ASTRON 10 Lecture 39: Big Bang
Document Summary
Red shift shows that most galaxies are moving away from us. Expansion between galaxy clusters (no expansion within galaxies) (edwin hubble"s observation) Hubble"s law - the amount of red shift is proportional to the distance. The farther away an object is, the more lines in its spectrum are red-shifted. We see objects redshift in those that are outside our galaxy. Only blue shift objects are within our galaxy. Hubble found that the universe expands (and not one was able to disprove it) Hubble diagram - plot of the redshift (recession speed_ vs. distance. Hubble"s law - the proportionality plotted oj the hubble diagram. Cosmology - the student of the structure and evolution of the universe (universe"s birth, age, size, geometry, and ultimate fate) States that the universe had no beginning and will have no end. Says that there was no big bang that started it all. Cosmic microwave radiation - a faint radio that pervade uniformly the universe.
