Khi nghi\u00ean c\u1ee9u qu\u1ef9 \u0111\u1ea1o c\u1ee7a c\u00e1c h\u00e0nh tinh trong h\u1ec7 M\u1eb7t Tr\u1eddi, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n m\u1ed9t s\u1ef1 ki\u1ec7n r\u1ea5t th\u00fa v\u1ecb. H\u1ecd ph\u00e1t hi\u1ec7n c\u00e1c h\u00e0nh tinh kh\u00f4ng ph\u1ea3i ph\u00e2n b\u1ed1 tu\u1ef3 ti\u1ec7n trong v\u0169 tr\u1ee5 m\u00e0 \u0111\u00f3 l\u00e0 m\u1ed9t s\u1ef1 ph\u00e2n b\u1ed1 v\u00e0 chuy\u1ec3n \u0111\u1ed9ng c\u00f3 quy lu\u1eadt quanh M\u1eb7t Tr\u1eddi theo tr\u00f2 ch\u01a1i to\u00e1n h\u1ecdc sau:<\/p>\n\n\n\n
V\u00ed d\u1ee5: 3 | 6 | 12 | 24 | 48 | 96 | \u2026<\/p>\n\n\n\n
Trong \u0111\u00f3 s\u1ed1 sau v\u1eeba \u0111\u00fang g\u1ea5p \u0111\u00f4i s\u1ed1 tr\u01b0\u1edbc. N\u1ebfu trong d\u00e3y s\u1ed1 n\u00e0y tr\u01b0\u1edbc d\u00e3y s\u1ed1 th\u00eam v\u00e0o s\u1ed1 0, sau \u0111\u00f3 l\u1ea1i c\u1ed9ng th\u00eam 4 v\u00e0o cho m\u1ed7i s\u1ed1 th\u00ec s\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t d\u00e3y s\u1ed1 kh\u00e1c: 4 | 7 | 10 | 16 | 18 | 52 | 100 | \u2026<\/p>\n\n\n\n
L\u1ea1i \u0111em d\u00e3y s\u1ed1 n\u00e0y chia cho 10 th\u00ec s\u1ebd \u0111\u01b0\u1ee3c s\u1ed1 \u0111\u01a1n v\u1ecb thi\u00ean v\u0103n bi\u1ec3u th\u1ecb kho\u1ea3ng c\u00e1ch b\u00ecnh qu\u00e2n c\u1ee7a c\u00e1c h\u00e0nh tinh \u0111\u1ebfn M\u1eb7t Tr\u1eddi:<\/p>\n\n\n\n
\u0110\u00f3 l\u00e0 Bode nh\u00e0 thi\u00ean v\u0103n \u0110\u1ee9c khi nghi\u00ean c\u1ee9u s\u1ef1 ph\u00e1t hi\u1ec7n c\u1ee7a Titius \u0111\u00e3 r\u00fat ra quy t\u1eafc n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 quy t\u1eafc “Titius – Bode”.<\/p>\n\n\n\n
C\u0103n c\u1ee9 quy t\u1eafc n\u00e0y th\u00ec gi\u1eefa qu\u1ef9 \u0111\u1ea1o M\u1ed9c Tinh v\u00e0 Ho\u1ea3 Tinh n\u00ean c\u00f3 m\u1ed9t h\u00e0nh tinh n\u1eefa. V\u1eady n\u00f3 “tr\u1ed1n” \u1edf \u0111\u00e2u? Nhi\u1ec1u nh\u00e0 thi\u00ean v\u0103n \u0111\u1ec1u h\u01b0\u1edbng k\u00ednh vi\u1ec5n v\u1ecdng v\u00e0o b\u1ea7u tr\u1eddi \u0111\u1ec3 t\u00ecm ki\u1ebfm h\u00e0nh tinh \u0111\u00f3.<\/p>\n\n\n\n
\u0110\u00eam ng\u00e0y 1 th\u00e1ng 1 n\u0103m 1801, cu\u1ed1i c\u00f9ng h\u00e0nh tinh “tr\u1ed1n” n\u00e0y c\u0169ng \u0111\u00e3 b\u1ecb nh\u00e0 thi\u00ean v\u0103n \u00fd l\u00e0 Piazzi “t\u00f3m” \u0111\u01b0\u1ee3c. Ng\u01b0\u1eddi ta \u0111\u00e3 \u0111\u1eb7t t\u00ean cho h\u00e0nh tinh n\u00e0y l\u00e0 sao C\u1ed1c Th\u1ea7n (Ceres).<\/p>\n\n\n\n
