Write your definition next to the word. If more than 5 terms are defined, only the first 5 will be marked. Measuring distances to astronomical objects is essential. Describe two examples showing why knowing an object's distance is so important. Explain your diagram.
Astronomers are experts on the properties of light.
Because we can see its surface, we can study spots on the sun. Draw a picture of the sun's surface showing what you would expect to see today through a telescope. Explain how its measurements are affected by being made at the maximum of the sunspot cycle.