Slide 1What are Galaxies? Galaxies are large systems of stars and interstellar matter(planets, moons, asteroids, etc.) typically containing several million to trillions of…

1. Black Holes 2. Black Holes The intense gravitational field left when a giant star collapses 3. It is called a black hole because not even light can escape 4. Photon SphereThe…

Slide 1 Chapter 15, Galaxies G alaxies come in different size and shape. In the previous chapter, we talked about how galaxies provide an environment for the stars to be…

Slide 1 Slide 2 A. Earth’s Galaxy—and Others Galaxy: A large group of stars, gas, and dust held together by gravity. Milky Way: Our galaxy which contains about 200 billion…

Astronomy 1 Terms Astronomy â The study of the universe Universe â Everything known that exists, including space, time and matter Solar System â the Sun and its family…

PowerPoint Presentation TYPES OF GALAXIES/ Our sun notes SPIRAL GALAXY The Milky Way is a spiral galaxy, A spiral galaxy is disk-shaped with a bulge in the middle and arms…

Astronomy Unit Key Topics Astronomy Unit Big Bang Theory: most widely accepted theory for the origin of our universe. States that 12-14 billion years ago, the universe was…

The Universe â Near & Far Earth-Moon-Sun Planets Beyond our Solar System Miscellaneous 10 10 10 10 20 20 20 20 30 30 30 30 40 40 40 40 50 50 50 50 The turning of an…

Chapter 15 Normal and Active Galaxies Chapter 15 Normal and Active Galaxies 1 Units of Chapter 15 Hubble’s Galaxy Classification The Distribution of Galaxies in Space Hubble’s…

    •  Throughout  the  universe  there  are  enormous  groups  of  solar  systems  called   galaxies.    They  surround  our  en8re  galaxy,  which…