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Search: authors:"S. W. Hawking"

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Black Holes in the Early Universe

The existence of galaxies today implies that the early Universe must have been inhomogeneous. Some regions might have got so compressed that they underwent gravitational collapse to produce black holes. Once formed, black holes in the early Universe would grow by accreting nearby matter. A first estimate suggests that they might grow at the same rate as the Universe during the...

The Rotation and Distortion of the Universe

The isotropy of the microwave background is used to place upper limits on the large-scale anisotropics of the Universe. This is done by considering the behaviour of the microwave background in all types of spatially homogeneous models that could reasonably represent our Universe. If the Universe is closed, we find that it is rotating at a rate of less than 3 × 10−11 second of arc...