V\u0169 tr\u1ee5 bao la, ch\u1ee9a \u0111\u1ee7 m\u1ecdi v\u1eadt, v\u00f4 c\u00f9ng v\u00f4 t\u1eadn. Nh\u01b0ng l\u00fd thuy\u1ebft v\u0169 tr\u1ee5 hi\u1ec7n \u0111\u1ea1i l\u1ea1i n\u00f3i r\u1eb1ng: v\u0169 tr\u1ee5 c\u00f3 h\u1ea1n m\u00e0 v\u00f4 bi\u00ean, nh\u01b0 th\u1ebf ngh\u0129a l\u00e0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n
D\u00f9ng k\u00edch th\u01b0\u1edbc trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y m\u00e0 x\u00e9t th\u00ec Tr\u00e1i \u0110\u1ea5t \u0111\u00e3 v\u00f4 c\u00f9ng to l\u1edbn, b\u00e1n k\u00ednh b\u00ecnh qu\u00e2n c\u1ee7a n\u00f3 kho\u1ea3ng 6371 km. \u0110i m\u00e1y bay v\u00f2ng quanh Tr\u00e1i \u0110\u1ea5t m\u1ed9t v\u00f2ng ph\u1ea3i m\u1ea5t m\u1ea5y ch\u1ee5c gi\u1edd. M\u1eb7t<\/p>\n\n\n\n
Tr\u1eddi c\u00e0ng to h\u01a1n nhi\u1ec1u.<\/p>\n\n\n\n
N\u00f3 c\u00f3 th\u1ec3 ch\u1ee9a 130 v\u1ea1n Tr\u00e1i \u0110\u1ea5t. Nh\u01b0ng M\u1eb7t Tr\u1eddi c\u0169ng ch\u1ec9 l\u00e0 m\u1ed9t th\u00e0nh vi\u00ean th\u00f4ng th\u01b0\u1eddng trong \u0111\u1ea1i gia \u0111\u00ecnh h\u1ec7 Ng\u00e2n h\u00e0. Trong h\u1ec7 Ng\u00e2n h\u00e0 c\u00f3 h\u00e0ng tr\u0103m t\u1ec9 h\u1eb1ng tinh to nh\u01b0 M\u1eb7t Tr\u1eddi. Ch\u1ea1y nhanh nh\u01b0 \u00e1nh s\u00e1ng mu\u1ed1n v\u01b0\u1ee3t qua h\u1ec7 Ng\u00e2n h\u00e0 t\u1ed1i thi\u1ec3u c\u0169ng m\u1ea5t 10 v\u1ea1n n\u0103m. Ngo\u00e0i tr\u1eddi c\u00f2n c\u00f3 tr\u1eddi, ngo\u00e0i h\u1ec7 Ng\u00e2n h\u00e0 c\u00f2n c\u00f3 tinh h\u1ec7 – m\u1ed9t thi\u00ean th\u1ec3 trong \u0111\u1ea1i gia \u0111\u00ecnh kh\u1ed5ng l\u1ed3 gi\u1ed1ng nh\u01b0 h\u1ec7 Ng\u00e2n h\u00e0 kh\u00f4ng \u0111\u1ebfm xu\u1ec3. Nh\u1edd v\u00e0o k\u00ednh vi\u1ec5n v\u1ecdng thi\u00ean v\u0103n ng\u00e0y c\u00e0ng l\u1edbn, ta c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y ng\u00e0y c\u00e0ng nhi\u1ec1u v\u00e0 c\u00e0ng xa h\u01a1n c\u00e1c thi\u00ean th\u1ec3. Hi\u1ec7n nay ng\u01b0\u1eddi ta \u0111\u00e3 nh\u00ecn th\u1ea5y c\u00e1c thi\u00ean th\u1ec3 c\u00e1ch xa ta 10 t\u1ec9 n\u0103m \u00e1nh s\u00e1ng, t\u1ee9c l\u00e0 n\u00f3i v\u0169 tr\u1ee5 hi\u1ec7n nay m\u00e0 ta quan s\u00e1t \u0111\u01b0\u1ee3c t\u1ed1i thi\u1ec3u v\u01b0\u1ee3t qu\u00e1 10 t\u1ec9 n\u0103m \u00e1nh s\u00e1ng. Nh\u01b0ng v\u0169 tr\u1ee5 m\u00e0 ta quan s\u00e1t \u0111\u01b0\u1ee3c m\u1edbi ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a v\u0169 tr\u1ee5. V\u00ec b\u1ecb n\u0103ng l\u1ef1c c\u1ee7a k\u00ednh vi\u1ec5n v\u1ecdng h\u1ea1n ch\u1ebf n\u00ean ta kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y to\u00e0n b\u1ed9 b\u1ed9 m\u1eb7t c\u1ee7a v\u0169 tr\u1ee5, cho n\u00ean r\u1ea5t kh\u00f3 x\u00e1c \u0111\u1ecbnh v\u0169 tr\u1ee5 to bao nhi\u00eau.<\/p>\n\n\n\n
