The cosmological parameters that I will emphasize are the Hubble parameter H _ { 0 } \equiv 100 h km s ^ { -1 } Mpc ^ { -1 } , the age of the universe t _ { 0 } , the average matter density \Omega _ { m } , the baryonic matter density \Omega _ { b } , the neutrino density \Omega _ { \nu } , and the cosmological constant \Omega _ { \Lambda } .
The evidence currently favors t _ { 0 } \approx 13 Gyr , h \approx 0.65 , \Omega _ { m } \approx 0.3 , \Omega _ { \Lambda } \approx 0.7 .