Documents Prof. Mel Ulmer DEPT OF PHYSICS & ASTRONOMY Discussion sections begin meetings this week Begin.

Slide 1 Prof. Mel Ulmer DEPT OF PHYSICS & ASTRONOMY http://www.astro.edu/astro/faculty/ulmer/a01_fall2002.html Discussion sections begin meetings this week Begin observing…

Documents Why is the universe lumpy? Tuesday, February 19.

Why is the universe lumpy? Tuesday, February 19 The average density of the universe is 9 × 10-27 kg/m3. Some of the universe is much denser than average (stars, white dwarfs,…