H\u00e0nh tinh m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong k\u1ef3 v\u1ecdng l\u00e0m cho c\u00e1c nh\u00e0 thi\u00ean v\u0103n v\u1eeba ph\u1ea5n kh\u1edfi l\u1ea1i v\u1eeba c\u1ea3m th\u1ea5y th\u1ea5t v\u1ecdng. B\u1edfi v\u00ec h\u00e0nh tinh n\u00e0y nh\u1ecf \u0111\u1ebfn k\u1ef3 l\u1ea1, \u0111\u01b0\u1eddng k\u00ednh ch\u1ec9 c\u00f3 770 km ch\u01b0a \u0111\u1ebfn 1\/4 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a M\u1eb7t Tr\u0103ng. N\u00f3 ch\u1ec9 \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t h\u00e0nh tinh r\u1ea5t nh\u1ecf – ti\u1ec3u h\u00e0nh tinh.<\/p>\n\n\n\n
Kho\u1ea3ng 1 n\u0103m tr\u00f4i qua, n\u0103m 1802 b\u00e1c s\u0129 Aupos nh\u00e0 thi\u00ean v\u0103n nghi\u1ec7p d\u01b0 ng\u01b0\u1eddi \u0110\u1ee9c l\u1ea1i ph\u00e1t hi\u1ec7n ti\u1ec3u h\u00e0nh tinh th\u1ee9 2 – sao Tr\u00ed Th\u1ea7n (Pallas). Sao n\u00e0y c\u00f2n nh\u1ecf h\u01a1n c\u1ea3 C\u1ed1c Th\u1ea7n, \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a n\u00f3 ch\u01b0a \u0111\u1ebfn 500 km.<\/p>\n\n\n\n
S\u1ef1 ph\u00e1t hi\u1ec7n sao Tr\u00ed Th\u1ea7n khi\u1ebfn cho c\u00e1c nh\u00e0 thi\u00ean v\u0103n c\u1ea3m th\u1ea5y r\u1ea5t kinh ng\u1ea1c, v\u00ec ban \u0111\u1ea7u h\u1ecd mu\u1ed1n t\u00ecm th\u1ea5y m\u1ed9t h\u00e0nh tinh, nh\u01b0ng nay l\u1ea1i t\u00ecm th\u1ea5y m\u1ed9t c\u1eb7p. Nh\u01b0 v\u1eady c\u00f2n c\u00f3 ng\u00f4i sao th\u1ee9 3, th\u1ee9 4 n\u1eefa kh\u00f4ng?<\/p>\n\n\n\n
S\u1ef1 th\u1ef1c \u0111\u00fang nh\u01b0 m\u1ecdi ng\u01b0\u1eddi d\u1ef1 \u0111o\u00e1n, n\u0103m 1804 t\u1ee9c l\u00e0 2 n\u0103m sau ng\u01b0\u1eddi ta l\u1ea1i ph\u00e1t hi\u1ec7n ti\u1ec3u h\u00e0nh tinh th\u1ee9 3 – sao H\u00f4n th\u1ea7n (Juno). N\u0103m 1807 l\u1ea1i ph\u00e1t hi\u1ec7n ti\u1ec3u h\u00e0nh tinh th\u1ee9 4 – sao T\u00e1o Th\u1ea7n (Vesta). V\u1ec1 sau l\u1ea1i ph\u00e1t hi\u1ec7n ti\u1ec3u h\u00e0nh tinh th\u1ee9 5, th\u1ee9 6\u2026 Su\u1ed1t th\u1ec3 k\u1ef7 XIX c\u00e1c nh\u00e0 thi\u00ean v\u0103n \u0111\u00e3 ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c h\u01a1n 400 ti\u1ec3u h\u00e0nh tinh. \u0110\u1ebfn th\u1ebf k\u1ef7 XX s\u1ed1 ti\u1ec3u h\u00e0nh tinh ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c ng\u00e0y c\u00e0ng nhi\u1ec1u. \u0110\u1ec3 ti\u1ec7n cho quan s\u00e1t v\u00e0 nghi\u00ean c\u1ee9u, ng\u01b0\u1eddi ta \u0111\u00e3 \u0111\u00e1nh s\u1ed1 cho c\u00e1c ti\u1ec3u h\u00e0nh tinh. Cho \u0111\u1ebfn nay s\u1ed1 ti\u1ec3u h\u00e0nh tinh \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 h\u01a1n 8000 ng\u00f4i. Nh\u01b0ng \u0111i\u1ec1u n\u00ean n\u00f3i l\u00e0 nh\u1eefng ti\u1ec3u h\u00e0nh tinh \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ch\u1ec9 l\u00e0 s\u1ed1 \u00edt trong s\u1ed1 ti\u1ec3u h\u00e0nh tinh v\u1ed1n c\u00f3. C\u00e1c nh\u00e0 khoa h\u1ecdc t\u00ednh to\u00e1n r\u1eb1ng: t\u1ed5ng s\u1ed1 ti\u1ec3u h\u00e0nh tinh c\u00f3 kho\u1ea3ng 50 v\u1ea1n ng\u00f4i.<\/p>\n\n\n\n
