NASA. LARGE FORMAT. DEEP SPACE. Superb photograph of a star cluster containing massive stars that produce intense radiation, expel matter at high velocity and rush through their evolution to explode into supernovas. The winds and shock waves carve out huge cavities called superbubbles in the surrounding gas. 2012.period chromogenic print. Numbering in the margin on the front. 40.6 X 40.6CM with margins.