Cosmic microwave background radiation - leftover heat of the big bang, Redshifting - other galaxies moving away, Nebula - gas cloud in space, Protostar - baby star, Main sequence - our sun, Red giant - what our sun will turn into, Density - what a star's evolution depends on, Jovian - gas giant, Moon - natural satellite of a planet, Asteroid - found between Mars and Jupiter, Meteoroid - a rock floating freely through space, Meteor - a rock in a planet's atmosphere, Meteorite - a rock that lands on a planet's surface, Comet - icy rock that orbits the sun, Solar eclipse - when the Moon is in between Earth and Sun, Luna eclipse - when the Earth is in between Moon and Sun, Waxing - moon growing in size, getting brighter, Waning - moon shrinking in size, getting duller, Latitude - north and south of equator, Longitude - east and west of prime meridian,

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