Don Davis (artist)
Don Davis (Donald E. Davis, born October 21, 1952) is a space artist known for his portrayals of space-related subjects. His work is characterised by attention to detail and authentic portrayals based on what is known of the subject. Chesley Bonestell, considered by many to be one of the most accomplished practitioners of the space art genre, critiqued Davis' early paintings and encouraged him to pursue an artistic career. Davis worked for the U. S. Geological Survey's branch of Astrogeologic Studies during the Apollo Lunar expeditions and has since painted many images for NASA. The NASA art included portrayals of interiors of giant space colonies, based on the work of Gerard O'Neill. He was part of the team of space artists gathered to provide the visual effects for the PBS series ''Cosmos'' by Carl Sagan. Later he painted the cover of Sagan's Pulitzer Prize–winning book ''The Dragons of Eden''. Other books by Carl Sagan including Don's work are ''Comet'' and ''Pale Blue Dot'' ...
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Comet Shoemaker-Levy 9 Approaching Jupiter
A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently bright, a comet may be seen from Earth without the aid of a telescope and may subtend an arc of 30° (60 Moons) across the sky. Comets have been observed and recorded since ancient times by many cultures and religions. Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several milli ...
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