Astronomy Picture of the Day . ... Dark Markings of the Sky . ... Barnard's markings are dark nebulae, interstellar clouds of obscuring gas and dust. Moon and Morning Star . ... Wednesday, the Moon and Venus rose together in early morning skies. ... The View Near a Black Hole . ... Discovered by accident, this manuscript page provides graphical insight to astronomy in medieval times, before the Renaissance and the influence of Nicolaus Copernicus, Tycho de Brahe, Johannes Kepler, and Galileo. ...