Astronomy Picture of the Day . ... 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. ... In the center of globular cluster Omega Centauri, stars are packed in 10,000 times more densely than near our Sun. ... Star Trails Over Oregon . ...