revolution The action of a heavenly body going round in one orbit. The time taken to complete one orbit.
Moon phases or Lunar phases The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth. The lunar phases change cyclically as the Moon orbits the Earth, according to the changing relative positions of the Earth, Moon, and Sun.... http://www.moonconnection.com/moon_pha ses.phtml http://www.moonconnection.com/moon_pha ses.phtml
New Moon the moon's phase when its dark side is toward the earth; also : the thin curved outline of the moon seen shortly after sunset for a few days after the actual occurrence of the new moon phase
Crescent moon As the Moon waxes (the amount of illuminated surface as seen from Earth is increasing), the lunar phases progress from new moon, crescent moon, first-quarter...
gibbous seen with more than half but not all of the disk
Solar eclipse As seen from the Earth, a solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks...
Lunar eclipse A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned...
gravity A force that attracts all physical objects toward each other. http://www.moonconnection.com/moon_gra vity.phtml http://www.moonconnection.com/moon_gra vity.phtml
tides Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. http://scienceprimer.com/lunar-and-solar- tides http://scienceprimer.com/lunar-and-solar- tides