English: Tycho: 85 kilometer impact crater on the Moon, in the southern part of the visible side. It is named after the Danish astronomer and alchemist of XVI century Tycho Brahe. Tycho is not the biggest, but one of the most prominent lunar craters: it surrounded by the most notable ray system on the Moon. The rays were formed by light soil thrown out at the impact which formed the crater. They are best seen when the moon is full, but visible even when they are lit with light reflected by Earth. Tycho is a young crater: according to radiometric dating, it is 108 million years old. For comparison, the age of most large craters on the moon is about 3.9 billion years old. This image was created in Adobe Illustrator graphic design software and is fully vector image without using any photo.