* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Galaxy Notes Presentation
History of astronomy wikipedia , lookup
Outer space wikipedia , lookup
Constellation wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Corona Australis wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Gamma-ray burst wikipedia , lookup
Aries (constellation) wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Space Interferometry Mission wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Modified Newtonian dynamics wikipedia , lookup
Andromeda Galaxy wikipedia , lookup
Stellar classification wikipedia , lookup
Stellar evolution wikipedia , lookup
Observational astronomy wikipedia , lookup
Open cluster wikipedia , lookup
Cosmic distance ladder wikipedia , lookup
High-velocity cloud wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Stellar kinematics wikipedia , lookup
Galaxies and Stars The universe… …is space and everything in it. Galaxies A galaxy is a cluster of stars, gas, and dust that are held together by gravity. There are three main types of galaxies: Irregular Elliptical Spiral Types of Galaxies – Irregular… Some galaxies does not have regular shapes They contain young stars, dust, and gas. Types of Galaxies – Elliptical... Elliptical galaxies look like a ball that has been flattened. These galaxies contain billions of stars, but have little gas and dust between the stars. Contain only old stars. Types of Galaxies –Spiral… Spiral galaxies consist of a flat, rotating disk with stars, gas, and dust and a central concentration of stars, known as the bulge. Contains middle aged stars Types of Galaxies – Barred Spiral… The arms terminate at the ends Looks like Spiral Galaxies without arms extending out. Contain old and new stars A Milky Way giant spiral galaxy including our Sun The disk’s diameter is 100,000 light years Mass is 1,000 to 2,000 billion times the mass of the Sun The Sun lies a little more than 30,000 light years from the center Cannot actually count the number of stars in the galaxy, can estimate as roughly 100 billion Andromeda Galaxy The 2 other large galaxy in our cluster million light years away More luminous than us Visible to the naked eye What makes up galaxies? Nebulas – giant clouds of gas and dust where new stars can form. It is considered the star nursery. Stars and star clusters Black Holes – now believed to be the center of all spiral and elliptical galaxies Star Clusters Globular clusters look like a ball of stars with 20,000 to 100,000 stars on average. Newly formed open clusters have many bright blue stars with a few hundred to a few thousand stars. Copy this chart. You have only 10 mins.