NASAさんのインスタグラム写真 - (NASAInstagram)「Captured by @NASAHubble, this image shows NGC 7513, a barred spiral galaxy. Located approximately 60 million light-years away, NGC 7513 lies within the Sculptor constellation in the Southern Hemisphere. This galaxy is moving at the astounding speed of 972 miles per second, and it is heading away from us. For context, Earth orbits the Sun at about 19 miles per second. Though NGC 7513’s apparent movement away from the Milky Way might seem strange, it is not that unusual. While some galaxies, like the Milky Way and the Andromeda galaxy, are caught in each other’s gravitational pull and will eventually merge together, the vast majority of galaxies in our universe appear to be moving away from each other. This phenomenon is due to the expansion of the universe, and it is the space between galaxies that is stretching, rather than the galaxies themselves moving. Image credit: ESA/Hubble & NASA, M. Stiavelli #nasagoddard #Hubble #space #science #astronomy #spaceimage #spacepic #nasa」7月12日 11時08分