Lesson: Stars and Galaxies Science • Third Year of Preparatory School

Students will be able to

• understand that stars are very large, very hot objects that are very far away,
• understand that a light-year is a unit used to measure astronomical distances,
• know the length of a light-year in kilometers,
• understand that there are billions of stars in a galaxy,
• know that our galaxy is called the Milky Way,
• understand that the Milky Way has a spiral shape,
• know the major types of optical telescope,
• understand that the Sun takes several hundred million years to orbit the center of the Milky Way,
• know that the solar system is located in one of the spiral arms of the Milky Way,
• know the definition of a light-year as the distance traveled by a beam of light in one year.