T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 – Arkady Leokum<\/p>\n\n\n\n
Tr\u00ed kh\u00f4n c\u1ee7a lo\u00e0i ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 h\u00ecnh dung \u0111\u00fang \u0111\u01b0\u1ee3c t\u1ea7m v\u00f3c c\u1ee7a v\u0169 tr\u1ee5. Ch\u1eb3ng nh\u1eefng kh\u00f4ng th\u1ec3 bi\u1ebft m\u00e0 ngay c\u1ea3 h\u00ecnh dung ra n\u00f3 l\u1edbn b\u1eb1ng n\u00e0o c\u0169ng \u0111\u00e3 l\u00e0 kh\u00f3 r\u1ed3i.<\/p>\n\n\n\n
Xu\u1ea5t ph\u00e1t t\u1eeb tr\u00e1i \u0111\u1ea5t, ta s\u1ebd th\u1ea5y t\u1ea1i sao l\u1ea1i nh\u01b0 v\u1eady. Tr\u00e1i \u0111\u1ea5t l\u00e0 m\u1ed9t ph\u1ea7n – v\u00e0 c\u0169ng ch\u1ec9 l\u00e0 ph\u1ea7n nh\u1ecf li ti m\u00e0 th\u00f4i – c\u1ee7a h\u1ec7 m\u1eb7t tr\u1eddi bao g\u1ed3m m\u1eb7t tr\u1eddi, c\u00e1c h\u00e0nh tinh xoay quanh n\u00f3, c\u00e1c ti\u1ec3u h\u00e0nh tinh v\u00e0 c\u00e1c thi\u00ean th\u1ec3 kh\u00e1c. To\u00e0n th\u1ec3 h\u1ec7 m\u1eb7t tr\u1eddi \u201cc\u1ee7a ch\u00fang ta\u201d c\u0169ng ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n – v\u00e0 c\u0169ng ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n nh\u1ecf t\u00ed ti m\u00e0 th\u00f4i – c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c l\u1edbn h\u01a1n g\u1ecdi l\u00e0 thi\u00ean h\u00e0 (hay d\u1ea3i ng\u00e2n h\u00e0). Thi\u00ean h\u00e0 l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng g\u1ed3m h\u00e0ng tri\u1ec7u c\u00e1c v\u00ec sao, trong \u0111\u00f3 c\u00f3 nhi\u1ec1u v\u00ec sao l\u1edbn h\u01a1n m\u1eb7t tr\u1eddi \u201cc\u1ee7a ch\u00fang ta\u201d b\u1ed9i ph\u1ea7n. V\u00e0 c\u00e1c v\u00ec sao n\u00e0y c\u0169ng c\u00f3 h\u1ec7 m\u1eb7t tr\u1eddi ri\u00eang c\u1ee7a n\u00f3.<\/p>\n\n\n\n
C\u00e1c v\u00ec sao m\u00e0 ta th\u1ea5y trong thi\u00ean h\u00e0 \u201cc\u1ee7a ch\u00fang ta\u201d c\u0169ng \u0111\u1ec1u l\u00e0 nh\u1eefng m\u1eb7t tr\u1eddi c\u1ea3. Ch\u00fang \u1edf c\u00e1ch xa ch\u00fang ta \u0111\u1ebfn n\u1ed7i kh\u00f4ng th\u1ec3 d\u00f9ng \u0111\u01a1n v\u1ecb \u0111o chi\u1ec1u d\u00e0i th\u00f4ng th\u01b0\u1eddng nh\u01b0 d\u1eb7m (mile) hay kilomet (km) m\u00e0 ph\u1ea3i d\u00f9ng \u0111\u01a1n v\u1ecb \u201cn\u0103m \u00e1nh s\u00e1ng\u201d. \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c m\u1ed9t n\u0103m \u00e1nh s\u00e1ng d\u00e0i bao nhi\u00eau km, b\u1ea1n h\u00e3y c\u1ee9 l\u1ea5y 300.000 km nh\u00e2n v\u1edbi s\u1ed1 gi\u00e2y trong m\u1ed9t n\u0103m. N\u1ebfu b\u1ea1n th\u00edch th\u00edch th\u00ec con s\u1ed1 \u1ea5y \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng to\u00e1n h\u1ecdc nh\u01b0 th\u1ebf n\u00e0y: 9.461×1012 km. B\u1ea1n t\u00ednh ra \u0111i. Ng\u00f4i sao g\u1ea7n tr\u00e1i \u0111\u1ea5t nh\u1ea5t t\u00ean l\u00e0 Alpha centauri – xin nh\u1eafc l\u1ea1i, g\u1ea7n tr\u00e1i \u0111\u1ea5t nh\u1ea5t – c\u0169ng \u1edf c\u00e1ch ta 4,3 n\u0103m \u00e1nh s\u00e1ng.<\/p>\n\n\n\n
