Astronomy Picture of the Day 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. 2013 July 28 Hoag's Object: A Strange Ring Galaxy Image Credit: Credit: R. Lucas (STScI/AURA), Hubble Heritage Team, NASA Explanation: Is this one galaxy or two? This question came to light in 1950..