Blue Planet                     Earth
Earth"s twin                    Venus
Biggest satellite               Ganymede
Smallest satellite              Deimos
Brightest planet                Venus
Biggest dwarf planet            Eris
Smallest dwarf planet           Ceres
Morning & Evening Star          Venus
                                               PLANETS PROFILE
  Planet with       Distance from     Radius                       Surface area   Length      Satellite
                                                      Mass
    Symbol             Sun (km)        (km)                            (km2)      of day
                                               3.3022×1023 kg                    58d 15h
                      57,910,000       2,440                        74,797,000            No Satellite
Mercury                                        0.055 Earths                      30m
                                               4.8676×1024 kg                    116d 18h
Venus                108,200,000       6,052                        460,234,317           No Satellite
                                               0.815 Earths                      0m
                                                                                          Moon is the
Earth                149,600,000       6,371   5.97219×1024 kg      510,072,000  24h 0m
                                                                                          only Satellite
                                                                                          2 Satellites –
                                               6.4185×1023 kg                    1d 0h
Mars                 227,900,000       3,390                        144,798,500           Phobos &
                                               0.107 Earths                      40m
                                                                                          Deimos
                                               1.8986×1027 kg
Jupiter              778,500,000      69,911                      61,418,738,571 9h 56m   63 Satellites
                                               317.8 Earths
                                               5.6846×1026 kg
Saturn              1,433,000,000     58,232                      42,700,000,000 10h 39m  62 Satellites
                                               95.152 Earths
                                               8.6849x1025 kg
                    2,877,000,000     25,362                       8,083,079,690 17h 14m  27 Satellites
Uranus                                         14.536 Earths
                                               1.0243×1026 kg
Neptune             4,503,000,000     24,622                       7,618,272,763 16h 6m   13 Satellites
                                               17.147 Earths
Why is Pluto no longer a planet?
    Pluto was first discovered in 1930 by Clyde W.
    The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf
     planet because it did not meet the three criteria the IAU uses to define a full-sized planet.
    The three criteria of the IAU for a full-sized planet are:
       1. It is in orbit around the Sun.
       2. It has sufficient mass to assume hydrostatic equilibrium (a nearly round shape).
       3. It has "cleared the neighborhood" around its orbit.
    Essentially Pluto meets all the criteria except one - it “has not cleared its neighboring region
     of other objects.”
    In August 2006 the International Astronomical Union (IAU) downgraded the status of Pluto
     to that of "dwarf planet."
THE MOON
    The Moon (or Luna) is the Earth’s only natural satellite.
    It is the fifth largest moon in the Solar System.
                                                       661