Tags: space, astronomers, found, youngest, stars, seen, thanks, herschel, observatory, dense, envelopes, dust, surround, fledging, protostars, detection, difficult
Tags: space, located, monoceros, constellation, infrared, image, nasas, spitzer, telescope, allows, clusters, protostars, pink, spectra, theyre, nicknamed, christmas, tree, cluster, snowflake
Tags: space, elephants, trunk, light-years, contains, material, star, formation, hiding, protostars, obscuring, cosmic, dust