Part a
consider the following observations. classify each observation based on whether it is a real observation (a true statement of something we can actually see from earth) or one that is not real (a statement of something that does not really occur as seen from earth).
[real: true statements]
- mercury goes through a full cycle of phases
- moon rises in east, sets in west each day
- stars circle daily around north or south celestial pole
- positions of nearby stars shift slightly back and forth each year
- a distance galaxy rises in east, sets in west each day
[not real: false statements]
- we sometimes see a crescent jupiter
- a planet beyond saturn rises in west, sets in east