A teacher of astronomy and fellow of the Royal Astronomical Society, David Early combined his profession with his passion for painting in an exhibition of 40 cosmic pictures exhibited at the Luton Museum and Art Gallery in 1971. A critic writing for The New Scientist praised the amateur artist's 'combination of imagination and knowledge', which produced romantic, yet believable views of eclipses, rocket launches, and moonscapes. This particular scene is Early's 'interpretation of the creep of glassy lunar material into a rille'. Rille (German for 'groove') is typically used to describe any of the long, narrow depressions in the surface of the Moon that resemble channels. The Latin term is rima, plural rimae. Typically a rille can be up to several kilometers wide and hundreds of kilometers in length. However, the term has also been used loosely to describe similar structures on a number of planets in the Solar System, including Mars, Venus, and on a number of moons. All bear a structural resemblance to each other.