a round solid figure, or its surface, with every point on its surface equidistant from its center.
sphere
an imaginary line about which a body rotates , the earth revolves on its axis once every 24 hours
axis
the action of rotating around an axis or center
rotation
the action of moving around something in a path that is similar to a circle
revolution
an obscuring of the light from one celestial body
eclipse
either of the two times in the year, the summer solstice and the winter solstice
solstice
when day and night are of equal length
equinox
the phases of the moon
moon phase
the phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent
new moon
moon between new and full
waxing
the phase of the moon in which its whole disk is illuminated
fullmoon
To show a progressively smaller illuminated area, as the moon does in passing from full to new.
waning
an eclipse in which the sun is obscured by the moon.
solar eclipse
an eclipse in which the moon appears darkened as it passes into the earth's shadow
lunar eclipse
to cause to lean, incline, slope, or slant.
tilt
sunlight not directly lighting something
indirect sunlight
sunlight directly lighting an area
direct sunlight
The path of a celestial body or an artificial satellite as it revolves around another body due to their mutual gravitational attraction.
orbit