Mercury image was taken by Mariner 10 Venus image by Magellan Earth and Moon images by Galileo Mars image by Mars Global Surveyor Jupiter image by Cassini, and Saturn, Uranus and Neptune images by Voyager. - Pluto is not shown as no spacecraft has yet visited it.
The inner planets (Mercury, Venus, Earth, Moon, and Mars) are roughly to scale to each other; the outer planets (Jupiter, Saturn, Uranus, and Neptune) are roughly to scale to each other.