Gravitational lensing
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Gravitational lensing is a gravitational-optical effect whereby a background object like a distant quasar is magnified, distorted and brightened by a foreground galaxies. An intervening concentration of matter is declared to bring 'focusing' effect attributed to general relativity so that even objects normally beyond observational distance can bee seen by astronomers at the Earth. It is alleged that, for example, the galaxy cluster Abell 2218, distorts and magnifies light from galaxies behind it.[1]
References
- ↑ Ron Samec. No sign of gravitational lensing in the cosmic microwave background. Creation Ministries International. Retrieved on 2012-10-25.