AS101 Study Guide - Carbon Cycle, Orion Nebula, Curve
Document Summary
Indirect source of almost all energy on earth. Cosmos: all of the order in the universe. Sun, mercury, venus, earth, mars, jupiter, saturn, uranus, neptune. The sun is a massive ball of gas that generates energy through nuclear fusion. Exoplanets: over 900 planets confirmed to be orbiting other stars, thousands of candidate exoplanets observed by kepler telescope. Star: globe of gas held together by its own gravity and supported by the internal pressure of its hot gases which generate energy by nuclear fusion. Stars rise 4 min earlier each night, stars rise 2 hours earlier per month. Stars rise and set like the sun, they are up in the day we can"t see them. Sidereal day: time between successive meridian crossings for any other star (23h 56m) Northern hemisphere stars never appear to set, located near a point called ncp north celestial pole. These are circumpolar stars because they appear to circle the pole and never set.
