Tycho and Copernicus Craters
This picture of the Full Moon through even a small telescope is stunning. The moon's surface is so clear that even the details of smaller craters are easiy visible. There are two craters, however, that seem to sprout circular systems of small bright lines all around them. Scientists call these lines "rays" They are strings of dust and debris tossed up and then collapsed back onto the Moon's surface. The huge craters, Tyco, top right and Copernicus, lower center, each with their huge ray systems, are clearly visible. Each crater is nearly 100 miles in diameter.