... Amazing Comet Holmes . ... A stunningly rapid outburst transformed it from a faint comet quietly orbiting the Sun with a period of about 7 years to a naked-eye comet rivaling the brighter stars in the constellation Perseus. Great Orion Nebulae . ... The Great Nebula in Orion, also known as M42, is one of the most famous nebulae in the sky. The star forming region's glowing gas clouds and hot young stars.. ... But Orion's stars and nebulas don't look quite as colorful to the eye as they.. ...