T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum<\/p>\n\n\n\n
Hai ng\u01b0\u1eddi – m\u1ed9t ng\u01b0\u1eddi t\u00ean l\u00e0 titius, m\u1ed9t t\u00ean l\u00e0 Bode – s\u1ed1ng \u1edf hai th\u1eddi \u0111\u1ea1i kh\u00e1c nhau nh\u01b0ng c\u00f9ng chung m\u1ed9t nh\u1eadn \u0111\u1ecbnh: \u1edf kho\u1ea3ng c\u00e1ch gi\u1eefa sao H\u1ecfa v\u00e0 sao m\u1ed9c c\u00f3 l\u1ebd – hay l\u00e0 ph\u1ea3i c\u00f3 – \u00edt nh\u1ea5t l\u00e0 m\u1ed9t h\u00e0nh tinh n\u1eefa, b\u1edfi v\u00ec c\u00f3 m\u1ed9t kho\u1ea3ng tr\u1ed1ng l\u1edbn nh\u01b0 v\u1eady trong kho\u1ea3ng c\u00e1ch \u1ea5y. Nhi\u1ec1u nh\u00e0 thi\u00ean v\u0103n \u0111\u00e3 ch\u0103m ch\u00fa t\u00ecm h\u00e0nh tinh \u201cd\u1ef1 \u0111o\u00e1n\u201d \u1ea5y.<\/p>\n\n\n\n
V\u00e0o n\u0103m 1801, ng\u01b0\u1eddi ta \u0111\u00e3 t\u00ecm – \u0111\u00e3 ph\u00e1t hi\u1ec7n ra – h\u00e0nh tinh \u1ea5y. N\u00f3 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean l\u00e0 Ceres, nh\u01b0ng l\u1ea1i ch\u1ec9 l\u00e0 m\u1ed9t h\u00e0nh tinh nh\u1ecf x\u00edu v\u1edbi \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 768km. Do \u0111\u00f3 ng\u01b0\u1eddi ta cho r\u1eb1ng Ceres ch\u1ec9 l\u00e0 m\u1ed9t trong s\u1ed1 nh\u1eefng h\u00e0nh tinh nh\u1ecf kh\u00e1c. V\u00e0 c\u00e1c nh\u00e0 khoa h\u1ecdc l\u1ea1i ti\u1ebfp t\u1ee5c d\u00f2 t\u00ecm. Nay th\u00ec ng\u01b0\u1eddi ta \u0111\u00e3 ph\u00e1t hi\u1ec7n th\u00eam \u0111\u01b0\u1ee3c ba h\u00e0nh tinh nh\u1ecf kh\u00e1c n\u1eefa trong \u0111\u00f3 h\u00e0nh tinh s\u00e1ng nh\u1ea5t c\u0169ng ch\u1ec9 b\u1eb1ng n\u1eefa k\u00edch c\u1ee1 c\u1ee7a Ceres. C\u00e1c nh\u00e0 thi\u00ean v\u0103n qu\u1ea3 quy\u1ebft l\u00e0 m\u1ed9t h\u00e0nh tinh l\u1edbn h\u01a1n \u0111\u00e3 b\u1ecb n\u1ed5 tung v\u00e0 \u0111\u1ec3 l\u1ea1i b\u1ed1n h\u00e0nh tinh nh\u1ecf kia. Nh\u01b0ng sau 15 n\u0103m \u201cs\u0103n l\u00f9ng\u201d, h\u1ecd c\u0169ng ch\u1ec9 ph\u00e1t hi\u1ec7n th\u00eam nh\u1eefng h\u00e0nh tinh nh\u1ecf kh\u00e1c n\u1eefa. tuy nhi\u00ean, cu\u1ed9c \u201cs\u0103n l\u00f9ng\u201d v\u1eabn c\u1ee9 ti\u1ebfp t\u1ee5c. Cho \u0111\u1ebfn n\u0103m 1890, ng\u01b0\u1eddi ta \u0111\u00e3 ph\u00e1t hi\u1ec7n ra 300 h\u00e0nh tinh t\u00ed hon. V\u00e0 t\u1eeb n\u0103m 1890 \u0111\u1ebfn n\u0103m 1927, ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c 2000 h\u00e0nh tinh t\u00ed hon n\u1eefa. t\u1ea5t c\u1ea3 h\u00e0nh tinh t\u00ed hon n\u00e0y \u0111\u1ec1u n\u1eb1m \u1edf kho\u1ea3ng gi\u1eefa sao H\u1ecfa v\u00e0 sao m\u1ed9c v\u00e0 c\u00f9ng xoay quanh m\u1eb7t tr\u1eddi. C\u00e1c h\u00e0nh tinh t\u00ed hon n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t cho c\u00e1i t\u00ean chung l\u00e0 c\u00e1c \u201cthi\u00ean