ASTRON C10 Lecture Notes - Lecture 35: Rubber Band

• School: Berkeley
• Department: Astronomy
• Course: ASTRON C10
• Professor: Alexei Filippenko

Document Summary

Incorrect deduction to say that it is accelerating . Universe is either infinite or it wraps around itself. Infinite rubber band with knots in it: a good 1d analogy. R (scale factor) is getting larger with time. R can be thought of as the distance between any two clusters of galaxies. If the speed of a given galaxy always decreases with time (because gravity is slowing down the expansion of the universe), then t 0 . He doesn"t like this concept since every object has variations.