Ngo\u00e0i c\u00e1c ng\u00f4i ti\u1ec3u h\u00e0nh tinh ph\u00e1t hi\u1ec7n ban \u0111\u1ea7u ra, s\u1ed1 c\u00f2n l\u1ea1i \u0111\u1ec1u r\u1ea5t nh\u1ecf. \u0110\u01b0\u1eddng k\u00ednh c\u1ee7a n\u00f3 ph\u1ea7n l\u1edbn ch\u1ec9 m\u1ea5y tr\u0103m m\u00e9t \u0111\u1ebfn \u0111\u1ebfn m\u1ea5y ch\u1ee5c km. \u0110\u1ed9 s\u00e1ng r\u1ea5t y\u1ebfu. Trong s\u1ed1 nh\u1eefng ti\u1ec3u h\u00e0nh tinh n\u00e0y ch\u1ec9 c\u00f3 ng\u00f4i s\u1ed1 4 l\u00e0 T\u00e1o th\u1ea7n c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c b\u1eb1ng m\u1eaft th\u01b0\u1eddng. C\u00f3 ng\u01b0\u1eddi \u0111\u00e3 t\u00ednh to\u00e1n t\u1ed5ng kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a to\u00e0n b\u1ed9 c\u00e1c ti\u1ec3u h\u00e0nh tinh ch\u1ec9 b\u1eb1ng b\u1ed1n ph\u1ea7n v\u1ea1n c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng Tr\u00e1i \u0110\u1ea5t.<\/p>\n\n\n\n
Nh\u01b0 ta \u0111\u00e3 bi\u1ebft, h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c \u0111\u1ea1i h\u00e0nh tinh \u0111\u1ec1u g\u1ea7n v\u1edbi h\u00ecnh c\u1ea7u, nh\u01b0ng h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c ti\u1ec3u h\u00e0nh tinh r\u1ea5t kh\u00f4ng quy t\u1eafc. C\u00f3 nh\u1eefng h\u00e0nh tinh r\u1ea5t nh\u1ecf, h\u00ecnh d\u1ea1ng b\u1ea5t k\u1ef3. Gi\u1ed1ng nh\u01b0 9 h\u00e0nh tinh l\u1edbn, ch\u00fang lu\u00f4n lu\u00f4n quay quanh M\u1eb7t Tr\u1eddi.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Ti\u1ec3u h\u00e0nh tinh; Quy t\u1eafc Titius –<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Khi nghi\u00ean c\u1ee9u qu\u1ef9 \u0111\u1ea1o c\u1ee7a c\u00e1c h\u00e0nh tinh trong h\u1ec7 M\u1eb7t Tr\u1eddi, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n m\u1ed9t s\u1ef1 ki\u1ec7n r\u1ea5t th\u00fa v\u1ecb. H\u1ecd ph\u00e1t hi\u1ec7n c\u00e1c h\u00e0nh tinh kh\u00f4ng ph\u1ea3i ph\u00e2n b\u1ed1 tu\u1ef3 ti\u1ec7n trong v\u0169 tr\u1ee5 m\u00e0 \u0111\u00f3 l\u00e0 m\u1ed9t s\u1ef1 ph\u00e2n b\u1ed1 v\u00e0 chuy\u1ec3n \u0111\u1ed9ng c\u00f3 quy lu\u1eadt quanh […]<\/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":[15,7],"tags":[],"class_list":["post-7183","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7183","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=7183"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7183\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}