{"id":7778,"date":"2010-11-18T14:08:02","date_gmt":"2010-11-18T14:08:02","guid":{"rendered":"https:\/\/chanhkien.org\/?p=7778"},"modified":"2025-05-12T10:28:18","modified_gmt":"2025-05-12T03:28:18","slug":"hoat-dong-no-sao-dang-ket-thuc-trong-mot-thien-ha-lan-can","status":"publish","type":"post","link":"https:\/\/chanhkien.org\/2010\/11\/hoat-dong-no-sao-dang-ket-thuc-trong-mot-thien-ha-lan-can.html","title":{"rendered":"Ho\u1ea1t \u0111\u1ed9ng n\u1ed5 sao \u0111ang k\u1ebft th\u00fac trong m\u1ed9t thi\u00ean h\u00e0 l\u00e2n c\u1eadn"},"content":{"rendered":"<div id=\"attachment_7779\" style=\"width: 360px\" class=\"wp-caption aligncenter\">\n<a href=\"https:\/\/chanhkien.org\/wp-content\/uploads\/2010\/11\/StarSburst.jpg\"><img decoding=\"async\" aria-describedby=\"caption-attachment-7779\" class=\"size-full wp-image-7779\" title=\"StarSburst\" src=\"https:\/\/chanhkien.org\/wp-content\/uploads\/2010\/11\/StarSburst.jpg\" alt=\"\" width=\"350\" height=\"262\" srcset=\"https:\/\/chanhkien.org\/wp-content\/uploads\/2010\/11\/StarSburst.jpg 350w, https:\/\/chanhkien.org\/wp-content\/uploads\/2010\/11\/StarSburst-300x224.jpg 300w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a><\/p>\n<p id=\"caption-attachment-7779\" class=\"wp-caption-text\">KH\u00d4NG C\u00d2N N\u1ed4 SAO N\u1eeeA: H\u00ecnh \u1ea3nh n\u00e0y c\u1ee7a Thi\u00ean h\u00e0 NGC 2976 \u0111\u01b0\u1ee3c ch\u1ee5p t\u1eeb k\u00ednh thi\u00ean v\u0103n v\u0169 tr\u1ee5 Hubble g\u1ee3i \u00fd r\u1eb1ng qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh sao c\u1ee7a n\u00f3 \u0111ang k\u1ebft th\u00fac. (\u1ea2nh: Space Telescope Science Institute)<\/p>\n<\/div>\n<p>C\u00e1c h\u00ecnh \u1ea3nh t\u1eeb k\u00ednh thi\u00ean v\u0103n v\u0169 tr\u1ee5 Hubble cho th\u1ea5y \u0111i\u1ec1u d\u01b0\u1eddng nh\u01b0 l\u00e0 s\u1ef1 k\u1ebft th\u00fac c\u1ee7a qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh sao \u0111\u1ed1i v\u1edbi m\u1ed9t thi\u00ean h\u00e0 h\u00ecnh xo\u1eafn \u1ed1c t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf c\u00e1ch tr\u00e1i \u0111\u1ea5t 12 tri\u1ec7u n\u0103m \u00e1nh s\u00e1ng. N\u00f3 l\u00e0 thi\u00ean h\u00e0 l\u00f9n NFC 2976 (dwarf Galaxy NGC 2976) thu\u1ed9c nh\u00f3m M81 (M81 Group), m\u1ed9t ch\u00f9m thi\u00ean h\u00e0 trong ch\u00f2m sao \u0110\u1ea1i H\u00f9ng (Ursa Major), g\u1ea7n v\u1edbi Nh\u00f3m \u0110\u1ecba ph\u01b0\u01a1ng (the Local Group). Nh\u00f3m \u0110\u1ecba ph\u01b0\u01a1ng n\u00e0y l\u00e0 m\u1ed9t ch\u00f9m thi\u00ean h\u00e0 bao g\u1ed3m D\u1ea3i Ng\u00e2n h\u00e0 [c\u1ee7a ch\u00fang ta] (the Milky Way).