What is a galaxy? A galaxy is a system containing millions or even billions of stars. We estimate that there are 50 billion to 100 billion galaxies in.
Chapter 24 Galaxies. Beyond the Milky Way are billions of other galaxies Some galaxies are spiral like the Milky Way while others are egg-shaped / elliptical.
Objectives Describe how astronomers classify galaxies. Identify how galaxies are organized into clusters and superclusters. Describe the expansion of.
Galaxies. Galaxies2 Introduction Beyond the Milky Way, the visible Universe contains more than ten billion galaxies Some galaxies are spiral like the.
Galaxies The Basic Element of Cosmology. Warm Up Please complete a K-W-L chart for the topic of galaxies.
Most of the power of galaxies come from the stars Almost all nearby galaxies Some galaxies have very bright sources right at the center Can be as bright.
Chapter 24
El universo: Edad: 13.7 millardos de años (1 % de error) Expansión: 71 km/sec/Mpc actualmente (5 % de error) 73% = Energía oscura 23% = materia oscura.
Active Galaxies
