Taken by the NASA/ESA Hubble Space Telescope, the Oyster Nebula is essentially a giant cloud of dust and electrically charged gases. Nebulas are often made to glow, as seen here, by the radiation from a nearby star. See http://www.esa.int/spaceinimages/Images/2016/09/Hubble_views_a_cosmic_oyster_and_pearl_in_NGC_1501
