▽Astronomy Picture of the Day ●12/23 00:07 Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.2024 December 22The Local FluffIllustration Credit: NASA, SVS, Adler, U. Chicago, WesleyanExplanation: The stars are not alone. In the disk of our Milky Way Galaxy,about 10 percent of visible matter is in the form of gas