This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Models of the Sky - Celestial Sphere The constellations that the stars are associated with used to just be traditional groupings. Different cultures had different constellations. When astronomy got more scientific and organized, the little stick figures you see for the constellations sort of changed over time. Today there are 88 constellations in the sky and they are actually sort of like counties in a state. There are 99 counties in the state of Iowa and each piece of land in the state is part of some county, based upon where the boundaries are drawn. This is also how we now divide up the sky - the constellations don't just define a stick figure of a dog, horse or person, but a region of the sky. Something in that region belongs to a certain constellation. This is shown in Figure 1. Figure 1. The territory that belongs to a certain constellation is shown by the green lines, while the red lines show a traditional way of drawing the "shape" of the constellation. The constellation boundaries are not subject to change, but the lines that represent the stick figure...
View Full Document
- Fall '10