector

 

Atmosphere

Benefits

Drawbacks

Blue Sky

Light Pollution

Wavelengths

Observatory locations

Van Allen Belts

Moon

Features

Apollo

Origin

The Sun

Rotation

Sun Spots

Features

Fusion

Wavelengths

Interactions

Lunar Phases

Eclipses

 

 

Time

Aurorae


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