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Swiss-cheese model of the cosmos is full of holes

发布时间:2019-03-14 06:03:01来源:未知点击:

By Anil Ananthaswamy A UNIVERSE riddled with holes would do away with the need for dark energy. Unfortunately that idea itself now seems to have a few holes. In 1998, astronomers found that distant supernovae were dimmer, and thus farther away, than expected. According to the standard model of cosmology, which assumes that the universe is homogenous on large scales, this suggested that the expansion of the universe was speeding up. That acceleration was attributed to a mysterious “dark energy” inherent in the fabric of space-time. Then, last year, Edward Kolb of the Fermi National Accelerator Laboratory in Batavia, Illinois,