The planet known for its retrograde rotation is Venus. Unlike most planets in our solar system that rotate counterclockwise, Venus rotates clockwise on its axis. This peculiar rotation means that, if you were standing on Venus, the Sun would rise in the west and set in the east, which is the opposite of Earth. Venus has a slow rotational period, taking about 243 Earth days to complete one rotation. Additionally, its thick atmosphere and high surface temperatures contribute to the unique environmental conditions on the planet, making Venus one of the most inhospitable places in the solar system.