th\u1ec3\u201d (asteroids). \u0111\u1ec3 c\u00e1c b\u1ea1n c\u00f3 kh\u00e1i ni\u1ec7m v\u1ec1 k\u00edch c\u1ee1 c\u1ee7a c\u00e1c thi\u00ean th\u1ec3 – c\u00e1c h\u00e0nh tinh t\u00ed hon – n\u00e0y, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 cung c\u1ea5p s\u1ed1 li\u1ec7u nh\u01b0 sau: trong s\u1ed1 m\u1ea5y ng\u00e0n thi\u00ean th\u1ec3 \u1ea5y, 195 thi\u00ean th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 97,6km; 502 thi\u00ean th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 40km \u0111\u1ebfn 97,6km; 193 thi\u00ean th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 16km \u0111\u1ebfn 40km; 22 thi\u00ean th\u1ec3 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n 16km. C\u00f2n l\u1ea1i l\u00e0 \u0111\u00e1m \u201cl\u00f4m c\u00f4m\u201d.<\/p>\n\n\n\n
N\u1ebfu gom kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c thi\u00ean th\u1ec3 n\u00e0y l\u1ea1i th\u00e0nh m\u1ed9t th\u00f4i th\u00ec ta c\u0169ng ch\u1ec9 c\u00f3 m\u1ed9t thi\u00ean th\u1ec3 ch\u1ec9 b\u1eb1ng 1\/3000 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a \u0111\u1ecba c\u1ea7u, ngh\u0129a l\u00e0 m\u1ed9t h\u00e0nh tinh \u201ckh\u00f4ng nh\u1eb1m nh\u00f2 g\u00ec\u201d.<\/p>\n\n\n\n
Nh\u01b0ng c\u00e2u h\u1ecfi: \u201cC\u00e1c thi\u00ean th\u1ec3 \u1ea5y h\u00ecnh th\u00e0nh nh\u01b0 th\u1ebf n\u00e0o?\u201d kh\u00f4ng ph\u1ea3i l\u00e0 d\u1ec5 tr\u1ea3 l\u1eddi. C\u00f3 gi\u1ea3 thuy\u1ebft cho r\u1eb1ng m\u1ed9t h\u1ed9 tinh c\u1ee7a sao m\u1ed9c b\u1ecb n\u1ed5 v\u00e0 t\u1ea1o th\u00e0nh c\u00e1c thi\u00ean th\u1ec3 \u1ea5y.<\/p>\n\n\n\n
Nh\u00ecn b\u1ea7u tr\u1eddi, ta th\u1ea5y c\u00e1c tinh t\u00fa t\u00fam t\u1ee5m chi ch\u00edt v\u1edbi nhau, ta c\u00f3 th\u1ec3 t\u1ef1 h\u1ecfi kh\u00f4ng hi\u1ec3u c\u00f3 l\u00fac n\u00e0o \u0111\u00f3 c\u00e1c tinh t\u00fa \u1ea5y \u201c\u0111\u1ee5ng\u201d ph\u1ea3i nhau kh\u00f4ng. may thay, cho \u0111\u1ebfn nay th\u00ec s\u1ef1 ki\u1ec7n \u1ea5y ch\u01b0a x\u1ea3y ra.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum Hai ng\u01b0\u1eddi – m\u1ed9t ng\u01b0\u1eddi t\u00ean l\u00e0 titius, m\u1ed9t t\u00ean l\u00e0 Bode – s\u1ed1ng \u1edf hai th\u1eddi \u0111\u1ea1i kh\u00e1c nhau nh\u01b0ng c\u00f9ng chung m\u1ed9t nh\u1eadn \u0111\u1ecbnh: \u1edf kho\u1ea3ng c\u00e1ch gi\u1eefa sao H\u1ecfa v\u00e0 sao m\u1ed9c c\u00f3 l\u1ebd – hay […]<\/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":[15],"tags":[],"class_list":["post-13712","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13712","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=13712"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13712\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}