1.Previous
3.Next

the age of the universe. One is based on a particle physics model of the early universe called Lambda-CDM, matched to measurements of features from very early in the history of the universe, like the cosmic microwave background. The other is based on the distance and relative velocity of a series or "ladder" of different kinds of stars, making it depend on local measurements late in the history of the universe. These

1.Previous
3.Next