What would you name this massive galaxy cluster? Despite its beauty, it bears the distinctly unpoetic name of PLCK G308.3-20.2. Galaxy clusters can contain thousands of galaxies all held together by the glue of gravity. At one point in time they were believed to be the largest structures in the universe — until they were usurped in the 1980s by the discovery of superclusters. These massive formations typically contain dozens of galaxy clusters and groups and span hundreds of millions of light-years. However, clusters do have one thing to cling on to: superclusters are not held together by gravity, so galaxy clusters still retain the title of the biggest structures in the universe bound by gravity. Credit: ESA/@NasaHubble/NASA #NASA #space #astronomy #hubbletelescope #solarsystem #potd #galaxies #clusters #stars #gravity #universe #lightyears

nasaさん(@nasa)が投稿した動画 -

NASAのインスタグラム(nasa) - 4月20日 08時04分


What would you name this massive galaxy cluster? Despite its beauty, it bears the distinctly unpoetic name of PLCK G308.3-20.2.

Galaxy clusters can contain thousands of galaxies all held together by the glue of gravity. At one point in time they were believed to be the largest structures in the universe — until they were usurped in the 1980s by the discovery of superclusters.
These massive formations typically contain dozens of galaxy clusters and groups and span hundreds of millions of light-years. However, clusters do have one thing to cling on to: superclusters are not held together by gravity, so galaxy clusters still retain the title of the biggest structures in the universe bound by gravity.

Credit: ESA/@NasaHubble/NASA

#NASA #space #astronomy #hubbletelescope #solarsystem #potd #galaxies #clusters #stars #gravity #universe #lightyears


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