NASAさんのインスタグラム写真 - (NASAInstagram)「The blue and orange stars of the faint galaxy named NGC 2188 sparkle in this image taken with @NASAHubble. NGC 2188 is estimated to be just half the size of our Milky Way, at 50,000 light-years across, and it is situated in the constellation of Columba (the Dove). Although NGC 2188 appears at first glance to consist solely of a narrow band of stars, it is classified by astronomers as a barred spiral galaxy. It appears this way from our viewpoint on Earth as the center and spiral arms of the galaxy are tilted away from us, with only the very narrow outer edge of the galaxy’s disk visible to us. Astronomers liken this occurrence to turning a dinner plate in your hands so you see only its outer edge. The true shape of the galaxy was identified by studying the distribution of the stars in the inner central bulge and outer disk and by observing the stars’ colors. Credit: ESA/Hubble & NASA, R. Tully #nasagoddard #Hubble #space #science #astronomy #spaceimage #spacepic #nasa」9月10日 2時21分