Just listened to an interesting online talk (https://www.facebook.com/photo?fbid=1226813279484418) about the Tata Institute of Fundamental Research (TIFR) #Balloon Facility (https://www.tifr.res.in/bf/) - here are the slides about astronomical observations they do; see also https://arxiv.org/abs/2112.04877 for a 2021 review paper about this work and the mentioned papers https://www.aanda.org/articles/aa/full_html/2013/08/aa21614-13/aa21614-13.html ("Large-scale mapping of the massive star-forming region RCW38 in the [CII] and PAH emission") and https://www.aanda.org/articles/aa/full_html/2021/07/aa35739-19/aa35739-19.html ("[CII] emission properties of the massive star-forming region RCW 36 in a filamentary molecular cloud").
