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Science lesson 4
vocab
Term | Definition |
---|---|
polaris | the polestar or North pole, a star of the second magnitude situated close to the north pole of the heavens, in the constellation Ursa Minor: the outermost star in handle of the little dipper |
latitude | distance north or south from the equator measured in degrees |
longitude | distance measured by degrees or time east or west from the prime meridian |
ellipse | an oval-shaped closed curve: the shape of a planet's orbit |
summer solstice | the solstice on or about June 21st that marks the beginning of the summer in the Northern Hemisphere |
winter solstice | the solstice on or about December 21st that marks the beginning of winter in the Northern Hemisphere |
equinox | the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 |