Who thought space could be so festive? This #Hubble bubble that resembles a holiday ornament shows a ring from gas that is being shocked by the expanding blast wave from a supernova. The ring looks small from where we stand, yet it's actually 23 light-years across and expands at more than 11 million miles per hour. Credit: NASA #happyholidays2015 #nasa #space #universe #astrophotography