ve ction . ▁ ▁Red ▁gi ants ▁are ▁stars ▁that ▁have ▁expanded ▁their ▁outer ▁en velope ▁in ▁order ▁to ▁support ▁the ▁nuclear ▁fusion ▁of ▁hel ium . ▁This ▁moves ▁them ▁up ▁and ▁to ▁the ▁right ▁on ▁the ▁H - R ▁diagram . ▁However , ▁they ▁are ▁const rained ▁by ▁the ▁Hay ashi ▁limit ▁not ▁to ▁expand ▁beyond ▁a ▁certain ▁radius . ▁ ▁The ▁Hay ashi ▁limit ▁is ▁named ▁after ▁Ch ū sh ir ō ▁Hay ashi , ▁a ▁Japanese ▁ast ro phys ic ist . ▁ ▁See ▁also ▁ ▁Hay ashi ▁track ▁ ▁Edd ington ▁limit ▁ ▁References ▁ ▁Category : St ell ar ▁evolution ▁Category : A st ro physics <0x0A> </s> ▁The ▁E phr ata ▁Clo ister ▁or ▁E phr ata ▁Community ▁was ▁a ▁religious ▁community , ▁established ▁in ▁ 1 7 3 2 ▁by ▁Johann ▁Con rad ▁Be iss el ▁at ▁E phr ata , ▁in ▁what ▁is ▁now ▁Lanc aster ▁County , ▁Pennsylvania . ▁The ▁grounds ▁of ▁the ▁community ▁are ▁now ▁owned ▁by ▁the ▁Commonwealth ▁of ▁Pennsylvania ▁and ▁are ▁admin ister ed ▁by ▁the ▁Pennsylvania ▁Historical ▁and ▁Museum ▁Commission . ▁ ▁Marie ▁K ach el ▁Buch er , ▁the ▁last ▁surv iving ▁resident ▁of ▁the ▁E phr ata ▁Clo ister , ▁died ▁on ▁July ▁ 2 7 , ▁ 2 0 0 8 , ▁at ▁the ▁age ▁of ▁ 9 8 . ▁ ▁History ▁The ▁community ▁was ▁desc ended ▁from ▁the ▁p iet istic ▁Schwar zen au ▁Bre th ren ▁movement ▁of ▁Alexander ▁Mack ▁of ▁Schwar zen au ▁in