Caption: 2021 年國際天文學聯合會 OAE 天體攝影比賽廣域組第三名。 這張豐富的全景影像展現了一系列星座、深空天體和行星。畫面中左部偏中央的淺紅色光點是火星。影像最左下方、建築斜屋頂上方的兩個緊鄰光點分別是木星（較亮）和土星。畫面最右側兩團雲霧狀物體是大麥哲倫雲與小麥哲倫雲——它們是銀河系的衛星矮星系，分別距離地球約16萬光年和20萬光年。仙女座星系（距地球約254萬光年）在影像中呈現為火星與地平線最亮光帶（靠近地平線）之間的一小塊傾斜斑痕，這片明亮光暈並非來自太陽或月亮，而是聖佩德羅-德阿塔卡馬市的燈光。 顯著的星座包括：獵戶座——可通過三顆排成直線的腰帶星辨識；金牛座——獵戶座左側由淺橙色恆星畢宿五（Aldebaran）為頂點的三角形星群；大犬座——獵戶座右下方以夜空中最亮恆星天狼星（Sirius）為核心、前景天文臺圓頂上方三角形排列的三星；飛馬座——火星下方對角線方向的梯形星座。其他可見星座還有仙女座、英仙座和白羊座。全球不同文化為這些星座賦予了各自的名稱與豐富傳說。 獵戶座腰帶右上方斜向排列的劍鞘星群中，粉紅色斑塊（肉眼觀測呈模糊星點）是距離地球1500光年的獵戶座大星雲——一個恆星誕生的搖籃。金牛座左側的緻密模糊斑塊是昴星團。恆星的顏色差異源於表面溫度差異，例如獵戶座腰帶左下方的紅橙色恆星是紅巨星參宿四（Betelgeuse）。較冷的恆星呈現紅色，高溫恆星則呈白色或藍色。影像中增強的色彩效果源於數碼相機相比人眼更高的感光能力。
Credit: Robert Barsa/IAU OAE

Caption: 雙魚座及其明亮恆星與周邊星座示意圖。從頂部開始沿順時針方向，雙魚座周邊的星座依次為：仙女座、飛馬座、寶瓶座、鯨魚座、白羊座和三角座。雙魚座位於黃道上。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。太陽在每年三月中旬到四月中旬位於雙魚座。因此，春分時太陽位於雙魚座——黃道在這裡與天赤道相交，而太陽在春分時的位置即為赤道坐標系中赤經坐標的原點。太陽系中的其他行星也經常出現在雙魚座。 雙魚座橫跨天赤道，因此在地球上的任何地方，一年中的某些時候都能看到它。在地球南北兩極，雙魚座的某些部分可能不可見。雙魚座在北半球的秋季和南半球的春季夜晚最適宜觀測。 宏偉的螺旋星系M74在圖中以紅色小圓圈標注。 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

Caption: The constellation Aries along with its bright stars and surrounding constellations. Aries is surrounded by (going clockwise from the top) Triangulum, Pisces, Cetus, Taurus and Perseus. Aries 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 Aries from mid April to mid May. The other planets of the Solar System can often be found in Aries. Aries lies just north of the celestial equator and is thus visible at some time in the year from all of planet Earth except for the most antarctic regions of the world. Aries is most visible in the evenings in the northern hemisphere winter and southern hemisphere summer. 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: The constellation Taurus along with its bright stars and surrounding constellations. Taurus is surrounded by (going clockwise from the top) Perseus, Aries, Cetus, Eridanus, Orion, Gemini and Auriga. Taurus’s brightest star Aldebaran appears in the middle of the constellation. Taurus 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 Taurus from mid May to late June. The other planets of the Solar System can often be found in Taurus. Taurus lies mostly north of the celestial equator with a small part in the celestial southern hemisphere. The whole constellation is visible at some point in the year to whole planet except for the Antarctic and a small region around the North Pole. Taurus is most visible in the evenings in the northern hemisphere winter and southern hemisphere summer. In the eastern part of Taurus we can find the supernova remnant M1 (commonly known as the Crab Nebula), marked here with a green square. In Taurus’s north-east find one of the sky’s most famous open stars clusters M45 (the Pleiades), marked here with a yellow circle. Many of the stars near Aldebaran (but not) Aldebaran are members of another star cluster, the Hyades. However this cluster is close to the solar system so is too dispersed on the sky to have a Messier object designation like the Pleiades has. 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: The constellation Triangulum with its bright stars and surrounding constellations. Triangulum is surrounded by (going clockwise from the top): Andromeda, Pisces, Aries and Perseus. Triangulum is a northern constellation and thus the whole constellation is visible at some point in the year throughout the northern hemisphere. The whole constellation is also visible from equatorial and most temperate regions of the southern hemisphere. Triangulum is best viewed in the evening in the northern hemisphere winter and southern hemisphere summer. The Triangulum Galaxy M33 lies in the constellation. This spiral galaxy is the third largest member of the local group of galaxies after the Andromeda Galaxy and Milky Way. It is marked here with a red ellipse. 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. The blue line at the bottom left of the diagram marks the ecliptic. Neither the constellation boundaries, nor the lines joining the stars, nor the ecliptic, appear on the sky.
Credit: Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope