Copyright:Terrastro
原文:
Comet 252P/Linear’s lovely greenish coma is easy to spot in this expansive southern skyscape. Visible to the naked eye from the dark site near Flinders, Victoria, Australia, the comet appears tailless. Still, its surprisingly bright coma spans about 1 degree, posed here below the nebulae, stars, and dark rifts of the Milky Way. The five panels used in the wide-field mosaic were captured after moonset and before morning twilight on March 21. That was less than 24 hours from the comet’s closest approach, a mere 5.3 million kilometers from our fair planet. Sweeping quickly across the sky because it is so close to Earth, the comet should be spotted in the coming days by northern hemisphere comet watchers. In predawn but moonlit skies it will move through Sagittarius and Scorpius seen toward the southern horizon. That’s near the triangle formed by bright, yellowish, Mars, Saturn, and Antares at the upper left of this frame.
中文翻譯:
在這幅壯觀的南天星空中，252P/LINEAR 彗星的迷人綠色彗髮格外引人注目。在澳洲維多利亞州 Flinders 的黑暗觀星地點，這顆彗星可用肉眼輕易地觀察到，儘管它的尾巴並不明顯，但它明亮的彗髮直徑約一度，呈現在銀河系的星雲、恆星和幽暗空隙的下方。這個寬幅馬賽克圖由五個面板組成，於3月21日的月落後及黎明前拍攝，那時距離彗星的最近接近不到24小時，僅僅5.3百萬公里。因為距離地球如此接近，這顆彗星在空中快速移動，未來幾天北半球的觀星者應該能夠觀察到它。在月光下的清晨時分，它將穿過人馬座 (Sagittarius) 和天蠍座 (Scorpius)，朝向南方地平線移動。在畫面的左上角，則是明亮的黃色火星 (Mars)、土星 (Saturn) 和心宿二 (Antares) 所形成的三角形。
#252P_LINEAR #彗星 #天文 #銀河系 #星空 #觀星 #Flinders #維多利亞 #南半球 #Astronomy #CometWatching #NightSky #MilkyWay #Astrophotography #Mars #Saturn #Antares
來源:NASA每日圖片
