Chapter22:Origin of Modern Astronomy
Terms in this set (22)
The study of the moon, stars, and other objects in space
A model of the universe in which Earth is at the center of the revolving planets and stars.
The path of an object as it revolves around another object in space
Based on the belief that the sun is the center of the universe
The apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.
A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant, or resulting when a cone is cut by an oblique plane which does not intersect the base.
the average distance between the earth and the sun
CIRCULAR MOVEMENT AROUND AN AXIS
The movement of an object around another object
A slow motion of Earth's axis that traces out a cone over a period of 26,000 years
orbital point nearest the sun
point in a planet's orbit that is farthest from the sun
point in an orbit when the moon is closest to the earth
point in an orbit when the moon is farthest away to the earth.
Phases of the Moon
the progression of changes in the moon's appearance during the month
Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
A bowl-shaped area that forms around a volcano's central opening
A star shaped pattern caused by an impact of an meteor hitting the moon.
a dark, smooth plain on the surface of the moon
a long, narrow valley on the surface of the moon
a thin, gray layer on the surface of the moon, consisting of loosely compacted, fragmented material believed to have been formed by repeated impacts of meteorites