1、天文学导论第三部分 星系与宇宙学第 08讲 银河系 The Milky Way / The Galaxy第 09讲 河外星系 Extragalactic Galaxies第 10讲 活动星系核 Active Galactic Nuclei (AGN)第 11讲 宇宙学 Cosmology天文学导论第 11讲 银河系O Milky Way, sister in whitenessTo Canaans rivers and the bright Bodies of lovers drowned,Can we follow toilsomelyYour path to other nebulae?G
2、uillaume Apollinaire (1880-1918) 本讲内容1. 银河系多波段图像2. 银河系研究简史3. 银河系的结构4. 银河系的自转5. 银晕：暗物质6. 银河系旋涡图样的测定7. 核球与 银心：超大质量黑洞的证据1。银河系多波段图像 银河是天空中的一个光（环）带，在人马座附近最亮、最宽，它的中心线近似为天球上的一个大圆 银河的传说 中国民间传说 西方神话：奶之路 Milky Way 银河系广角图像光学波段的银河系The optical sky is dominated by the light of billions of stars in the Milky Way.
3、Dark patches are caused by obscuration of the starlight by interstellar dust21 厘米中性氢射电辐射的银河系21 radio emission by neutral H in the interstellar gas. The radio emission is not absorbed by the dust clouds. Most of the H gas is concentrated in a very thin layer in the Milky Way近红外波段的银河系大小麦哲伦星云远红外波段的银河系A
4、t shorter wavelengths (white) we see a bulge 核球 of stars (mainly red giants) at the center of the Milky Way.At longer wavelengths (red) we see the emission from the dust clouds.X射线波段的银河系蓝色圆点表示银河系内的 X射线双星和超新星遗迹 射线波段的银河系This all-sky view from Fermi reveals bright emission in the plane of the Milky Way (center), bright pulsars and super-massive black holes
