AS101 Midterm: Midterm Review
Document Summary
Only thing they have in common is that they lie in about the same direction as earth: most star names derive from ancient arabic, greek or latin. Angular size: an object"s angular size appears smaller if it is father away. Specifying locations on earth: when describing the sky, we must specify where on earth we are observing the sky from. We specify our location using latitude and longitude: latitude: angular distance of a place north or south of the earth equator, longitude: the angular distance of a place east or west of prime meridian. Friday, february 5, 2016: earth rotates through 360 degrees of longitude in a day. Western hemisphere: all points with the longitude between 0 and 180 degrees east of the equator lie in the eastern. Hemisphere: the celestial equator: a circle on the imaginary celestial sphere, in the same plane as the. It is a projection of the terrestrial equator out into space.
