The Local Group is the gravitationally bound group of galaxies dominated by the Milky Way and Andromeda, each with its satellite galaxies. A galaxy cluster is one of the largest gravitationally bound systems: many galaxies held, with a hot gas that radiates X-rays, in a common well of mostly dark matter.
বইগুলো এখনো বাংলা ভাষায় পাওয়া যায় না — ইংরেজি সংস্করণ দেখানো হচ্ছে।
Earth and Space Sciences · পরিভাষা
Local Group; galaxy cluster কী?
অন্য নাম: Local Group · galaxy cluster