C\u00e1c sao tr\u00ean tr\u1eddi c\u00f3 ng\u00f4i s\u00e1ng, ng\u00f4i t\u1ed1i. Nh\u01b0 ta \u0111\u00e3 bi\u1ebft b\u00f3ng \u0111\u00e8n \u0111i\u1ec7n 600 W s\u00e1ng h\u01a1n b\u00f3ng \u0111\u00e8n 20 W, \u0111\u00f3 l\u00e0 v\u00ec s\u1ee9c ph\u00e1t ra \u00e1nh s\u00e1ng c\u1ee7a ch\u00fang kh\u00e1c nhau. V\u1eady c\u00f3 ph\u1ea3i c\u00e1c ng\u00f4i sao s\u00e1ng c\u00f3 n\u0103ng l\u1ef1c ph\u00e1t ra \u00e1nh s\u00e1ng m\u1ea1nh h\u01a1n c\u00e1c ng\u00f4i sao t\u1ed1i kh\u00f4ng? Th\u1ef1c t\u1ebf kh\u00f4ng ho\u00e0n to\u00e0n nh\u01b0 th\u1ebf. Quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 s\u00e1ng c\u1ee7a m\u1ed9t ng\u00f4i sao ngo\u00e0i n\u0103ng l\u1ef1c ph\u00e1t s\u00e1ng c\u1ee7a n\u00f3 ra c\u00f2n c\u00f3 m\u1ed9t nguy\u00ean nh\u00e2n kh\u00e1c \u0111\u00f3 l\u00e0 kho\u1ea3ng c\u00e1ch c\u1ee7a n\u00f3 \u0111\u1ebfn ta xa hay g\u1ea7n. N\u00f3i chung sao c\u00e1ch ta c\u00e0ng g\u1ea7n th\u00ec nh\u00ecn th\u1ea5y n\u00f3 c\u00e0ng s\u00e1ng.<\/p>\n\n\n\n
Tr\u00ean \u0111\u00e2y l\u00e0 n\u00f3i \u0111\u1ebfn \u0111\u1ed9 nh\u00ecn th\u1ea5y c\u1ee7a sao, t\u1ee9c l\u00e0 \u0111\u1ed9 s\u00e1ng. \u0110\u1ed9 nh\u00ecn th\u1ea5y c\u1ee7a sao d\u00f9ng c\u1ea5p sao \u0111\u1ec3 bi\u1ec3n th\u1ecb. Nh\u1eefng sao s\u00e1ng nh\u1ea5t m\u00e0 ta th\u1ea5y \u0111\u01b0\u1ee3c n\u00f3i chung \u0111\u1ec1u thu\u1ed9c c\u1ea5p 1, nh\u1eefng sao t\u1ed1i nh\u1ea5t d\u00f9ng m\u1eaft th\u01b0\u1eddng c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o c\u1ea5p 6. C\u00e1c sao tr\u00ean tr\u1eddi c\u00f3 th\u1ec3 l\u00e0 nh\u1eefng h\u1eb1ng tinh c\u00f3 s\u1ee9c ph\u00e1t s\u00e1ng r\u1ea5t m\u1ea1nh, nh\u01b0ng c\u0169ng c\u00f3 th\u1ec3 v\u00ec ch\u00fang qu\u00e1 g\u1ea7n ta n\u00ean m\u1edbi s\u00e1ng \u0111\u1ebfn th\u1ebf. Ng\u01b0\u1ee3c l\u1ea1i c\u00f3 nh\u1eefng ng\u00f4i sao tuy t\u1ed1i nh\u01b0ng kh\u00f4ng nh\u1ea5t \u0111\u1ecbnh l\u00e0 t\u1ed1i, m\u1eb7c d\u00f9 ph\u1ea3i d\u00f9ng k\u00ednh vi\u1ec5n v\u1ecdng m\u1edbi quan s\u00e1t \u0111\u01b0\u1ee3c nh\u01b0ng n\u0103ng l\u1ef1c ph\u00e1t s\u00e1ng c\u1ee7a ch\u00fang v\u1eabn r\u1ea5t m\u1ea1nh, ch\u1eb3ng qua l\u00e0 v\u00ec ch\u00fang c\u00e1ch ta qu\u00e1 xa cho n\u00ean nh\u00ecn kh\u00f4ng s\u00e1ng m\u00e0 th\u00f4i.<\/p>\n\n\n\n
