Mr. E. Science
Stars, Galaxies and the Universe
It takes 225 million years for our sun to travel around the galaxy. The presentation covers astronomical units, light years, telescopes, types of stars, the life cycle of a star, and types of galaxies. This is the last lesson in a...
Sophia Learning
Sophia: The Solar System: Lesson 1
This lesson will develop a map of the solar system in proportion to the distance between the planets. It is 1 of 3 in the series titled "The Solar System."