Ma kahi o ʻeono piliona makahiki mai kēia manawa aku, ʻo kā mākou ʻanuʻu home ʻo Milky Way (MW) a me Andromeda galaxy e pili ana (M 31) e hui pū kekahi me kekahi e ulu ana i kahi galaxy elliptical hui hou. ʻO kēia ka ʻike e pili ana i ka wā e hiki mai ana o kā mākou home galaxy Milky Way. Eia nō naʻe, me ka hoʻohana ʻana i ka ʻikepili mai nā ʻike hou loa e ka Gaia a me Hubble space telescopes, ua ʻike nā mea noiʻi ʻaʻole hiki ke pale ʻia ka hui ʻana o Milky Way-Andromeda. ʻAʻole pono e hui ʻia nā galaxia ʻelua a kokoke i ka 50 %.
He aha ka mea e hiki mai ana i ka Honua, i ka Lā a me ko mākou galaxy home i ka wā e hiki mai ana? ʻAʻole lākou e noho mau i ko lākou ʻano. E noho mau ka honua no 4 biliona makahiki hou inā ʻaʻole i luku ʻia e ke kanaka a i ʻole nā pōʻino kūlohelohe e like me ke kaua nuklea, ka hoʻololi ʻana i ke aniau, ka hopena me ka asteroid, ka lua pele nui, a pēlā aku. ʻO ka piʻi ʻana o ke kaomi ma muli o ka hāʻule ʻana o ke kumu e hoʻoulu ai i ka hui nuklea o nā mea kaumaha i loko o ke kumu. ʻO ka hopena, e piʻi aʻe ka mahana o ka Lā, a e hoʻonui nui ʻia ka ʻaoʻao o waho o ka lewa o ka lā ma waho o ka lewa a e hoʻopau i nā hōkū kokoke me ka Honua. E hoʻomau ʻia kēia pae nunui ʻulaʻula ma kahi o hoʻokahi piliona makahiki. ʻO ka hopena, e hāʻule ka Lā a lilo i keʻokeʻo keʻokeʻo.
No ko mākou home galaxy Milky Way (MW), ʻo ka ʻike i kēia manawa ʻo ka ulu ʻana o ka Local Group (LG) i loaʻa ma mua o 80 galaxies e komo pū ana me nā galaxes nui ʻelua Milky Way (MW) a me ka Andromeda galaxy (M 31) e alakaʻi ʻia e ka dynamics o ka Milky Way a me ka Andromeda galaxy system. I loko o ʻehā piliona makahiki mai kēia manawa aku, ʻo ka galaxy Andromeda kokoke i kēia manawa e kū nei ma kahi o 2.5 miliona mau makahiki māmā ka mamao e hui pū me kā mākou galaxy home ma 250,000 mph. Ua manaʻo ʻia ua hoʻomaka paha ke kaʻina hana, a aia paha nā galaxia ʻelua ma kahi papa kuʻi. E mau ana ka paio no 2 biliona makahiki a i ka hopena, e hui ana na galaxia elua i loko o eono biliona makahiki mai keia manawa aku e hoala mai ai i kahi galaxy elliptical hui hou. E ola ana ka ʻōnaehana solar a me ka Honua i ka hoʻohui ʻana akā loaʻa nā hoʻonohonoho hou i ka lewa.
Me he mea lā he kuʻikahi i waena o nā poʻe akamai e pili ana i ka ʻoiaʻiʻo o ka hui ʻana a me ka hui ʻana o Milky Way me nā aniani Andromeda kokoke i ka hui kūloko. Manaʻo ʻia e hui pū nā mea ʻelua me kekahi i ka wā e hiki mai ana e hoʻokumu i kahi galaxy hui. Eia naʻe, ua hōʻike ʻia kahi noiʻi hou ʻaʻole hiki ke hoʻokuʻi ʻia.
