ASTR 310 Final: Astronomy Study Guide 310
Document Summary
Light year: 300,000 km/s earth: spins counter clockwise, moon spins around earth in same direction. something is rising when its on your horizon spinning towards it order of planets: mercury, venus, earth, mars, jupiter, saturn, uranus, neptune. Aristotle: he viewed the earths shadow cast on the moon during the lunar eclipse and determined that because it is always curved regardless of our orientation the earth must be spherical. Little dipper: ursa minor, where polaris is located. Polaris: indicates north, earths rotation axis points here. The celestial sphere: believed the stars were attached to a sphere orbiting around us because they moved from east to west but stayed in the same location relative to us. We now know this is the earth rotating. Zenith: directly overhead from where you are, 90" from you to horizon. Focault pendulum: experiment that de nitively proves the earth is spinning.
