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Space Celestial object Sun first four are terrestrial planet the closest to the sun Mercury Venus the last four are the Jovian planet Earth Mars the last four are the furthest away from the sun Jupiter Saturn Uranus Neptune Red shift Star When its moving further away from the earth Shows universe expanding Less compressed Blue shift Moving towards the earth Less likely to happen Shows the universe is coming together More compressed Big Bang One theory of how the universe was formed Started out as a dot Got bigger and bigger Expands very fast Start as a star Then develops as the galaxies Elliptical, irregular, spiral galaxies Solar system, Milky Way, galaxy, universe. Life cycle of stars 1. 2. 3. 4. Nebula Protostar Main sequence star Red giant 4B. Super giant 5a. Planetary nebula 5b. Super nova 6a. White dwarf 6b1. Black holes 6b2.Neutron star Rotation Revolution- movement of a planet of other body orbiting another. Rotation- spinning of a planet or other body axis. Axis- imaginary line through the center of a planet of other body around which the body spins. Earth revolves around the sun once every 365 ¼ days counter clock wise. Moon revolves around the earth every 27 1/3 days. 15 degrees per hour---time zones (24 time zones)----day and night The moon rotates around its axis in 27 days. The earth rotates around in 24 hours, but revolves around the sun in 365 days. In the earths rotation its takes 24 hours but has time zones