Prof Mel Ulmer DEPT OF PHYSICS ASTRONOMY http

Prof. Mel Ulmer DEPT OF PHYSICS & ASTRONOMY http: //www. astro. edu/astro/faculty/ulmer/a 01_fall 2002. html

TA: David Lin d-lin@northwestern. edu Office hours: Thursdays 4: 00 -5: 00 For help with Cepheid variable lab, Make an appointment No discussion sections this week of Sep. 23 • Discussion sections: can come to more than one. • Discussions sections (see syllabus also) all in Tech: • Th. , 2 -3 (L 170) 3 -4 (LG 66) U; Fri. 12 -1 LG 68, 1 -150 M 349 Lin

Sun, 8 light minutes

Mars, 12 light minutes

Jupiter, 40 lt min.

Pluto and Charon, 300 lt min

A star with planets forming; 50 lt year

Andromeda, a Galaxy like ours, 2 million lt yrs 100 billion Stars; 100, 000 lt yrs across You are here!

Virgo cluster, 60 million lt yrs 1000 galaxies, 6 million lt yrs across

Coma Cluster, 360 million lt yrs, 1000 galaxies 6 million lt yrs across

A cluster 4 billion lt yrs 1000 galaxies, 6 million lt yrs across Hubble Deep Field, 10 billion lt yrs

Brick Wall, 15 billion lt yrs

BOOMERANG

Top Hat

DASI

Planck COBE Planck

Maybe we already know! Data Models closed flat open

Maybe we already know, part I, extended Need to Assume ordinary matter, WIMPS, Dark energy To make curve Blocks= Data

Now we know, II

Maybe we already know, III SN Ia clusters CMB

Mauna Kea, On Big Island

Keck, 10 meters Person

Myall, 4 meters

The End