* Mercury: Named after the Roman messenger god, Mercury is the smallest and innermost planet in our solar system.

* Venus: Named after the Roman goddess of love and beauty, Venus is the brightest object in the sky after the sun and moon.

* Mars: Named after the Roman god of war, Mars is known for its reddish appearance due to iron oxide on its surface.

* Jupiter: Named after the Roman king of the gods, Jupiter is the largest planet in our solar system.

* Saturn: Named after the Roman god of agriculture, Saturn is known for its prominent ring system.

These five planets are easily visible to the naked eye and have been observed and tracked by ancient civilizations around the world, leading to their inclusion in early astronomical models and mythology.