\u0110\u1ec3 so s\u00e1nh n\u0103ng l\u1ef1c ph\u00e1t s\u00e1ng th\u1ef1c t\u1ebf c\u1ee7a c\u00e1c h\u00e0nh tinh, n\u00ean \u0111\u1eb7t ch\u00fang v\u00e0o nh\u1eefng c\u1ef1 ly c\u00e1ch ta \u0111\u1ec1u nhau \u0111\u1ec3 so s\u00e1nh. \u0110i\u1ec1u \u0111\u00f3 gi\u1ed1ng nh\u01b0 ch\u1ea1y thi, t\u1ea5t c\u1ea3 c\u00e1c v\u1eadn \u0111\u1ed9ng vi\u00ean \u0111\u1ec1u ph\u1ea3i \u0111\u1ed3ng th\u1eddi ch\u1ea1y t\u1eeb v\u1ea1ch xu\u1ea5t ph\u00e1t. C\u0103n c\u1ee9 quy \u0111\u1ecbnh qu\u1ed1c t\u1ebf, v\u1ea1ch xu\u1ea5t ph\u00e1t n\u00e0y c\u1ee7a c\u00e1c h\u00e0nh tinh l\u00e0 kho\u1ea3ng c\u00e1ch 10 gi\u00e2y, t\u1ee9c l\u00e0 32,62 n\u0103m \u00e1nh s\u00e1ng. Quy \u0111\u1ecbnh \u0111\u1ed9 s\u00e1ng c\u1ee7a c\u00e1c h\u00e0nh tinh \u1edf ti\u00eau chu\u1ea9n c\u1ef1 ly n\u00e0y l\u00e0 \u0111\u1ed9 s\u00e1ng tuy\u1ec7t \u0111\u1ed1i, d\u00f9ng c\u1ea5p tuy\u1ec7t \u0111\u1ed1i \u0111\u1ec3 bi\u1ec3u th\u1ecb.<\/p>\n\n\n\n
V\u1eadn \u0111\u1ed9ng vi\u00ean c\u00f3 th\u1ec3 c\u00f9ng xu\u1ea5t ph\u00e1t t\u1eeb v\u1ea1ch xu\u1ea5t ph\u00e1t, nh\u01b0ng \u0111\u1ed1i v\u1edbi c\u00e1c h\u00e0nh tinh th\u00ec ta kh\u00f4ng th\u1ec3 \u0111\u01b0a ch\u00fang v\u1ec1 c\u00f9ng m\u1ed9t c\u1ef1 ly 10 gi\u00e2y \u0111\u01b0\u1ee3c, cho n\u00ean c\u1ea5p sao tuy\u1ec7t \u0111\u1ed1i \u0111\u1ec1u do t\u00ednh to\u00e1n m\u00e0 ra.<\/p>\n\n\n\n
\u0110\u1ed9 s\u00e1ng nh\u00ecn th\u1ea5y c\u1ee7a M\u1eb7t Tr\u1eddi l\u00e0 qu\u00e1n qu\u00e2n tuy\u1ec7t \u0111\u1ed1i. M\u1ed9t khi \u0111\u1eb7t n\u00f3 v\u00e0o c\u1ef1 ly 10 gi\u00e2y, t\u1ee9c 2,06 tri\u1ec7u l\u1ea7n xa h\u01a1n th\u00ec c\u1ea5p sao tuy\u1ec7t \u0111\u1ed1i c\u1ee7a n\u00f3 l\u00e0 +4,8. N\u0103m thi\u00ean th\u1ec3 d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 c\u1ea5p sao nh\u00ecn th\u1ea5y, n\u1ebfu s\u1eafp x\u1ebfp theo c\u1ea5p sao tuy\u1ec7t \u0111\u1ed1i th\u00ec th\u1ee9 t\u1ef1 c\u1ee7a ch\u00fang \u0111\u1ea3o ng\u01b0\u1ee3c l\u1ea1i:<\/p>\n\n\n\n
T\u1eeb kho\u00e1: \u0110\u1ed9 s\u00e1ng nh\u00ecn th\u1ea5y; C\u1ea5p sao nh\u00ecn th\u1ea5y; \u0110\u1ed9 s\u00e1ng tuy\u1ec7t \u0111\u1ed1i; C\u1ea5p sao tuy\u1ec7t \u0111\u1ed1i.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c sao tr\u00ean tr\u1eddi c\u00f3 ng\u00f4i s\u00e1ng, ng\u00f4i t\u1ed1i. Nh\u01b0 ta \u0111\u00e3 bi\u1ebft b\u00f3ng \u0111\u00e8n \u0111i\u1ec7n 600 W s\u00e1ng h\u01a1n b\u00f3ng \u0111\u00e8n 20 W, \u0111\u00f3 l\u00e0 v\u00ec s\u1ee9c ph\u00e1t ra \u00e1nh s\u00e1ng c\u1ee7a ch\u00fang kh\u00e1c nhau. V\u1eady c\u00f3 ph\u1ea3i c\u00e1c ng\u00f4i sao s\u00e1ng c\u00f3 n\u0103ng l\u1ef1c ph\u00e1t ra \u00e1nh s\u00e1ng m\u1ea1nh h\u01a1n c\u00e1c ng\u00f4i sao […]<\/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-7219","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\/7219","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=7219"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7219\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}