https://www.space.com/6209-infrared-image-swan-nebula.html
Spitzer telescope has captured a new view of the star-making cloud, M17.
infrared imageswan nebulanewspace
https://www.ibtimes.sg/nasas-sofia-observatory-answers-mystery-surrounding-swan-nebulas-formation-37293
New images taken by the SOFIA observatory of the Swan Nebula allowed NASA to understand how it was formed
swan nebulanasasofiaobservatoryanswers