{"id":28405,"date":"2019-06-04T09:43:00","date_gmt":"2019-06-04T02:43:00","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=28405"},"modified":"2021-10-03T16:02:19","modified_gmt":"2021-10-03T09:02:19","slug":"tim-thay-18-hanh-tinh-ngoai-he-mat-troi-cung-kich-co-trai-dat","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/tim-thay-18-hanh-tinh-ngoai-he-mat-troi-cung-kich-co-trai-dat\/","title":{"rendered":"T\u00ecm th\u1ea5y 18 h\u00e0nh tinh ngo\u00e0i H\u1ec7 M\u1eb7t tr\u1eddi c\u00f9ng k\u00edch c\u1ee1 Tr\u00e1i \u0111\u1ea5t"},"content":{"rendered":"\n

R\u00e0 so\u00e1t di s\u1ea3n t\u1eeb th\u1ee3 s\u0103n h\u00e0nh tinh Kepler \u0111\u00e3 ch\u1ebft c\u1ee7a NASA b\u1eb1ng thu\u1eadt to\u00e1n m\u1edbi, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 t\u00ecm th\u1ea5y c\u00f9ng l\u00fac 18 h\u00e0nh tinh c\u1ee1 tr\u00e1i \u0111\u1ea5t b\u1ecb ch\u00f4n v\u00f9i.<\/h2>\n\n\n\n

Nghi\u00ean c\u1ee9u m\u1edbi ph\u1ed1i h\u1ee3p gi\u1eefa Vi\u1ec7n Nghi\u00ean c\u1ee9u H\u1ec7 m\u1eb7t tr\u1eddi Max Planck, \u0110\u00e0i thi\u00ean v\u0103n Sonneberg, Vi\u1ec7n V\u1eadt l\u00fd thi\u00ean v\u0103n \u2013 \u0110\u1ea1i h\u1ecdc Georg-August (\u0110\u1ee9c) \u0111\u00e3 t\u00ecm ra c\u00f9ng l\u00fac 18\u00a0h\u00e0nh tinh\u00a0l\u1ea1 c\u1ee1 tr\u00e1i \u0111\u1ea5t t\u1eeb d\u1eef li\u1ec7u c\u1ee7a K\u00ednh vi\u1ec5n v\u1ecdng kh\u00f4ng gian Kepler. Ph\u00e1t hi\u1ec7n tr\u00ean nh\u1edd v\u00e0o m\u1ed9t thu\u1eadt to\u00e1n m\u1edbi si\u00eau vi\u1ec7t h\u01a1n gi\u00fap t\u00ecm ra c\u1ea3 nh\u1eefng h\u00e0nh tinh \u0111\u01b0\u1ee3c t\u1edd\u00a0Space\u00a0<\/em>m\u00f4 t\u1ea3 l\u00e0 “b\u1ecb ch\u00f4n v\u00f9i”.<\/p>\n\n\n\n

\"Ph\u00e1t<\/figure>\n\n\n\n

18 ngo\u1ea1i h\u00e0nh tinh c\u1ee1 tr\u00e1i \u0111\u1ea5t \u0111\u01b0\u1ee3c \u0111em so s\u00e1nh v\u1edbi tr\u00e1i \u0111\u1ea5t (Earth) v\u00e0 Sao H\u1ea3i V\u01b0\u01a1ng (m\u00e0u xanh). Trong \u0111\u00f3, h\u00e0nh tinh m\u00e0u xanh l\u00e1 c\u00e2y l\u00e0 h\u00e0nh tinh duy nh\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh thu\u1ed9c v\u00f9ng c\u00f3 th\u1ec3 s\u1ed1ng \u0111\u01b0\u1ee3c – \u1ea3nh do nh\u00f3m nghi\u00ean c\u1ee9u cung c\u1ea5p<\/p>\n\n\n\n

