The Cat’s Paw Nebula, imaged here by NASA’s Spitzer Space Telescope using the MIPS and IRAC instruments, is a star-forming region that lies inside the Milky Way Galaxy. New stars may heat up the surrounding gas, which can expand to form “bubbles.” Image Credit: NASA/JPL-Caltech
Full story here:
https://www.jpl.nasa.gov/news/news.php?feature=7265&utm_source=iContact&utm_medium=email&utm_campaign=nasajpl&utm_content=spitzer20181023-1