Chapter 9 - Astronomy

earth_science

Unit D - Astronomy, Weather and Climate

Chapter 9 - Astronomy

Learn more about the Earth, the Sun, the Moon and how our Solar System formed. Meet astronomers, conduct an interview with Mars, and investigate whether or not the moon rotates on axis.

Mars: Past, Present, Future

Young Naturalist Awards Essay

Mars: Past, Present, Future

In the early 1900s, some astronomers believed that the color contrasts on Mars' surface were great oceans. Today we know they are huge dust storms. Track how our knowledge of Mars has changed with this seventh-grader.

The 3-D Universe

Article

The 3-D Universe

A 2-D map is a great guide here on Earth—and virtually worthless for finding your way around in outer space. Take a 3-D look at mapping our solar system and universe.