character: Charles Messier
topic: Discovery of astronomical phenomena influenced by Gravitational Lensing
grade: 12
subject: Physics
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character: Albert Einstein
topic: Theory of General Relativity and its implications for Gravitational Lensing
grade: 12
subject: Physics
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character: Stephen Hawking
topic: Black Holes and their effects on Gravitational Lensing
grade: 12
subject: Physics
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character: Hubble Space Telescope
topic: Observations of Gravitational Lensing in distant galaxies
grade: 12
subject: Physics
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