Astrophysics Exam 1

Question	Answer
Celestial Sphere	A sphere centered on Earth's center that represents the universe
Horizon	A local tangent plane that moves wight he observer
Zenith	The point directly above the observer
Nadir	The point directly below the observer
Latitude	Varies from 0 to 90 North or South
Longitude	Goes from 0 to 180 East or West
Horizon Coordinate System	Uses altitude and azimuth, where the horizon circle is the equator extended to the celestial sphere and the prime meridian connects the zenith, nadir, and the point on the sphere due north of the observer
North/South celestial poles	Projections of Earth's north and south poles onto the celestial sphere
Spherical Coordinates	Uses celestial poles and the vernal equinox to define the prime meridian with the celestial equator
Celestial Equator	Projection of the Earth's equator onto the celestial sphere

Resource summary

	Created by adkpeter1 about 9 years ago