Earth, Sun, Moon System Vocab Flashcards
An imaginary line that passes through the Earth’s center and North and South poles
Axis
The spinning motion of a planet on it’s Axis
Rotation
The movement of an object around another object
Reveloution
Large gaseous body at the center of the solar system
Sun
A natural satellite that orbits the planets
Moon
Path of an object as it revolves around another object in space
Orbit
The partial or total blocking of one object in space
Eclipse
The partially shaded outer region of the shadow cast by an opaque object.
Penumbra
The fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
Umbra
The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20).
Equinox
The time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days (about June 21 and December 22).
Solstice
The alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun.
Tide
A tide just after a new or full moon, when there is the greatest difference between high and low water.
Spring Tide
A tide just after the first or third quarters of the moon when there is least difference between high and low water.
Neap Tide
Each of the aspects of the moon or a planet, according to the amount of its illumination, especially the new moon, the first quarter, the full moon, and the last quarter.
Phase
