Chapter 20 Sections 1-3
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Transcript of Chapter 20 Sections 1-3
Chapter 20Sections 1-3By: Shannon Harris
Astronomical UnitThe average distance between
the earth and the sun.
Terrestrial PlanetsThe name for the inner planets
Prograde RotationThe counterclockwise spin of a
planet or moon as seen from above the planet’s.
Retrograde RotationThe clockwise spin of a planet or
moon as seen from above planet’s.
Gas GiantsVery large planets that don’t
have any known solid surfaces.
Satellites Natural or artificial bodies that
revolve around larger bodies like planets.
Phases The different appearances of the
moon due to its changing position.
Eclipse Occurs when the shadow of one
celestial body falls on another.
Comet A small body of ice, rock, and
cosmic dust loosely packed together.
Asteroid Small, rocky bodies in orbit
around the sun.
Asteroid BeltA region of the solar system
between the orbit of Mars and Jupiter.
Meteoroid A small body moving in the solar
system that would become a meteor