in addition to the earth how many planets can be seen with the unaided eye
Classical planet In classical antiquity, the sacred Seven Luminaries or what we now call the Seven Classical Planets are the seven non-fixed objects visible in the sky with the naked-eye: the Moon, Mercury, Venus, the Sun, Mars, Jupiter, and Saturn. The word planet comes from the Greek word πλανήτης, planētēs "wanderer" (short for asteres planetai "wandering stars"), expressing the fact that these objects move across the celestial sphere relative to the fixed stars.[1]
Extraterrestrial skies Characteristics of extraterrestrial skies appear to vary substantially due to a number of factors. An extraterrestrial atmosphere, if present, has a large bearing on visible characteristics. The atmosphere's density and chemical composition can contribute to differences in colour, opacity (including haze) and the presence of clouds. Astronomical objects may also be visible and can include natural satellites, rings, star systems and nebulas and other planetary system bodies.