Words to Learn! Vocabulary words in Space. It is groups of stars that form a star picture. Constellation A small, frozen mass of dust and gas revolving around the sun. Comets They are holes made when a large moving rock hit the moon. craters What is the name of Our Galaxy? Milky Way (the word "Galaxy" actually means milky way in Greek). It is a force that pulls things toward the center of the earth. gravit y It is a shooting star, observed when a particle of dust enters into the Earth's atmosphere. Meteor It is called a "falling star" as it falls to Earth. What is a natural satellite? The Moon It is the largest object you can see in the night sky. moon It is the light of the moon. moon light It is the path around an object. Orbit It is a large ball of rock or gas that follows a path around the sun (An object moving around a star.) Planet It is when something is spinning round and round. Rotation It is light and heat from the sun. Solar Energy It is what we call sun and the planets. Solar system It is the star closest to Earth. Sun It is all the things that are in space and beyond. Universe A rock, or minor planet orbiting the Sun. Asteroid What is a artificial satellite? It is a machine made by man . It is an object that orbits another object in space. Satellite It is when the moon appears to be getting smaller . Waning It is when the moon appears to be getting larger. Waxing There will be more!!!