लेखक: Harold Levine

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2 द्वारा ईबुक Harold Levine

Harold Levine & Arlie O. Petters: Singularity Theory and Gravitational Lensing
Astronomers do not do experiments. They observe the universe primarily through detect- ing light emitted by stars and other luminous objects. Since this light must travel through space to reach us, v …
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