<<返回上一页

Cosmic hole defies dark matter theories

发布时间:2019-03-14 07:06:14来源:未知点击:

FROM an intergalactic pile-up comes the disturbing suggestion that mysterious dark matter is even more puzzling than we thought. The massive galaxy cluster Abell 520, some 3 billion light years away, is thought to have formed from a collision between smaller clusters. When astronomers examined the wreckage, they found that Abell 520 has a massive dark core, empty of bright galaxies (www.arxiv.org/abs/0706.3048). Some of the core is made up of hot gas,