Astronomers are now using entire galaxies as lenses to look at other galaxies, providing them with precise tool to measure the size and age of the universe and how rapidly it is expanding. The measurement determines a value for the…
Astronomers are now using entire galaxies as lenses to look at other galaxies, providing them with precise tool to measure the size and age of the universe and how rapidly it is expanding. The measurement determines a value for the…
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