Fill in the Blanks OUR PLANET EARTHOnline version LISTENING by celia maria alcántara martínez 1 The is made up of millions of galaxies . Our is called the . It contains millions of , including the Sun . The Earth and seven other planets the Sun . Together they form the . The spins on its axis . It also orbits ( or moves around ) the . These movements explain why we have day and night and the changes in the seasons on the Earth .