Do \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y v\u0169 tr\u1ee5 c\u1ee7a ta th\u1ef1c t\u1ebf \u0111\u00e3 \u0111\u1ee7 l\u1edbn, v\u01b0\u1ee3t xa s\u1ef1 t\u01b0\u1edfng t\u01b0\u1ee3ng c\u1ee7a ta. Nh\u01b0ng n\u1ebfu ta \u0111\u1ecbnh ngh\u0129a v\u0169 tr\u1ee5 th\u00e0nh s\u1ef1 t\u1ed5ng ho\u00e0 c\u1ee7a th\u1eddi gian v\u00e0 kh\u00f4ng gian c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c v\u1ec1 m\u1eb7t v\u1eadt l\u00fd th\u00ec kh\u00f4ng ph\u1ea3i l\u00e0 l\u1edbn v\u00f4 h\u1ea1n. S\u1ef1 quan tr\u1eafc c\u1ee7a thi\u00ean v\u0103n ch\u1ee9ng t\u1ecf h\u1ec7 sao v\u00e0 gi\u1eefa c\u00e1c h\u1ec7 sao c\u00e1ch nhau r\u1ea5t xa, h\u01a1n n\u1eefa kho\u1ea3ng c\u00e1ch c\u00e0ng xa th\u00ec t\u1ed1c ch\u1ea1y xa nhau c\u00e0ng l\u1edbn. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y gi\u1ed1ng nh\u01b0 ta th\u1ed5i m\u1ed9t qu\u1ea3 kh\u00ed c\u1ea7u tr\u00ean b\u1ec1 m\u1eb7t c\u00f3 nhi\u1ec1u \u0111\u1ed1m hoa. Qu\u1ea3 kh\u00ed c\u1ea7u c\u00e0ng th\u1ed5i l\u1edbn th\u00ec nh\u1eefng hoa tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a n\u00f3 s\u1ebd c\u00e0ng c\u00e1ch xa. Nghi\u00ean c\u1ee9u thi\u00ean v\u0103n h\u1ecdc hi\u1ec7n \u0111\u1ea1i ch\u1ec9 r\u00f5: v\u0169 tr\u1ee5 c\u1ee7a ta gi\u1ed1ng nh\u01b0 m\u1ed9t qu\u1ea3 kh\u00ed c\u1ea7u \u0111ang gi\u00e3n n\u1edf. N\u1ebfu th\u1ebf th\u00ec chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i v\u1edbi s\u1ef1 gi\u00e3n n\u1edf, t\u1ee9c l\u00e0 v\u00e0o qu\u00e1 kh\u1ee9 xa x\u01b0a (t\u1ed1i thi\u1ec3u tr\u00ean 10 t\u1ec9 n\u0103m) th\u00ec v\u0169 tr\u1ee5 s\u1ebd co ng\u00f3t th\u00e0nh m\u1ed9t \u0111i\u1ec3m. Cho n\u00ean v\u0169 tr\u1ee5 r\u1ea5t c\u00f3 th\u1ec3 ra \u0111\u1eddi t\u1eeb m\u1ed9t v\u1ee5 n\u1ed5 l\u1edbn si\u00eau c\u1ea5p, t\u1eeb trong m\u1ed9t \u0111i\u1ec3m s\u1ea3n sinh ra.<\/p>\n\n\n\n
Tuy ta kh\u00f4ng th\u1ec3 bi\u1ebft ch\u00ednh x\u00e1c v\u0169 tr\u1ee5 ch\u1ee9a bao nhi\u00eau v\u1eadt ch\u1ea5t, nh\u01b0ng cho d\u00f9 v\u1ec1 th\u1eddi gian v\u00e0 kh\u00f4ng gian th\u00ec \u0111\u1ec1u c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh kh\u00f4ng ph\u1ea3i l\u00e0 v\u00f4 h\u1ea1n.<\/p>\n\n\n\n
Nh\u01b0ng m\u1ed9t v\u0169 tr\u1ee5 c\u00f3 h\u1ea1n nh\u01b0 th\u1ebf, ch\u00fang ta m\u00e3i m\u00e3i kh\u00f4ng bao gi\u1edd t\u00ecm \u0111\u01b0\u1ee3c \u0111\u1ea7u t\u1eadn c\u00f9ng c\u1ee7a n\u00f3 l\u00e0 \u1edf \u0111\u00e2u, cho n\u00ean n\u00f3i v\u0169 tr\u1ee5 kh\u00f4ng c\u00f3 bi\u00ean gi\u1edbi. Hi\u1ec3u nh\u01b0 th\u1ebf n\u00e0o v\u1ec1 hi\u1ec7n t\u01b0\u1ee3ng k\u1ef3 qu\u00e1i n\u00e0y? Ch\u00fang ta l\u1ea1i ph\u1ea3i m\u01b0\u1ee3n