Caption: The constellation Sagittarius along with its bright stars and surrounding constellations. Sagittarius is surrounded by (going clockwise from the top) Aquila, Scutum, Serpens Cauda, Ophiuchus, Scorpius, Corona Australis, Telescopium, Microscopium and Capricornus. The brighter stars in Sagittarius form a distinctive teapot shape. Sagittarius lies on the ecliptic (shown here as a blue line), this is the path the Sun appears to take across the sky over the course of a year. The Sun is in Sagittarius from mid December to mid January. The other planets of the Solar System can often be found in Sagittarius. Sagittarius lies south of the celestial equator. The famous teapot asterism is visible for all but the most arctic regions of the world but the most southerly parts of the constellation are not visible in northern parts of Asia, Europe and North America. Sagittarius is most visible in the evenings in the northern hemisphere summer and southern hemisphere winter. The supermassive black hole Sagittarius A* which lies at the center of our Milky Way Galaxy is sits on the western (here right-hand) edge of Sagittarius. Due to it covering an area at the center of our Galaxy, Sagittarius is home to many star clusters including open clusters (marked here with yellow circles) and globular clusters (marked here with yellow circles with + signs superimposed on them). Three nebulae are also marked here with green squares. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the line marking the ecliptic, nor the lines joining the stars appear on the sky.
Credit: Adapted by the IAU Office of Astronomy for Education from the original by IAU/Sky & Telescope

Caption: 黃道星座室女座與周邊星座示意圖。從頂部開始沿順時針方向，室女座周邊的星座依次為：後發座、獅子座、巨爵座、烏鴉座、天秤座和牧夫座。室女座最亮的恆星是角宿一，位於該圖中央、黃道下方。可用如下的”春季大弧線“在夜空中定位角宿一：順著北斗七星的斗柄出發，延伸至牧夫座的大角星，再沿直線向下尋找，就可以找到角宿一。可用口訣來記憶：“順著斗柄至大角，直下尋得角宿一。”角宿一的位置略低於黃道——從地球看來，太陽以一年為週期在天球上移動，所經過的路徑稱為黃道，在圖中以藍色實線標注。太陽在每年九月中旬到十月下旬位於室女座。太陽系中的其他行星也經常出現在室女座。 室女座橫跨天赤道，因此在地球上的任何地方，一年中的某些時候都能看到其部分天區。但在地球南北兩極，室女座的部分天區會被遮蔽。室女座在北半球的春季和南半球的秋季夜晚最適宜觀測。 室女座常被描繪為背靠黃道平躺的少女形象，雙臂向兩側舒展，雙足則指向東方。室女座內可見多個深空天體，包括NGC 4697、M49、M87、M86、M84和M60，在圖中均以紅色橢圓標注。這些天體都是旋渦星系與橢圓星系，距離地球數百萬光年，均屬於離銀河系最近的星系團——室女座星系團。其中M87星系尤為值得注意，其核心的超大質量黑洞於2019年被事件視界望遠鏡成功拍攝，這是人類拍攝到的首張黑洞照片。這個黑洞被命名為Pōwehi，在夏威夷語中意為”無限創造的黑暗源泉“。 該圖的縱軸為赤緯，橫軸為赤經，方向為上北下南左東右西。圖中標注的恆星大小對應其視星等——衡量天體視亮度的標準，較大的圓點代表著較亮的恆星。圖中的希臘字母標注著星座中最亮的恆星。這些恆星按亮度排序，最亮的一般被標記為α星，第二亮的一般為β星，等等，不過這種字母排序並不總是和實際亮度排序完全一致。圖中虛線標注的是國際天文學聯合會劃定的星座邊界，綠色實線則是一種常見的星座形象連線。需要注意的是，在實際觀測時，這些邊界與連線都不會出現在天空中。
Credit: 國際天文學聯合會天文教育辦公室（IAU OAE）根據國際天文學聯合會和《天空與望遠鏡》的原文改編