1. application of GR to a homogeneous and isotropic universe leads to 3 models

3. positively curved space

4. flat space

5. negatively curved space

6. application of GR to a homogeneous and isotropic universe leads to 3 models

7. (FOR  = 0) …but… …for non-zero  one can get a static universe

8. application of GR to a homogeneous and isotropic universe leads to 3 models (FOR  = 0) …but… …for non-zero  one can get a static universe “…my greatest blunder…”

9. Arno Penzias and Bob Wilson… …with Bell Labs microwave telescope that they used to discover the Cosmic Microwave Background Radiation