The document discusses several key ideas in cosmology, including the cosmic web, dark matter, dark energy, the Big Bang, and inflation. It proposes that sound waves generated during the inflationary era could have put the "Bang" in the Big Bang by eventually forming galaxies and clusters. It also explains that dark energy, in the form of vacuum energy, is thought to be causing the accelerating expansion of the universe. Finally, it mentions the goal of precision cosmology to develop a "concordance" model combining observations with theory.

1. THE COSMIC WEB The Cosmic Web BLOG: http://telescoper.wordpress.com Peter Coles

7. Spectral Lines turned Astronomy into Astrophysics !

9. The Hubble Expansion

15. THE COSMIC WEB The Cosmic Web of Ideas Dark matter Dark Energy The Big Bang Cosmic Inflation General Relativity

17. THE COSMIC WEB

18. Light Stretches !

24. Why has the Sun got an edge?

44. Flat Space Open Space Closed Space

48. fainter

52. “ CONCORDANCE”

54. Precision Cosmology “… as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns -- the ones we don't know we don't know.”

55. Planck Time!