... But this uncommonly beautiful sunset picture was taken on a special day, the Equinox on September 22. ... What is that strange arc? ... NGC 3621: Far Beyond the Local Group . ... The Tarantula Nebula is more than 1,000 light-years in diameter -- a giant star forming region within our neighboring galaxy the Large Magellanic Cloud (LMC). ... NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. ...