Caption: 2022 年國際天文學聯合會 OAE 天體攝影比賽第二名，類別：天體圖案的時間流逝。 天狼星是夜空中最亮的恆星，它時而升起，時而落下，時而掠過。有時還能看到獵戶座、金牛座和昴星團等星座和小行星。在第一個場景中，上述星座被半透明的金色面紗遮住。接下來的場景中，它在深藍色的夜空中升起。在其中一個場景中，一顆行星明亮地點綴著暗淡的雙魚座。 這些視頻是在地球上各種景觀和文化遺產的上空拍攝的。其中一些只是簡單地展示了沙漠中的古蹟，而另一些則展示了揮舞著樹葉的棕櫚樹。 2022年IAU OAE天文攝影大賽天體運動時間序列類別二等獎 天狼星是夜空中最亮的恆星，照片中展現了它的升起、落下及穿越天空的軌跡。有時還能看到星座和星群，包括獵戶座、金牛座和昴星團。在第一場景中，這些星座被半透明的金色薄霧籠罩。接下來的場景展示了它在深藍色夜空中升起的情景。在其中一個場景中，一顆明亮的行星點綴在微弱的雙魚座星群中。 這些視頻取景於地球上的多種自然景觀和文化遺址。一些畫面展示了沙漠中的歷史遺跡，而另一些則拍攝了帶有搖曳棕櫚樹的風景。
Credit: 阿米爾雷扎·卡姆卡爾/國際天文學聯合會教育辦公室

Caption: The constellation Canis Major along with its bright stars and its surrounding constellations. Canis Major is surrounded by (going clockwise from the top): Monoceros, Lepus, Columba and Puppis. The constellation is dominated by Sirius, the star which appears brightest in the night sky, which far outshines all of the other stars in the constellation. Canis Major lies just south of the celestial equator and is visible from all of the southern hemisphere as well as equatorial and temperate regions of the northern hemisphere. Sirius is visible from all but the most arctic regions. Canis Major is most visible in the evenings in late winter in the northern hemisphere and late summer in the southern hemisphere. The open star clusters M41, NGC 2360 and NGC 2362 lie in the constellation. These are marked with yellow circles. 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 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