This zip file contains many different activities (66 pages of student handouts and 2 PowerPoints with a total of 133 slides) which can be used to compose a unit introducing concepts involving the earth in the universe. Some of the concepts addressed include the origin of the universe and solar system, using HR diagrams to characterize stars, star evolution, the components of the solar system, Kepler's first and second laws, eccentricity and the position of a planet in its orbit in relation to