Gravitational lensing describes how a massive object (for example a star or galaxy) changes the path of light from a distant object. The most obvious observational examples of gravitational lensing are the production of multiple images of distant objects.

The most advanced pages are marked with [A], graphically intensive pages with [G] and pages requiring Java with [J] .

• Links to Gravitational Lensing pages

  • An introduction to Gravitational Lensing [J]
  • The MPA Gravitational Lensing Group
  • Gravitational Lensing candidates [A]
  • Pictures of several Gravitational Lenses
  • See the effect of a Gravitational Lens
  • The Gravitational Lensing Bibliography and Database [A]

• Current experiments and projects

  • The CASTLES project details all known gravitational lens candidates
  • The Optical Gravitational Lensing Experiment (OGLE)
  • Gravitational lensing with the Nordic Optical Telescope

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