Lecture 1: Introduction to Cosmology Astronomy 5: The Formation and Evolution of the Universe Sandra M. Faber Spring Quarter 2007 UC Santa Cruz.

Lecture 1: Introduction to Lecture 1: Introduction to CosmologyCosmology

Astronomy 5: The Formation and Evolution of the UniverseAstronomy 5: The Formation and Evolution of the UniverseSandra M. FaberSandra M. Faber

Spring Quarter 2007Spring Quarter 2007

UC Santa CruzUC Santa Cruz

The Andromeda galaxy: big sister of our Milky Way

2 million light years away

60,000 light years across

x

The Andromeda galaxy: big sister of our Milky Way

2 million light years away

60,000 light years across

Andromeda is composed of billions of stars

Spirals are flattened, rotating disks seen at various

inclinations

Spirals are flattened, rotating disks seen at various

inclinations

Spirals are flattened, rotating disks seen at various

inclinations

Our Milky Way is a spiral. We live in its disk.

x

The Milky Way as seen at dark sites

The constellation Orion against the backdrop of the Milky Way -- a sense of

scale

The constellation Orion against the backdrop of the Milky Way -- a sense of

scale

The Orion nebula imaged by the Hubble Space Telescope

A major recent discovery: color bimodality

A major recent discovery: color bimodality

QuickTime™ and aMotion JPEG A decompressor

are needed to see this picture.

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality

A major recent discovery: color bimodality