AST 104 Study Guide - Midterm Guide: Red Supergiant Star, False Color, Binary Star
Document Summary
How do stars at different locations on an h-r diagram compare: x- axis: b-v color index, temperature, and spectral class b. Why are star clusters particularly interesting to study: open clusters: i. ii. iii. iv. v. Generally contain a few hundred up to a couple thousand members. Blue and o, b, a stars: globular clusters: i. Can contain more than 1 million stars ii. iii. iv. v. Always look like crowded spheres of stars, especially crowded in the center. Red and g, k, m stars: why star clusters are particularly interesting to study: i. ii. iii. iv. v. The stars in any given star cluster are all at (almost exactly) the same distance. The stars in any given star cluster all formed at the same time from the same cloud of stuff. There are distinctive similarities among open clusters and among globular clusters. There are distinctive differences between the two kinds of cluster.
