Public domain
Spitzer Makes Invisible Visible
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
Hidden behind a shroud of dust in the constellation Cygnus is a stellar nursery called DR21, which is giving birth to some of the most massive stars in our galaxy. Visible light images reveal no trace of this interstellar cauldron because of heavy dust obscuration. In fact, visible light is attenuated in DR21 by a factor of more than 10,000,000,000,000,000,000,000,000,000,000,000,000,000 (ten thousand trillion heptillion).
NASA Image and Video Library’s own descriptionSubjects
Credit lineSpitzer Makes Invisible Visible. NASA/JPL, 2004-04-13. Public domain. ID: PIA05734.