Me ka hoʻohana ʻana i ka ʻikepili mai nā ʻike hou loa e ka Gaia a me Hubble space telescopes, ua noiʻi nā mea noiʻi pehea e ulu ai ka hui kūloko i nā makahiki he 10 piliona e hiki mai ana. Ua ʻike lākou ʻo nā galaxia nui ʻelua ʻē aʻe i loko o ka Pūʻulu Kūloko ʻo M33 a me ka Large Magellanic Cloud e hoʻoikaika nui i ka orbit Milky Way–Andromeda. Eia hou, holo pololei ka orbit o ka Large Magellanic Cloud galaxy i ka Milky Way–Andromeda orbit i mea e emi mai ai ka hui 'ana a me ka hui 'ana o Milky Way a me Andromeda. Ua ʻike nā mea noiʻi ʻaʻole hiki ke pale ʻia ka hui ʻana o Milky Way-Andromeda. ʻAʻole pono e hui ʻia nā galaxia ʻelua a kokoke i ka 50 %.
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E hoʻomaopopo ':
- Schiavi R. et al 2020. ʻO ka hui ʻana o ka Milky Way me ka Andromeda galaxy a me ka hopena o kā lākou mau lua ʻeleʻele supermassive. Astronomy & Astrophysics Volume 642, ʻOkakopa 2020. Paʻi ʻia 01 ʻOkakopa 2020. DOI: https://doi.org/10.1051/0004-6361/202038674
- Sawala, T., Delhomelle, J., Deason, AJ et al. ʻAʻohe ʻoiaʻiʻo o ka hui ʻana o Milky Way-Andromeda. Nat Astron (2025). Published: 02 June 2025. DOI: https://doi.org/10.1038/s41550-025-02563-1
- ESA/Hubble Science. Ke kānalua nei ʻo Hubble i ka ʻoiaʻiʻo o ka hui ʻana o ka galactic. Hoʻopuka ʻia 2 Iune 2025. Loaʻa ma https://esahubble.org/news/heic2508/
- ESA. ʻIke hou ʻo Hubble lāua ʻo Gaia i ka hopena o kā mākou galaxy. Hoʻopuka ʻia 2 Iune 2025. Loaʻa ma https://www.esa.int/Science_Exploration/Space_Science/Hubble_and_Gaia_revisit_fate_of_our_galaxy
- NASA. Apocalypse I ka manawa hea? Kālua ʻo Hubble i ka ʻoiaʻiʻo o ka hui ʻana o Galactic. Hoʻopuka ʻia 2 Iune 2025. Loaʻa ma https://science.nasa.gov/missions/hubble/apocalypse-when-hubble-casts-doubt-on-certainty-of-galactic-collision/
- Kulanui o Helsinki. Hoʻokuʻu paʻi - ʻAʻohe ʻoiaʻiʻo e pili ana i ka hui ʻana o Milky Way - Andromeda. Hoʻopuka ʻia 02 Iune 2025. Loaʻa ma https://www.helsinki.fi/en/news/space/no-certainty-about-predicted-milky-way-andromeda-collision
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Nā mea e pili pū ana
- Pehea ka ʻike ʻia ʻana o kahi Supernova ma mua o ʻewalu mau kenekulia i hala e hoʻololi ai i ko mākou ʻike (14 Iulai 2024)
- ʻO ka Moʻolelo o ka Home Galaxy: ʻElua mau hale kūkulu mua i ʻike ʻia a kapa ʻia ʻo Shiva lāua ʻo Shakti (25 Malaki 2024)
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 and the neighbouring Andromeda galaxy (M 31) will collide and merge with each other giving rise to a new combined elliptical galaxy. This is the current understanding about future of our home galaxy Milky Way. However, using data from the latest observations by the Gaia and Hubble space telescopes, researchers have found that Milky Way-Andromeda collision is far less inevitable. The two galaxies may not necessarily merge and the probability of “no Milky Way–Andromeda merger” scenario is close to 50 %.){kind=link}