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Terms in this set (30)
Turning of a body about an axis running through it
the orbital motion of one body around another
circle on a sphere whose center is located in the center of the sphere
the axis of Earth's rotation
direction of the earths rotation
direction opposite to the earth's rotation
imaginary sphere of a very large radius,centered on the earth; the apparent sphere of the sky
the points on the celestial sphere that are directly overhead at the earth's poles
a great circle on the celestial sphere 90 degrees from the celestial poles. It divides the celestial sphere into northern and southern hemispheres.
Point on the celestial sphere opposite to the direction of gravity
opposite point from the zenith on the celestial sphere
Great circle on the celestial sphere of which zenith and nadir are the poles. In other words, great circle which is halfway 90 degrees from both zenith and nadir.
any great circle passing through the observers zenith.
the great circle on the celestial sphere that passes thru the north and south celestial poles and the observers zenith.
The line of zero degrees longitude which passes through Greenwich England. All of the longitudes are measured from this line.
intersection of the meridian and horizon which is directly underneath the north celestial pole.
The angular distance along the horizon measured clockwise from the north toward perpendicular to the horizon.
angular distance of a celestial object above or below the horizon measured along a vertical circle passing through the object.
Path of the sun and the planets
obliquity of ecliptic
angle of 23.5 degrees of earths rotation
(astronomy) the equinoctial point that lies in the constellation of Pisces
Occurs on or about September 22 when all parts of the Earth receive 12 hours of
June 21, when the sun is at its northernmost point
December 22, when the sun is at its southernmost point
Astronomical meridian or the semi circle on the celestial sphere whose end points are located at the celestial pole
Angle measured eastward (-) or westward (+) between the observers meridian and the hour circle of the celestial object. It is expressed in hrs, min, and sec of time
(astronomy) the angular distance eastward along the celestial equator from the vernal equinox to the intersection of the hour circle that passes through the body
A measure of how far north or south an object is from the celestial equator
They are measured in North or South degrees.
East to west
North Pole 90 degrees North latitude and south pole 90 degrees south latitude
E or West
North and South
Green Which Meridian 0 longitude
north and south poles