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DES Unit 1: Sun, Earth, Moon Relationships
The changing appearances of the Moon as seen from Earth
the moon phase in which we see less than half of the moon's sunlit side
First Quarter Moon
when the right half of the sunlit side of the moon is visible
Third Quarter Moon
when the left half of the sunlit side of the moon is visible
the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth
spinning of Earth on its imaginary axis, which currently takes about 24 hours to complete and causes day and night to occur
the movement of an object around another object such as the Earth orbiting around the Sun.
farthest point from the earth in the orbit of a celestial body such as the Moon
closest point from the earth in the orbit of a celestial body such as the Moon
A representation of the universe in which stars and planets revolve around Earth. Ptolemy proposed the model.
A representation of the relationship between the Sun and planets in which the planets revolve around the Sun. Copernicus proposed the model.
Apparent backwards motion of the planets in Earth's sky
The darkest part of the shadow cast by the Moon on the Earth or the Earth on the Moon
The light outer portion of the shadow cast by the Moon on the Earth or the Earth on the Moon