银河、火箭发射与降落
影像来源与版权:Devin Boggs

说明:肉眼所见的银河没这么明亮与色彩缤纷,不过,火箭发射的景观倒是分毫不差。因此要制做出这幅夜空组合影像,得使用灵敏的数位相机,进行了长曝光摄影取得另一张照片,以突显我们银河系中央盘面的繁星和尘埃云。这张摄于梅里特岛野生动物保护区的影像,组合一张20分钟长曝光银河照片,与及另一张紧接着拍摄的9分钟长曝光影像,以记录火箭发射与降落。猎鹰九号火箭的名称,源自星际大战电影的千年鹰号太空船,而它在5月4日的清晨,推送翔龙号补给船前往国际太空站。在火箭发射弧顶点的烟尘和亮光,来自在此时点燃的第一节火箭返回助推器。其他二道较短的斜向线形光痕,则来自火箭点燃喷发,以协助猎鹰九号第一级火箭,返回并降落在泊于海上的自动驾驶船“当然我仍然爱你”号之上。
翻译:“每日一天文图”成大物理分站

Milky Way, Launch, and Landing
Image Credit & Copyright: Devin Boggs

Explanation: The Milky Way doesn’t look quite this colorful and bright to the eye, but a rocket launch does. So a separate deep exposure with a sensitive digital camera was used in this composite skyscape to bring out our galaxy’s central crowded starfields and cosmic dust clouds. In the scene from Merritt Island National Wildlife Refuge, a nine minute long exposure begun about 20 minutes after the Miky Way image recorded a rocket launch and landing. The Falcon 9 rocket, named for the Millennium Falcon of Star Wars fame, appropriately launched a Dragon resupply ship to the International Space Station in the early morning hours of May the 4th. The plume and flare at the peak of the launch arc mark the rocket’s first stage boost back burn. Two shorter diagonal streaks are the rocket engines bringing the Falcon 9 stage back to an offshore landing on autonomous drone ship “Of course I Still Love You”.
Astronomy Picture of the Day 05/11/2019