Neptune

Neptune is the eighth and final planet in the solar system. Blue Neptune is one of the solar system's gas giants. Unlike Earth, gas giants are mostly hydrogen, helium, and methan gases. The methane gas on Neptune gives the planet its blue color because the gas absorbs the red light and reflects the blue light back into space. Although not seen in the picture, it has very faint rings.

The Great Dark Spot, the dark oval on the planet, was a storm like the Great Red Spot on Jupiter. The storm has disappeared recently but data indicates another spot was found on the planet in a different place. The atmosphere shows lots of activity including the white clouds of methan ice crystals that can sometimes been seen.

The unusual texture of one of Neptune's mons, Triton, reminds some people of a cantaloupe. It is the largest moon to orbit backwards around a planet.

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune