Nh\u1eefng \u0111\u00eam h\u00e8 tr\u1eddi quang, nh\u00ecn l\u00ean b\u1ea9u tr\u1eddi ch\u00fang ta s\u1ebd th\u1ea5y chi ch\u00edt c\u00e1c v\u00ec sao v\u00e0 r\u00e0nh r\u00e0nh l\u00e0 nhi\u1ec1u h\u01a1n h\u1eb3n so v\u1edbi \u0111\u00eam m\u00f9a \u0110\u00f4ng. T\u1ea1i sao v\u1eady? L\u00fd do l\u00e0 m\u00f9a h\u00e8 ch\u00fang ta \u0111\u1ee9ng \u1edf g\u1ea9n trung t\u00e2m ng\u00e2n h\u00e0, n\u01a1i c\u00f3 nhi\u1ec1u sao nh\u1ea5t, c\u00f2n m\u00f9a \u0110\u00f4ng, Tr\u00e1i \u0111\u1ea5t c\u1ee7a ch\u00fang ta \u0111\u1ee9ng \u1edf r\u00eca ng\u00e2n h\u00e0, n\u01a1i c\u00f3 \u00edt sao h\u01a1n.<\/p>\n\n\n\n
Trong h\u1ec7 ng\u00e2n h\u00e0 c\u1ee7a ch\u00fang ta (Milky Way) c\u00f3 kho\u1ea3ng 100 t\u1ef7 sao v\u00e0 ch\u1ee7 y\u1ebfu ph\u00e2n b\u1ed1 trong m\u1ed9t chi\u1ebfc \u201cb\u00e1nh tr\u00f2n\u201d. Ph\u1ea9n gi\u1eefa chi\u1ebfc b\u00e1nh n\u00e0y h\u01a1i d\u1ea9y h\u01a1n chung quanh. \u00c1nh s\u00e1ng \u0111i t\u1eeb ph\u00eda m\u00e9p \u201cb\u00e1nh\u201d b\u00ean n\u00e0y \u0111\u1ebfn ph\u00eda b\u00ean kia ph\u1ea3i m\u1ea5t 10 v\u1ea1n n\u0103m \u00e1nh s\u00e1ng, \u0111i t\u1eeb m\u1eb7t tr\u00ean xu\u1ed1ng m\u1eb7t d\u01b0\u1edbi b\u00e1nh c\u0169ng ph\u1ea3i m\u1ea5t 1 v\u1ea1n n\u0103m \u00e1nh s\u00e1ng.<\/p>\n\n\n\n
M\u1eb7t tr\u1eddi v\u00e0 nh\u1eefng h\u00e0nh tinh l\u00e1ng gi\u1ec1ng c\u1ee7a h\u1ec7 M\u1eb7t tr\u1eddi \u0111\u1ec1u n\u1eb1m trong h\u1ec7 ng\u00e2n h\u00e0. H\u1ea9u h\u1ebft nh\u1eefng sao m\u00e0 ch\u00fang ta nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng c\u0169ng \u0111\u1ec1u n\u1eb1m trong \u0111\u00f3. N\u1ebfu M\u1eb7t tr\u1eddi n\u1eb1m gi\u1eefa h\u1ec7 th\u00ec d\u00f9 ch\u00fang ta nh\u00ecn t\u1eeb ph\u00eda n\u00e0o c\u0169ng th\u1ea5y s\u1ed1 l\u01b0\u1ee3ng sao tr\u00ean tr\u1eddi nhi\u1ec1u nh\u01b0 nhau. Th\u1ebf nh\u01b0ng h\u1ec7 M\u1eb7t tr\u1eddi c\u00e1ch trung t\u00e2m h\u1ec7 ng\u00e2n h\u00e0 kho\u1ea3ng 3 v\u1ea1n n\u0103m \u00e1nh s\u00e1ng. Khi ch\u00fang ta nh\u00ecn v\u1ec1 ph\u00eda trung t\u00e2m ng\u00e2n h\u00e0 s\u1ebd th\u1ea5y \u1edf khu v\u1ef1c \u0111\u00f3 d\u00e0y \u0111\u1eb7c c\u00e1c v\u00ec sao. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu nh\u00ecn v\u1ec1 ph\u00eda \u0111\u1ed1i di\u1ec7n trung t\u00e2m ng\u00e2n h\u00e0 s\u1ebd ch\u1ec9 nh\u00ecn th\u1ea5y m\u1ed9t s\u1ed1 \u00edt sao trong m\u1ed9t ph\u1ea9n c\u1ee7a h\u1ec7.<\/p>\n\n\n\n
