|____ is the smallest planet and the closest to the Sun.
|____ has an atmosphere of 78% nitrogen and 21% oxygen.
|____ has a very dense, mostly carbon dioxide atmosphere.
|____ is the largest planet. Ganymede is its largest moon.
|____ appears red due to the iron oxide dust on its surface.
|____ has spectacular rings. Titan is its largest moon.
|____ appears vivid bright blue. Triton is its largest moon.
|____ was the first planet discovered using a telescope (1781).