Callisto - Fourth moon of Jupiter after Io - Europa - Ganymede. Formed of rock and ices Third largest moon in our solar system after Titan (Saturn) and Ganymede (Jupiter) respectively. Jupiter's Io being fourth and our Luna fifth.
This magnificent image is a portrait of the Earth taken in one single shot. At 121 megapixels, it is the highest resolution image of the planet ever and was taken by the geostationary Russian weather satellite the Electro-L.
Imagine if you will, being one of the lucky few chosen to make a one-way manned mission to the red planet. It will take a special kind of person, one with strength of character and ambition, and with a willingness to see the future in a new frontier.
Neptune is the and last planet of the solar system, as Pluto was categorized as a dwarf-planet a few years ago. Dark, cold and whipped by supersonic winds, Neptune is the furthest away from the Sun of the hydrogen and helium gas giants in our Solar Sy
Jupiter is the largest planet in the solar system. It has 67 moons which orbit around it. The spot in the lower left is the Great Red Spot, a giant high-pressure storm that has existed since at least the century.