Lemaître coordinates [SEP] named after
Lemaître coordinates
Lemaître coordinates are a particular set of coordinates for the Schwarzschild metric—a spherically symmetric solution to the Einstein field equations in a vacuum—introduced by Georges Lemaître in 1932. Changing from Schwarzschild to Lemaître coordinates removes the coordinate singularity at the Schwarzschild radius.
The Lemaître coordinates.
The original Schwarzschild coordinate expression of the Schwarzschild metric, in natural units (), is given as
where
This metric has a coordinate singularity at the Schwarzschild radius formula_8.
Georges Lemaître was the first to show that
the Reissner–Nordström metric. 
Rotating black holes are described by the Kerr metric and the Kerr–Newman metric.
Examples Other metrics.
Other notable metrics are:
- Alcubierre metric,
- de Sitter/anti-de Sitter metrics,
- Friedmann–Lemaître–Robertson–Walker metric,
- Isotropic coordinates,
- Lemaître–Tolman metric (aka Bondi metric),
- Peres metric,
- Rindler coordinates,
- Weyl−Lewis−Papapetrou coordinates,
- Gödel metric.
Some of