2025年1月22日
The North America Nebula
Image Credit & Copyright: Dimitris Valianos
Explanation: The North America nebula on the sky can do what the North America continent on Earth cannot — form stars. Specifically, in analogy to the Earth-confined continent, the bright part that appears as the east coast is actually a hot bed of gas, dust, and newly formed stars known as the Cygnus Wall. The featured image shows the star forming wall lit and eroded by bright young stars and partly hidden by the dark dust they have created. The part of the North America nebula (NGC 7000) shown spans about 50 light years and lies about 1,500 light years away toward the constellation of the Swan (Cygnus).
Jigsaw Challenge: Astronomy Puzzle of the Day
Tomorrow’s picture: little hat, big galaxy
北美洲星云
影像提供与版权: Dimitris Valianos
说明: 天空中的北美洲星云，能做到地球上的北美洲无法做到的事——形成恒星。较具体来说，形似地球北美洲明亮东岸的天鹅座墙，其实是气体、尘埃和新诞生恒星的复合体。如这幅主题影像所示，这道恒星诞生之墙正受到年轻亮星的照耀和侵蚀，而这些新恒星所产生的黝黑尘埃也遮掩了部分的墙体。影像所呈现的部分北美洲星云（NGC 7000），宽约50光年，位于天鹅 座方向约1,500光年远之处。
拼图挑战: 每日天文学拼图
明日的图片: little hat, big galaxy