Thu\u1eadt to\u00e1n nh\u1eafm v\u00e0o hi\u1ec7n t\u01b0\u1ee3ng “\u0111\u01b0\u1eddng cong \u00e1nh s\u00e1ng” x\u1ea3y ra v\u1edbi ng\u00f4i sao m\u1eb9. Cho d\u00f9 h\u00e0nh tinh \u0111\u00f3 qu\u00e1 m\u1edd nh\u1ea1t v\u00e0 nh\u1ecf b\u00e9, “b\u1ecb ch\u00f4n v\u00f9i” trong qu\u1ea7ng s\u00e1ng t\u1ecfa ra t\u1eeb sao m\u1eb9 nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 \u0111\u1ec3 l\u1ea1i d\u1ea5u v\u1ebft khi \u0111i ngang m\u1eb7t ng\u00f4i sao m\u1eb9, b\u1eb1ng c\u00e1ch ch\u1eb7n m\u1ed9t ph\u1ea7n \u00e1nh s\u00e1ng v\u00e0 l\u00e0m ng\u00f4i sao m\u1eb9 m\u1edd \u0111i m\u1ed9t ch\u00fat.<\/p>\n\n\n\n

Th\u00eam m\u1ed9t ch\u00fat t\u00ednh to\u00e1n d\u1ef1a v\u00e0o \u0111\u01b0\u1eddng cong \u00e1nh s\u00e1ng n\u00e0y, c\u00e1c nh\u00e0 khoa h\u1ecdc kh\u00f4ng nh\u1eefng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a h\u00e0nh tinh \u0111\u00f3 m\u00e0 c\u00f2n hi\u1ec3u bi\u1ebft \u0111\u01b0\u1ee3c ch\u00fat \u00edt v\u1ec1 n\u00f3, v\u00ed d\u1ee5 nh\u01b0 k\u00edch th\u01b0\u1edbc v\u00e0 d\u1ef1 \u0111o\u00e1n kh\u1ea3 n\u0103ng t\u1ed3n t\u1ea1i s\u1ef1 s\u1ed1ng.<\/p>\n\n\n\n

18 h\u00e0nh tinh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u1ea7n n\u00e0y thu\u1ed9c nh\u00f3m h\u00e0nh tinh “k\u00edch c\u1ee1 tr\u00e1i \u0111\u1ea5t”, \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 c\u00f3 k\u00edch th\u01b0\u1edbc t\u1eeb 70% \u0111\u1ebfn g\u1ea5p \u0111\u00f4i h\u00e0nh tinh c\u1ee7a ch\u00fang ta. NASA lu\u00f4n khao kh\u00e1t s\u0103n \u0111\u01b0\u1ee3c c\u00e1c h\u00e0nh tinh d\u1ea1ng n\u00e0y b\u1edfi k\u00edch c\u1ee1 \u0111\u00f3 l\u00e0 m\u1ed9t \u0111i\u1ec3m c\u1ed9ng l\u1edbn cho c\u01a1 h\u1ed9i t\u1ed3n t\u1ea1i s\u1ef1 s\u1ed1ng.<\/p>\n\n\n\n

C\u00e1c t\u00e1c gi\u1ea3 cho bi\u1ebft h\u1ea7u h\u1ebft c\u00e1c h\u00e0nh tinh kh\u00f3 nh\u00ecn th\u1ea5y n\u00e0y n\u1eb1m trong khu v\u1ef1c r\u1ea5t g\u1ea7n sao m\u1eb9, n\u00ean c\u1ef1c n\u00f3ng (l\u00ean t\u1edbi 1.000 \u0111\u1ed9 C) v\u00e0 kh\u00f3 c\u00f3 kh\u1ea3 n\u0103ng gi\u1eef n\u01b0\u1edbc t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng l\u1ecfng. Ch\u1ec9 c\u00f3 1 h\u00e0nh tinh duy nh\u1ea5t quay quanh m\u1ed9t sao l\u00f9n \u0111\u1ecf l\u00e0 thu\u1ed9c v\u00f9ng “c\u00f3 th\u1ec3 \u1edf \u0111\u01b0\u1ee3c”, t\u1ee9c \u0111\u1ee7 kh\u1ea3 n\u0103ng gi\u1eef n\u01b0\u1edbc \u1edf tr\u1ea1ng th\u00e1i l\u1ecfng.javascript:if(typeof(admSspPageRg)!=’undefined’){admSspPageRg.draw(2011327);}else{parent.admSspPageRg.draw(2011327);}<\/p>\n\n\n\n

