Photos of the Sun

The planet Pluto. Uranus, Neptune and Pluto

The planet Pluto. Uranus, Neptune and Pluto

Until in 2015 the New Horizons ship approached, Pluto was the only planet (now, "dwarf planet") that had not been visited by a spaceship, although an increasing amount of information about this peculiar "ex" was already being obtained "planet. The uniqueness of Pluto's orbit, its rotational relationship with its Charon satellite, its axis of rotation and the variations of light make the planet have a certain appeal.

While it was considered a planet, Pluto was further from the Sun than any of the others solar system planets. However, due to the eccentricity of its orbit, Pluto is closer than Neptune during 20 of the 249 Earth years that its journey around the Sun lasts.

There is, however, no possibility of collision, since Pluto's orbit tilts more than 17.2 ° with respect to the plane of the ecliptic and never actually crosses the path of Neptune.

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Triton, moon of NeptunePluto surface
Album: Photos of the Solar System Gallery: Uranus, Neptune and Pluto