h\u00ecnh t\u01b0\u1ee3ng qu\u1ea3 c\u1ea7u gi\u00e3n n\u1edf. Gi\u1ea3 thi\u1ebft ta bi\u1ebfn th\u00e0nh m\u1ed9t con ki\u1ebfn b\u1eb9p hai chi\u1ec1u, kh\u00f4ng c\u00f3 \u0111\u1ed9 d\u00e0y, ch\u00fa \u00fd: trong m\u1eaft c\u1ee7a con v\u1eadt hai chi\u1ec1u th\u00ec ch\u1ec9 c\u00f3 tr\u01b0\u1edbc v\u00e0 sau, tr\u00e1i v\u00e0 ph\u1ea3i m\u00e0 kh\u00f4ng c\u00f3 tr\u00ean d\u01b0\u1edbi. V\u1eady th\u00ec cho d\u00f9 ta b\u00f2 nh\u01b0 th\u1ebf n\u00e0o tr\u00ean m\u1eb7t \u0111\u1ea5t \u0111\u1ec1u kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y \u0111i\u1ec3m t\u1eadn c\u00f9ng. \u0110\u1ed1i v\u1edbi m\u1ed9t con v\u1eadt d\u1eb9p nh\u01b0 th\u1ebf m\u00e0 n\u00f3i th\u00ec m\u1eb7t qu\u1ea3 c\u1ea7u l\u00e0 c\u00f3 h\u1ea1n m\u00e0 kh\u00f4ng c\u00f3 bi\u00ean gi\u1edbi. B\u00e2y gi\u1edd tr\u1edf v\u1ec1 th\u1ebf gi\u1edbi l\u1eadp th\u1ec3, v\u00ec t\u00e1c d\u1ee5ng s\u1ee9c h\u00fat c\u1ee7a v\u1eadt ch\u1ea5t trong v\u0169 tr\u1ee5 m\u00e0 thuy\u1ebft t\u01b0\u01a1ng \u0111\u1ed1i r\u1ed9ng c\u1ee7a Anhxtanh \u0111\u00e3 ch\u1ee9ng minh: th\u1ebf gi\u1edbi l\u1eadp th\u1ec3 ba chi\u1ec1u c\u1ee7a ta trong k\u00edch th\u01b0\u1edbc v\u0169 tr\u1ee5 c\u0169ng cong nh\u01b0 m\u1ed9t qu\u1ea3 c\u1ea7u kh\u00ed (r\u1ea5t kh\u00f3 t\u01b0\u1edfng t\u01b0\u1ee3ng, nh\u01b0ng s\u1ef1 th\u1ef1c l\u00e0 nh\u01b0 th\u1ebf). Ch\u00ednh v\u00ec th\u1eddi gian v\u00e0 kh\u00f4ng gian cong, n\u1ebfu ta c\u00f3 d\u1ecbp du h\u00e0nh trong v\u0169 tr\u1ee5 c\u0169ng s\u1ebd g\u1eb7p ph\u1ea3i hi\u1ec7n t\u01b0\u1ee3ng kh\u00f4ng c\u00f3 ch\u1ed7 t\u1eadn c\u00f9ng. \u0110\u00f3 ch\u00ednh l\u00e0 h\u00e0m ngh\u0129a c\u01a1 b\u1ea3n nh\u1ea5t “v\u0169 tr\u1ee5 v\u00f4 bi\u00ean”.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: V\u0169 tr\u1ee5; Tinh h\u1ec7.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
V\u0169 tr\u1ee5 bao la, ch\u1ee9a \u0111\u1ee7 m\u1ecdi v\u1eadt, v\u00f4 c\u00f9ng v\u00f4 t\u1eadn. Nh\u01b0ng l\u00fd thuy\u1ebft v\u0169 tr\u1ee5 hi\u1ec7n \u0111\u1ea1i l\u1ea1i n\u00f3i r\u1eb1ng: v\u0169 tr\u1ee5 c\u00f3 h\u1ea1n m\u00e0 v\u00f4 bi\u00ean, nh\u01b0 th\u1ebf ngh\u0129a l\u00e0 th\u1ebf n\u00e0o? D\u00f9ng k\u00edch th\u01b0\u1edbc trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y m\u00e0 x\u00e9t th\u00ec Tr\u00e1i \u0110\u1ea5t \u0111\u00e3 v\u00f4 c\u00f9ng to l\u1edbn, b\u00e1n k\u00ednh […]<\/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-7257","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\/7257","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=7257"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7257\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}