Tr\u00e1i \u0111\u1ea5t kh\u00f4ng ng\u1eebng quay quanh M\u1eb7t tr\u1eddi. V\u1ec1 m\u00f9a h\u00e8 Tr\u00e1i \u0111\u1ea5t chuy\u1ec3n \u0111\u1ed9ng \u0111\u1ebfn khu v\u1ef1c gi\u1eefa M\u1eb7t tr\u1eddi v\u00e0 h\u1ec7 ng\u00e2n h\u00e0 g\u1ecdi l\u00e0 \u0110\u1edbi ng\u00e2n h\u00e0. \u0110\u1edbi ng\u00e2n h\u00e0 l\u00e0 khu v\u1ef1c ch\u1ee7 y\u1ebfu c\u1ee7a h\u1ec7 ng\u00e2n h\u00e0, t\u1eadp trung nhi\u1ec1u sao c\u1ee7a h\u1ec7. B\u1ea9u tr\u1eddi \u0111\u00eam h\u00e8 ch\u00fang ta nh\u00ecn th\u1ea5y ch\u00ednh l\u00e0 \u0110\u1edbi ng\u00e2n h\u00e0 d\u00e0y \u0111\u1eb7c c\u00e1c v\u00ec sao. V\u1ec1 m\u00f9a \u0110\u00f4ng v\u00e0 c\u00e1c m\u00f9a kh\u00e1c, khu v\u1ef1c \u0110\u1edbi ng\u00e2n h\u00e0 n\u1eb1m v\u1ec1 ph\u00eda Tr\u00e1i \u0111\u1ea5t \u0111ang \u1edf ban ng\u00e0y, n\u00ean r\u1ea5t kh\u00f3 nh\u00ecn th\u1ea5y. C\u00f2n \u1edf m\u1eb7t kia c\u1ee7a Tr\u00e1i \u0111\u1ea5t (v\u00f9ng \u0111ang l\u00e0 \u0111\u00eam) s\u1ebd kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y n\u00f3. Do v\u1eady, \u0111\u00eam m\u00f9a h\u00e8 ch\u00fang ta nh\u00ecn th\u1ea5y nhi\u1ec1u sao h\u01a1n \u0111\u00eam m\u00f9a \u0110\u00f4ng.<\/p>\n","protected":false},"excerpt":{"rendered":"
Nh\u1eefng \u0111\u00eam h\u00e8 tr\u1eddi quang, nh\u00ecn l\u00ean b\u1ea9u tr\u1eddi ch\u00fang ta s\u1ebd th\u1ea5y chi ch\u00edt c\u00e1c v\u00ec sao v\u00e0 r\u00e0nh r\u00e0nh l\u00e0 nhi\u1ec1u h\u01a1n h\u1eb3n so v\u1edbi \u0111\u00eam m\u00f9a \u0110\u00f4ng. T\u1ea1i sao v\u1eady? L\u00fd do l\u00e0 m\u00f9a h\u00e8 ch\u00fang ta \u0111\u1ee9ng \u1edf g\u1ea9n trung t\u00e2m ng\u00e2n h\u00e0, n\u01a1i c\u00f3 nhi\u1ec1u sao nh\u1ea5t, c\u00f2n m\u00f9a \u0110\u00f4ng, […]<\/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":[1,15],"tags":[],"class_list":["post-10792","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10792","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=10792"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10792\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}