Lesson 1 - Speed of Light
In this lesson, students will learn how to calculate how far light will travel in one year. On Earth we measure distance in metres or kilometres, depending on the scale of what we are measuring. In space, distances between celestial bodies are so much larger that the use of metres or kilometres to measure distances becomes completely meaningless. Astronomers us the concept of the “light year” to measure distances because it is much easier to conceptualize distances in space.