Keywords
astronomy, black background, center, color image, concept, core, cross section, crust, cutaway view, diagram, digitally generated image, evolution, formation, geology, globe, illustration, interior, layered, mantelpiece, mars, middle, no people, physics, planet, planetary science, schematic, science, section, separation, single object, solar system, space, space physics, terrestrial, vertical, stock illustration, royalty free illustrations, stock clip art icon, stock clipart icons, logo, line art, EPS picture, pictures, graphic, graphics, drawing, drawings, vector image, artwork, EPS vector arts, fine art prints, print, poster, posters, mural, wall murals, stk204114s