Caption: 2022 年国际天文学联合会 OAE 天体摄影比赛第二名，类别：天体图案的时间流逝。 天狼星是夜空中最亮的恒星，它时而升起，时而落下，时而掠过。有时还能看到猎户座、金牛座和昴星团等星座和小行星。在第一个场景中，上述星座被半透明的金色面纱遮住。接下来的场景中，它在深蓝色的夜空中升起。在其中一个场景中，一颗行星明亮地点缀着暗淡的双鱼座。 这些视频是在地球上各种景观和文化遗产的上空拍摄的。其中一些只是简单地展示了沙漠中的古迹，而另一些则展示了挥舞着树叶的棕榈树。 2022年IAU OAE天文摄影大赛天体运动时间序列类别二等奖 天狼星是夜空中最亮的恒星，照片中展现了它的升起、落下及穿越天空的轨迹。有时还能看到星座和星群，包括猎户座、金牛座和昴星团。在第一场景中，这些星座被半透明的金色薄雾笼罩。接下来的场景展示了它在深蓝色夜空中升起的情景。在其中一个场景中，一颗明亮的行星点缀在微弱的双鱼座星群中。 这些视频取景于地球上的多种自然景观和文化遗址。一些画面展示了沙漠中的历史遗迹，而另一些则拍摄了带有摇曳棕榈树的风景。
Credit: 阿米尔雷扎·卡姆卡尔/国际天文学联合会教育办公室

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