the study of the moon, stars and other objects in space.
the center around which something rotates
the spinning of the Earth on its axis
the movement of one object around another.
the path of an object as it revolves around another object in space
a system of organizing time that defines the beginning, length, and divisions of a year.
when the sun is farthest north or south of the equator
period of equal days and nights; the beginning of spring and autumn; Ex. vernal/autumnal equinox
a push or pull
the force that attracts all objects toward each other
law of universal gravitation
every object ibn the universe attracts every other object
the amount of matter in an object
the force of gravity on an object
the tendency of an object to resist a change in motion
Newton's first law of motion
the scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force
the different shapes of the moon you see from Earth
When an objet in space moves between the sun and a third object, it casts a shadow on the third object.
darkest part of the moon's shadow
partial shadow (in an eclipse)
the rise and fall of the ocean water that occurs every 12.5 hours or so.
a tide with the greatest difference between low and high tides
the tide with the least difference between consecutive low and high tides
large round pits in the moon's surface
chunks of rock or dust from space
dark, flat regions on the moon's surface also > the Latin word for "seas"