{"id":11071,"date":"2021-11-22T17:40:16","date_gmt":"2021-11-22T10:40:16","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=11071"},"modified":"2021-11-23T21:13:17","modified_gmt":"2021-11-23T14:13:17","slug":"van-toc-cua-sao-choi-halley-la-bao-nhieu-km-s","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/van-toc-cua-sao-choi-halley-la-bao-nhieu-km-s\/","title":{"rendered":"V\u1eadn t\u1ed1c c\u1ee7a sao Ch\u1ed5i Halley l\u00e0 bao nhi\u00eau km\/s?"},"content":{"rendered":"\n<p>C\u0169ng nh\u01b0 Tr\u00e1i \u0111\u1ea5t, sao ch\u1ed5i Halley c\u0169ng chuy\u1ec3n \u0111\u1ed9ng tr\u00ean m\u1ed9t qu\u1ef9 \u0111\u1ea1o quanh M\u1eb7t tr\u1eddi. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 qu\u1ef9 \u0111\u1ea1o c\u1ee7a Tr\u00e1i \u0111\u1ea5t l\u00e0 h\u00ecnh elip g\u1ea9n tr\u00f2n, c\u00f2n qu\u1ef9 \u0111\u1ea1o c\u1ee7a sao ch\u1ed5i Halley l\u00e0 h\u00ecnh elip d\u1eb9t. \u0110i\u1ec3m m\u00e0 sao ch\u1ed5i Halley g\u1ea9n M\u1eb7t tr\u1eddi nh\u1ea5t (\u0111i\u1ec3m c\u1eadn nh\u1eadt) c\u00e1ch M\u1eb7t tr\u1eddi 90 tri\u1ec7u kilom\u00e9t, qua gi\u1eefa qu\u1ef9 \u0111\u1ea1o sao Thu\u1ef7 v\u00e0 sao Kim, \u0111i\u1ec3m xa M\u1eb7t tr\u1eddi nh\u1ea5t (\u0111i\u1ec3m vi\u1ec5n nh\u1eadt) c\u00e1ch xa M\u1eb7t tr\u1eddi 5 t\u1ef7 295 tri\u1ec7u kilom\u00e9t, so v\u1edbi kho\u1ea3ng c\u00e1ch gi\u1eefa qu\u1ef9 \u0111\u1ea1o c\u1ee7a sao H\u1ea3i v\u01b0\u01a1ng tinh l\u00e0 h\u00e0nh tinh xa M\u1eb7t tr\u1eddi (l\u00e0 4,5 t\u1ef7 kilom\u00e9t) th\u00ec c\u00f2n xa h\u01a1n.<\/p>\n\n\n\n<p>Chu k\u1ef3 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a sao ch\u1ed5i Halley quanh M\u1eb7t tr\u1eddi l\u00e0 76 n\u0103m. Khi bay xa M\u1eb7t tr\u1eddi \u0111\u1ebfn g\u1ea9n \u0111i\u1ec3m vi\u1ec5n nh\u1eadt sao ch\u1ed5i bay v\u1edbi t\u1ed1c \u0111\u1ed9 0.91 km\/s t\u1ee9c 3280 m\/s. N\u1ebfu so v\u1edbi v\u1eadn t\u1ed1c \u00e2m thanh tr\u00ean m\u1eb7t Tr\u00e1i \u0111\u1ea5t l\u00e0 340 m\/s th\u00ec t\u1ed1c \u0111\u1ed9 c\u1ee7a thi\u00ean th\u1ec3 n\u00e0y g\u1ea5p 2,7 l\u1ea9n t\u1ee9c l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi t\u1ed1c \u0111\u1ed9 m\u00e1y bay si\u00eau thanh c\u1ea5p 2,7.<\/p>\n\n\n\n<p>Khi sao ch\u1ed5i Halley t\u1eeb \u0111i\u1ec3m vi\u1ec5n nh\u1eadt bay tr\u1edf v\u1ec1, th\u00ec khi c\u00e0ng bay g\u1ea9n \u0111\u1ebfn M\u1eb7t tr\u1eddi, t\u1ed1c \u0111\u1ed9 bay c\u1ee7a n\u00f3 c\u00e0ng nhanh. Khi \u0111\u1ebfn g\u1ea9n \u0111i\u1ec3m c\u1eadn nh\u1eadt, g\u1ea9n qu\u1ef9 \u0111\u1ea1o c\u1ee7a sao Kim, t\u1ed1c \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed9ng s\u1ebd l\u00e0 54,3 km\/s t\u1ee9c c\u0169ng l\u00e0 195.500 km\/gi\u1edd.<\/p>\n\n\n\n<p>V\u1edbi Tr\u00e1i \u0111\u1ea5t t\u1ed1c \u0111\u1ed9 t\u1ea1i \u0111i\u1ec3m c\u1eadn nh\u1eadt v\u00e0 \u0111i\u1ec3m vi\u1ec5n nh\u1eadt sai kh\u00e1c nhau kh\u00f4ng nhi\u1ec1u. V\u00e0o ng\u00e0y 04\/01 l\u00e0 \u0111i\u1ec3m c\u1eadn nh\u1eadt th\u00ec t\u1ed1c \u0111\u1ed9 l\u00e0 35,6 km\/s, c\u00f2n ng\u00e0y 04\/07 l\u00e0 \u0111i\u1ec3m vi\u1ec5n nh\u1eadt th\u00ec t\u1ed1c \u0111\u1ed9 s\u1ebd l\u00e0 34,79 km\/s.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u0169ng nh\u01b0 Tr\u00e1i \u0111\u1ea5t, sao ch\u1ed5i Halley c\u0169ng chuy\u1ec3n \u0111\u1ed9ng tr\u00ean m\u1ed9t qu\u1ef9 \u0111\u1ea1o quanh M\u1eb7t tr\u1eddi. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 qu\u1ef9 \u0111\u1ea1o c\u1ee7a Tr\u00e1i \u0111\u1ea5t l\u00e0 h\u00ecnh elip g\u1ea9n tr\u00f2n, c\u00f2n qu\u1ef9 \u0111\u1ea1o c\u1ee7a sao ch\u1ed5i Halley l\u00e0 h\u00ecnh elip d\u1eb9t. \u0110i\u1ec3m m\u00e0 sao ch\u1ed5i Halley g\u1ea9n M\u1eb7t tr\u1eddi nh\u1ea5t (\u0111i\u1ec3m c\u1eadn nh\u1eadt) c\u00e1ch [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1,15],"tags":[],"class_list":["post-11071","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=11071"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11071\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=11071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=11071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=11071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}