T\u1ea5t c\u1ea3 c\u00e1c h\u00e0nh tinh n\u00e0y \u0111\u1ec1u l\u00e0 k\u1ebft qu\u1ea3 khai qu\u1eadt \u0111\u01b0\u1ee3c t\u1eeb K2, d\u1eef li\u1ec7u t\u1eeb ch\u01b0\u01a1ng tr\u00ecnh quan s\u00e1t cu\u1ed1i \u0111\u1eddi c\u1ee7a Kepler, tr\u01b0\u1edbc khi k\u00ednh vi\u1ec5n v\u1ecdng kh\u00f4ng gian n\u00e0y ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0o n\u0103m 2018.<\/p>\n\n\n\n

Tr\u01b0\u1edbc khi “ch\u1ebft” \u0111i, Kepler \u0111\u00e3 mang v\u1ec1 cho nh\u00e2n lo\u1ea1i d\u1eef li\u1ec7u v\u1ec1 100.000 ng\u00f4i sao xa x\u00f4i, trong \u0111\u00f3 c\u00f3 \u00edt nh\u1ea5t 517 ng\u00f4i sao l\u00e0 trung t\u00e2m c\u1ee7a m\u1ed9t “h\u1ec7 m\u1eb7t tr\u1eddi” kh\u00e1c, t\u1ee9c c\u00f3 \u00edt nh\u1ea5t 1 h\u00e0nh tinh quay xung quanh.<\/p>\n\n\n\n

Nh\u00f3m nghi\u00ean c\u1ee9u c\u1ee7a \u0110\u1ee9c cho bi\u1ebft h\u1ecd \u0111ang c\u00f3 \u00fd \u0111\u1ecbnh ti\u1ebfp t\u1ee5c xem x\u00e9t 517 ng\u00f4i sao \u0111\u00f3 b\u1eb1ng thu\u1eadt to\u00e1n m\u1edbi \u0111\u1ec3 hy v\u1ecdng t\u00ecm th\u00eam c\u00e1c ngo\u1ea1i h\u00e0nh tinh (h\u00e0nh tinh ngo\u00e0i h\u1ec7 m\u1eb7t tr\u1eddi). H\u1ecd \u01b0\u1edbc t\u00ednh c\u00f3 th\u1ec3 t\u00ecm th\u00eam \u00edt nh\u1ea5t 100 h\u00e0nh tinh c\u00f3 k\u00edch th\u01b0\u1edbc tr\u00e1i \u0111\u1ea5t b\u1eb1ng thu\u1eadt to\u00e1n c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n

Nghi\u00ean c\u1ee9u v\u1eeba c\u00f4ng b\u1ed1 trong 2 b\u00e0i b\u00e1o \u0111\u0103ng t\u1ea3i tr\u00ean t\u1ea1p ch\u00ed khoa h\u1ecdc Astronomy and Astrophysics.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

R\u00e0 so\u00e1t di s\u1ea3n t\u1eeb th\u1ee3 s\u0103n h\u00e0nh tinh Kepler \u0111\u00e3 ch\u1ebft c\u1ee7a NASA b\u1eb1ng thu\u1eadt to\u00e1n m\u1edbi, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 t\u00ecm th\u1ea5y c\u00f9ng l\u00fac 18 h\u00e0nh tinh c\u1ee1 tr\u00e1i \u0111\u1ea5t b\u1ecb ch\u00f4n v\u00f9i. Nghi\u00ean c\u1ee9u m\u1edbi ph\u1ed1i h\u1ee3p gi\u1eefa Vi\u1ec7n Nghi\u00ean c\u1ee9u H\u1ec7 m\u1eb7t tr\u1eddi Max Planck, \u0110\u00e0i thi\u00ean v\u0103n Sonneberg, Vi\u1ec7n […]<\/p>\n","protected":false},"author":25,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28405","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28405","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28405"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28405\/revisions"}],"predecessor-version":[{"id":28406,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28405\/revisions\/28406"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}