First gravitational lens (Twin Quasar)
Primera lente gravitacional (cuásar doble Q0957+561)
- Date
- 1979 · confidence high
- Place
- Kitt Peak Observatory, Arizona, United States
- Credited to
- Dennis Walsh, Robert Carswell, Ray Weymann
- People
- 👤 Dennis Walsh1933–2005👤 Ray Weymann1935–👤 Robert F Carswell1940–
- Field
- Cosmos & Earth
What was discovered
Two identical images of the same quasar, split by the gravity of an intervening galaxy, confirmed Einstein's prediction and opened up a tool for weighing dark matter and viewing distant galaxies.
What it led to
- Mapping dark matter with weak lensing
- Hubble constant from time delays
- Magnification of primordial galaxies (Webb)