How old is the universe?

The age of objects in our solar system. 4004 BCE

Moon rocks and meteorites

Defying gravity

The ages of the oldest stars. Stepping out

distances and light

All stars are not the same

Giant and dwarf stars

Reading a Hertzsprung-Russell (H-R) digram

Mass

Star clusters

Mas matters

White dwarfs and the age of the universe

Ages of globular clusters and the age of the universe

The age of the universe. Cepheids

An irregular system of globular clusters

The Milky Way demoted

The trouble with gravity

The expanding universe

The Hubble age of the universe

The accelerating universe

Dark matter

Exotic dark matter

Hot stuff

Two kinds of trouble

The WMAP map of the CMB and the age of the universe

A consistent answer.