Astronomy: Motion of the Moon and Eclipses
Terms in this set (21)
the point in the orbit of the Moon (or a satellite) at which it is furthest from Earth.
Phase of the Moon
1.The Sun only illuminates half the moon at any one time.
2.We only see half the moon at any one time (always the same half - near side).
3.The half of the moon illuminated by the sun
necessarily correspond to half of the moon facing Earth
Illuminated face of Moon is completely invisible to Earth.
Illuminated face of Moon is completely visible from Earth.
As the phases of the Moon go from New to Full, amount of Moon illuminated increases.
As phases go from Full back to New, amount of Moon we see illuminated decreases.
Near side of Moon half illuminated
Moon over half illuminated
Moon less than half illuminated
It takes 27.3 days for the Moon to go around the Earth.
Full Moon to Full Moon
29.5 days for the phases of the moon to repeat
When an object in space comes between the sun and a third object, it casts a shadow on the object
When the Moon comes between the Earth and Sun, Sun's light can be eclipsed (blocked out) by the Moon
large, broad, flat plains on the Moon
produced by the impact of rapidly moving debris (meteoroids, asteroids, comets); a large, bowl-shaped cavity in the ground or on the surface of a planet or the Moon
white, bright looking lunar area elevated several kilometers above the maria
When Earth comes between Moon and Sun, the Sun's light which would normally illuminate Moon is eclipsed by Earth.
The point in the orbit of the Moon or a satellite at which it is nearest to the earth.
A thin, gray layer on the surface on the moon; formed from billions of years of meteor bombardment; composed of igneous rock, breccia (rock consisting of angular fragments cemented together), glass beads, and fine lunar dust.
The very darkest part of the Moon's shadow.
The largest part of the Moon's shadow.