<\/p>\n<p>Ph\u00e1t hi\u1ec7n m\u1edbi n\u00e0y \u0111\u00e3 khi\u1ebfn c\u00e1c nh\u00e0 khoa h\u1ecdc b\u0103n kho\u0103n, b\u1edfi v\u00ec Nh\u00f3m M81 c\u00f3 \u0111\u1eb7c t\u00ednh l\u00e0 c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn ho\u1ea1t \u0111\u1ed9ng n\u1ed5 sao (hay s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a nhi\u1ec1u ng\u00f4i sao). Lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng n\u00e0y th\u01b0\u1eddng x\u1ea3y ra sau m\u1ed9t s\u1ef1 g\u1eb7p nhau \u1edf kho\u1ea3ng c\u00e1ch g\u1ea7n gi\u1eefa hai thi\u00ean h\u00e0 ho\u1eb7c khi ch\u00fang va ch\u1ea1m v\u00e0o nhau.<\/p>\n<p>C\u00e1c nh\u00e0 khoa h\u1ecdc v\u1eabn ch\u01b0a hi\u1ec3u th\u1ea5u \u0111\u00e1o v\u1ec1 c\u00e1c c\u01a1 ch\u1ebf ph\u1ee9c t\u1ea1p li\u00ean quan trong s\u1ef1 h\u00ecnh th\u00e0nh sao, nh\u01b0ng h\u1ecd tin r\u1eb1ng s\u1ef1 t\u01b0\u01a1ng t\u00e1c g\u1ea7n gi\u1eefa c\u00e1c thi\u00ean h\u00e0 c\u00f3 th\u1ec3 khi\u1ebfn ch\u00fang quay kh\u00f4ng \u1ed5n \u0111\u1ecbnh, l\u00e0m cho kh\u00ed gas chuy\u1ec3n \u0111\u1ed9ng v\u1ec1 ph\u00eda t\u00e2m thi\u00ean h\u00e0. Sau \u0111\u00f3 kh\u00ed gas n\u00e0y t\u1eadp trung v\u00e0o t\u00e2m v\u00e0 k\u00edch ho\u1ea1t c\u00e1c v\u1ee5 n\u1ed5 h\u00ecnh th\u00e0nh sao.<\/p>\n<p>NGC 2976 c\u00f3 th\u1ec3 \u0111\u00e3 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c thi\u00ean h\u00e0 l\u1edbn h\u01a1n v\u00e0o kho\u1ea3ng 500 tri\u1ec7u n\u0103m tr\u01b0\u1edbc, l\u00e0m c\u1eaft r\u1eddi kh\u00ed gas t\u1eadp trung b\u00ean trong n\u00f3, khi\u1ebfn cho m\u1ed9t ph\u1ea7n kh\u00ed gas n\u00e0y \u0111i ra kh\u1ecfi thi\u00ean h\u00e0 v\u00e0 ph\u1ea7n c\u00f2n l\u1ea1i \u0111i v\u00e0o trong ph\u1ea7n nh\u00e2n.<\/p>\n<p>Ph\u1ea7n kh\u00ed t\u1eadp trung \u1edf nh\u1eefng l\u1edbp b\u00ean ngo\u00e0i thi\u00ean h\u00e0 b\u00e2y gi\u1edd \u0111\u00e3 ng\u1eebng sinh ra c\u00e1c ng\u00f4i sao m\u1edbi, nh\u01b0ng ho\u1ea1t \u0111\u1ed9ng sinh sao \u1edf ph\u1ea7n nh\u00e2n [thi\u00ean h\u00e0] v\u1eabn c\u00f2n n\u1ed5i b\u1eadt.<\/p>\n<p>M\u1eb7c d\u00f9 NGC 2976 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t thi\u00ean h\u00e0 xo\u1eafn \u1ed1c, nh\u01b0ng c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 kh\u00e1 b\u1ea5t th\u01b0\u1eddng, v\u00ec n\u00f3 thi\u1ebfu c\u00e1c c\u00e1nh tay xo\u1eafn v\u00e0 kh\u00f4ng c\u00f3 h\u00ecnh d\u1ea1ng trung t\u00e2m m\u00e0 c\u00e1c thi\u00ean h\u00e0 c\u00f9ng lo\u1ea1i c\u00f3 xu h\u01b0\u1edbng c\u00f3.