Thi\u00ean h\u00e0 \u201cc\u1ee7a ch\u00fang ta\u201d c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc b\u1eb1ng n\u00e0o? N\u00f3 c\u00f3 h\u00ecnh c\u00e1i d\u0129a, h\u01a1i ph\u00ecnh \u1edf trung t\u00e2m, c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 100.000 n\u0103m \u00e1nh s\u00e1ng v\u00e0 b\u1ec1 d\u00e0y \u1edf trung t\u00e2m kho\u1ea3ng 20.000 n\u0103m \u00e1nh s\u00e1ng. Tuy nhi\u00ean d\u1ea3i thi\u00ean h\u00e0 \u201cc\u1ee7a ch\u00fang ta\u201d c\u0169ng l\u1ea1i ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n t\u00ed ti c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00e1c l\u1edbn h\u01a1n. Ngo\u00e0i h\u1ec7 th\u1ed1ng thi\u00ean h\u00e0 \u201cc\u1ee7a ch\u00fang ta\u201d c\u00f2n tri\u1ec7u tri\u1ec7u h\u1ec7 th\u1ed1ng thi\u00ean h\u00e0 kh\u00e1c n\u1eefa\u2026<\/p>\n\n\n\n
B\u1edfi v\u1eady ta m\u1edbi hi\u1ec3u t\u1ea1i sao ta kh\u00f4ng th\u1ec3 n\u00e0o h\u00ecnh dung \u0111\u01b0\u1ee3c t\u1ea7m c\u1ee1 c\u1ee7a v\u0169 tr\u1ee5. \u0111\u00e3 th\u1ebf, c\u00e1c nh\u00e0 khoa h\u1ecdc c\u00f2n cho r\u1eb1ng v\u0169 tr\u1ee5 \u0111ang \u201cn\u1edf\u201d r\u1ed9ng. C\u00f3 ngh\u0129a l\u00e0 ch\u1ec9 trong v\u00e0i t\u1ef7 n\u0103m th\u00ec hai thi\u00ean h\u00e0 c\u00f3 th\u1ec3 dang xa nhau ra m\u1ed9t kho\u1ea3ng c\u00e1ch g\u1ea5p hai l\u1ea7n kho\u1ea3ng c\u00e1ch tr\u01b0\u1edbc \u0111\u00f3.<\/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 1 – Arkady Leokum Tr\u00ed kh\u00f4n c\u1ee7a lo\u00e0i ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 h\u00ecnh dung \u0111\u00fang \u0111\u01b0\u1ee3c t\u1ea7m v\u00f3c c\u1ee7a v\u0169 tr\u1ee5. Ch\u1eb3ng nh\u1eefng kh\u00f4ng th\u1ec3 bi\u1ebft m\u00e0 ngay c\u1ea3 h\u00ecnh dung ra n\u00f3 l\u1edbn b\u1eb1ng n\u00e0o c\u0169ng \u0111\u00e3 l\u00e0 kh\u00f3 r\u1ed3i. Xu\u1ea5t ph\u00e1t t\u1eeb […]<\/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-13472","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\/13472","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=13472"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13472\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}