Celestial Motions
Give the vocabulary word: the spinning motion of an object on its axis.
Rotation
The force that keeps the planets in our solar system revolving around the Sun.
Gravity
This occurs when the Moon moves directly between the Sun and Earth.
Solar Eclipse
The phase of the lunar cycle that occurs when the Moon’s near side is completely dark.
New Moon
A huge collection of stars, such as the Milky Way. (hint: what is the vocabulary word)
Galaxy
Give the vocabulary word: The path an object follows as it moves around another object.
Orbit
The Law of Universal Gravitation states that gravity depends on these two factors.
Mass and Distance
The central, darker part of a shadow where light is totally blocked.
Umbra
The reason we always see the same side of the Moon from Earth.
synchronous rotation (Rotation and revolution of the Moon take the same amount of time)
The average distance from Earth to the Sun (about 150 million km). What is the space unit used?
Astronomical Unit (AU)
The number of days it takes for Earth to complete one full revolution around the Sun.
365.25 days
This factor determines if an object has a stronger gravitational force than another object.
Mass
The lighter part of a shadow where light is partially blocked.
Penumbra
During these phases of the lunar cycle, more of the Moon’s near side is lit each night.
Waxing
This process must begin in a star's core for it to be "officially" born.
Nuclear Fusion
This occurs when Earth’s axis is most tilted toward or away from the Sun.
Solstice
True or False: Gravity is stronger between two objects if they are farther apart.
False, gravity is weaker when father apart.
The effect caused by sunlight deflecting through Earth’s atmosphere into the umbra during a lunar eclipse.
"Blood Moon"
The Moon does not produce its own light; where does the light come from?
Reflects off the moon from the sun
A streak of light seen when a rocky particle enters Earth’s atmosphere and glows due to friction.
Meteor
This term comes from Latin and means "equality of night and day."
Equinox
The primary result of Earth’s rotation on its axis.
The cycle of day and night
This type of eclipse occurs when the Moon moves into Earth’s shadow during the full moon phase.
Lunar Eclipse
The specific direction in which Earth rotates (from west to east).
Counterclockwise
A meteoroid that has actually struck the surface of a planet or moon.
Meteorite