Relics of our Milky Way

Mai ka hoʻomaka ʻana o ka moʻomeheu, ua hoʻāʻo nā ʻepekema e wehe i nā mea huna o kā mākou galaxy. ʻOiai he nui nā ʻano hanana i kahi mamao loa, hiki i kēia mau ʻike ke hoʻomālamalama i ko mākou ʻike no ka Milky Way. ʻO kekahi pūʻulu hoku mamao, no ka laʻana, ua loaʻa i ka manaʻo o nā noʻonoʻo he nui. Ua ʻike kekahi hui o nā kilo hōkū honua i ka mea hiki ke hoʻopaʻa i ka ʻokoʻa ma waena o ka wā i hala a me kēia manawa o kā mākou galaxy: kahi relic fossil o ka Milky Way mua.

He aha ka relic o Outer Space?

ʻO ka hui hōkū ʻike hou ʻia o ka Milky Way, Terzan 5, he 19,000 km mai ka Honua aku. Wahi a Francesco Ferraro mai ke Kulanui o Bologna ma Italia a me ka mea kākau alakaʻi o ke aʻo ʻana, hiki i kēia ʻike ke "hōʻike i kahi pilina hoihoi ma waena o ka honua a me kahi mamao, he mea hōʻike ola o ke kaʻina hui hui Galactic bulge." I nā huaʻōlelo ʻē aʻe, hiki iā Terzan 5 ke kōkua iā mākou e hoʻomaopopo maikaʻi i ke kaʻina hana galaxy, a ʻo ia hoʻi, pehea ka nui o kēlā ʻano nui e ola me ka ʻole o kēia mau makahiki he 12 biliona.

Wahi a David Shiga, aia ʻekolu heluna heluna o nā hōkū mai nā wā like ʻole ʻo ia, e like me kāna ʻōlelo ʻana, hiki ke "he mau ʻumi miliona mau makahiki [ka makahiki] kēlā me kēia." Hāʻawi ʻia i ka wahi a me ka makahiki o ka puʻupuʻu honua, ʻōlelo ʻo Shiga e hiki paha iā Terzan 5 ke hōʻike i kahi galaxy mua i noho ma mua o ka Milky Way. ʻO nā mea i koe e hiki ke hōʻike i ka "ʻoki ʻia" e ka hana ʻana o kā mākou galaxy home.

Pehea e noho ai kahi relic i loko o ko kākou Universe?

Wahi a Polofesa Dr. H. M. Schmid ma ka Institute for Astronomy ma Zurich, nā galaxies "ua hānau ʻia e ka hui ʻana o nā mea baryonic i loko o nā pūnāwai e ulu ana o ka ʻike ʻana o nā mea ʻeleʻele i loko o ke ao holoʻokoʻa." I ka ulu ʻana o nā galaxies, hele lākou i nā kaʻina hana e like me ka hui ʻana i nā kinoea e hana i nā hoku nui a me ka launa pū ʻana me nā galaxies ʻē aʻe.

Hoʻokumu ʻia nā hōkū ma hope o ka hāʻule ʻana o nā ao kinoea nui e hoʻolilo i ka hapa nui o ko lākou ikaika i ka wā o kahi pahū Supernova; ma hope o ka pahū ʻana, hoʻopau nā kinoea i loko o ke ao holoʻokoʻa e hana, e like me kā Dr. Schmid i ʻōlelo ai, "he hanauna hou o nā hōkū."

He aha ke ʻano o kēia no mākou?

Me ka puʻupuʻu hou i ʻike ʻia, ʻo Terzan 5, hiki i ka poʻe astronomers ke hoʻomaopopo maikaʻi i ka paʻakikī e pili ana i ka hoʻokumu ʻana o nā galaxy, ʻaʻole wale no ka Milky Way akā no nā ʻano galaxes like ʻole e noho pū ana i loko o ka Universe. Eia kekahi, ʻo ka holomua me Terzan 5 e hiki ai i nā astronomers ke noʻonoʻo e pili ana i ka wā i hala o ke ao, a no laila, e hoʻokumu i nā kuhiakau e pili ana i ka Universe a me kā mākou galaxy e hiki mai ana.

Ua ʻōlelo ʻo Astronomer Piotto mai ke Kulanui o Padua ma Italia, "ʻaʻole maʻalahi nā hōkū e like me kā mākou aʻo ʻana i kā mākou mau haumāna." ʻAʻole wale nā ​​mea hou aʻe e aʻo ai e pili ana i ka lani i ke ao a me ka pō, akā ʻaʻohe palena o ka mea e hiki ai i nā poʻe akamai ke ʻike e pili ana i ko mākou mōʻaukala ma ke ʻano he mau mea ola; ʻoiai, hoʻokahi wale nō mākou honua i loko o ka galaxy holoʻokoʻa.