Geometry
Different curvature geometries
Curved space
Question 1:Different perceptions?
Question 2:Counting galaxies
Explanation
A better test!
Angular size and distance
Parallel lines
"Standard rod"
Question 3:Good idea?
COBE
satellite: mapping the sky
Acoustic oscillations
An unusual standard rod
Growth of density contrast
Electron glue
Opposing forces
Temperature change in gases
A real standard rod!
No "Big Crunch"!
For further reading only (not on final): Wayne
Hu's web page
