an imaginary line around which a sphere (EARTH) rotates
a group of stars humans observe in a pattern and give a name
the time between sunrise and sunset on Earth when it is light
first quarter moon
a phase of the moon in the lunar cycle halfway between a new moon and a full moon. The moon appears to be a half moon when seen from Earth.
a phase of the moon in the lunar cycle when all of the sunlit side of the moon is visible from Earth
a group of billions of stars. Earth is in the Milky Way Galaxy.
a word used to describe the moon when it appears to be more than half but less than full
the boundary between the Earth's surface and the sky
the four week period where the moon orbits Earth one time and goes through all the phases
one of the billions of galaxies that make up the universe. The sun is one of the billions of stars in the Milky Way galaxy.
Earth's natural satellite
the phase of the moon when the sunlit side of the moon is not visible from Earth
the time between sunset and sunrise on Earth when it is dark
to move or travel around an object in a curved path. Earth orbits the sun. The moon orbits the sun.
the shape of the visible part of the Moon
to turn on an axis
four times during the year that bring predictable weather conditions to a region on Earth. The four seasons are spring, summer, fall, and winter.
the sun and planets and other objects orbit it
a huge sphere of hydrogen and helium that radiates heat and light. The sun is a star.
the time of day when the sun is going below the horizon in the west.
the time of day when the sun is coming over the horizon in the east.
third quarter moon
the phase of the moon halfway between the full moon and the new moon. The moon appears from Earth to be a "half moon".