Spring 2010 Astronomy 110 MWF 9:30 &mdash 10:20

13. THE REALM OF THE NEBULAE

The universe is populated with galaxies — some like our own Milky Way, others very different. Recognizing other galaxies and estimating their distances led astronomers to the realization that the universe is expanding. Looking back, we see galaxies less than a billion years old; galaxy collisions may produce similar objects at the present day. Collisions may also spark galactic activity by feeding central black holes.


Reading

Please read all of Chapter 15.

15.1 Islands of Stars
15.2 Distances of Galaxies
15.3 Galaxy Evolution
15.4 Quasars and Other Active Galactic Nuclei

Online

  1. Complete the Realm of the Nebulae assignment, due Monday, 19 Apr 2010 at 9:00 am.

  2. Review the lecture slides.

Joshua E. Barnes      (barnes at ifa.hawaii.edu)
Updated: 17 April 2010
http://www.ifa.hawaii.edu/~barnes/ast110_10/nebulae.html
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