Cosmology

Questions in this category have been asked by MT, PJ

• Describe the evolution of the Universe backwards in time from now to the beginning. Include the relative abundances of ALL particles (bosons & fermions) in the description.
• What is Omega_DarkMatter?
• Can it be neutrinos & how do we know?

• What is the flatness problem?
  • How can you use inflation to explain it? (using Freedman eqs)
• What are other importances of inflation?
• What is CMB anisotropy?
  • What is the value and the position of the first acoustic peak and its physics?
• What do you know about the CMB spectrum?

• Why do we need BBN to account for the abundance of He?
• Why can't BBN produce heavier elements but a star can?

• What do you know about dark energy?

• What is the Lyman-alpha forest?