<\/p>\n<p>\u201cThi\u00ean h\u00e0 n\u00e0y tr\u00f4ng r\u1ea5t k\u1ef3 d\u1ecb, b\u1edfi v\u00ec m\u1ed9t t\u01b0\u01a1ng t\u00e1c v\u1edbi Nh\u00f3m M81 kho\u1ea3ng m\u1ed9t t\u1ec9 n\u0103m tr\u01b0\u1edbc \u0111\u00e3 l\u00e0m tu\u1ed9t \u0111i m\u1ea5t m\u1ed9t l\u01b0\u1ee3ng kh\u00ed kh\u1ecfi c\u00e1c ph\u1ea7n ngo\u00e0i c\u1ee7a thi\u00ean h\u00e0 n\u00e0y, bu\u1ed9c ph\u1ea7n kh\u00ed c\u00f2n l\u1ea1i ti\u1ebfn nhanh v\u1ec1 ph\u00eda trung t\u00e2m c\u1ee7a thi\u00ean h\u00e0, n\u01a1i n\u00f3 c\u00f3 \u00edt c\u1ea5u tr\u00fac h\u00ecnh xo\u1eafn \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c,\u201d ti\u1ebfn s\u0129 Benjamin Williams, m\u1ed9t nh\u00e0 thi\u00ean v\u0103n h\u1ecdc c\u1ee7a tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc University of Washington t\u1ea1i Seatle v\u00e0 l\u00e0 gi\u00e1m \u0111\u1ed1c nghi\u00ean c\u1ee9u Hubble n\u00f3i trong m\u1ed9t th\u00f4ng c\u00e1o b\u00e1o ch\u00ed.<\/p>\n<p>M\u1eb7c d\u00f9 tr\u01b0\u1eddng h\u1ee3p c\u1ee7a NGC 2976 l\u00e0 kh\u00e1 hi\u1ebfm, ti\u1ebfn s\u0129 Williams tin r\u1eb1ng c\u00f3 nh\u1eefng thi\u00ean h\u00e0 l\u00f9n \u0111\u00e3 b\u1ecb \u1ea3nh h\u01b0\u1edfng theo nh\u1eefng c\u00e1ch t\u01b0\u01a1ng t\u1ef1 b\u1edfi c\u00e1c thi\u00ean h\u00e0 l\u00e2n c\u1eadn. Tuy nhi\u00ean, v\u1eabn ch\u01b0a ch\u1ee9ng minh \u0111\u01b0\u1ee3c r\u1eb1ng hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 ph\u1ed5 bi\u1ebfn, tr\u1eeb khi k\u00ednh thi\u00ean v\u0103n Hubble c\u00f3 th\u1ec3 \u0111\u1ecbnh v\u1ecb m\u1ed9t thi\u00ean h\u00e0 l\u00f9n kh\u00e1c trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 nghi\u00ean c\u1ee9u.<\/p>\n<p>\u0110\u1ecdc b\u1ea3n b\u00e1o c\u00e1o nghi\u00ean c\u1ee9u t\u1ea1i <a href=\"http:\/\/arxiv.org\/abs\/0911.4121\" target=\"_blank\">http:\/\/arxiv.org\/abs\/0911.4121<\/a><\/p>\n<p style=\"text-align: right;\">(Theo <em>The Epoch Times<\/em>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1c h\u00ecnh \u1ea3nh t\u1eeb k\u00ednh thi\u00ean v\u0103n v\u0169 tr\u1ee5 Hubble cho th\u1ea5y \u0111i\u1ec1u d\u01b0\u1eddng nh\u01b0 l\u00e0 s\u1ef1 k\u1ebft th\u00fac c\u1ee7a qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh sao \u0111\u1ed1i v\u1edbi m\u1ed9t thi\u00ean h\u00e0 h\u00ecnh xo\u1eafn \u1ed1c t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf c\u00e1ch tr\u00e1i \u0111\u1ea5t 12 tri\u1ec7u n\u0103m \u00e1nh s\u00e1ng.<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[84],"tags":[48],"class_list":["post-7778","post","type-post","status-publish","format-standard","hentry","category-vu-tru-hoc","tag-khoa-hoc-vu-tru"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - 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