B. the universe
1.1b classification of galaxies
The universe2
Group IA table of elements
Ch 20 -galaxies
What is a Galaxy? A galaxy is made of billions of stars, dust, and gas all held together by gravity.A galaxy is made of billions of stars, dust, and gas.
Deep HST Imaging of M33: the Star Formation History Jon Holtzman, Roberto Avila (NMSU) Julianne Dalcanton, Ben Williams (UW) Ata Sarajedini (UFl) Don Garnett.
Galaxies Galaxies M81. The Milky Way Galaxy.
Stars & Life Cycle of Stars. Birth of Stars 1 st a huge cloud of nebula 2 nd as the density of the gas grows so does gravitational pull (more particles.
Deep Washington Photometry of the HST M31-halo field Edward Olszewski, Abi Saha, and Andy Dolphin Many thanks to: MMT staff, SAO Instrument builders, Steward.
