Muggles' Guide to Harry Potter/Characters/Professor Sinistra

Overview
Professor Sinistra is the Astronomy professor at Hogwarts School of Witchcraft and Wizardry.

Goblet of Fire
It is mentioned that Professor Sinistra is dancing with Professor Moody at the Yule Ball.

Analysis
Astronomy in the Harry Potter world is very different from real astronomy. There are no physics present in the Harry Potter astronomy. Rather, the lesson focuses on nomenclature and its position in relationship to the other planets. The various stars outside of our Solar System, other galaxies, black holes, and other celestial objects play little importance. In short, Harry Potter's astronomy is descriptive.

Questions

 * 1) How might Astronomy be important in learning about magic? Why is it considered separate from Divination?
 * 2) Think about what kind of personality Professor Sinistra might have, and describe it.