=========+========+==========+==========+========+============+==========+==========+============+=========== | Mean | | |Density | Surface |Velocity |Reflecting| Period |Inclination Name |Diameter| Mass | Volume |Relative| Gravity |of Escape | Power | of | of | in +----------+----------+to that | (Relative |(Miles per| in | Axial | Equator | Miles | Relative to Earth's |of Water| to Earth's)| Second) | Per Cent | Rotation | to Orbit ---------+--------+----------+----------+--------+------------+----------+----------+------------+----------- Sun | 864,392| 329,390 | 1,300,000| 1.40 | 27.64 | 383 | ..... |25 d. 8 h.| 7° 15' Moon | 2,160| .012 | .02 | 3.34 | 0.16 | 1.5 | 7 |27 d. 7.7 h.| 6 41 Mercury | 3,009| .045 | .06 | 4.48? | 0.31? | 2.2 | 7 |88 d. ? | ? Venus | 7,575| .807 | .92 | 4.85? | 0.85 | 6.6 | 59 | ? | ? Earth | 7,918| 1.000 | 1.00 | 5.53 | 1.00 | 7 | 44 |23 h. 56 m. | 23 27 Mars | 4,216| .106 | .15 | 3.58 | 0.35 | 1.5 | 15 |24 37 | 23 59 Asteroids|5-485[2]|very small|very small| 3.3 |.0008 to .04|.33 to .01| 7 | ..... | ..... Jupiter | 88,392| 314.50 | 1309 | 1.25 | 2.52 | 37 | 56 | 9 55± | 3° Saturn | 74,163| 94.07 | 760 | 0.63 | 1.07 | 22 | 63 |10 14± | 27° Uranus | 30,878| 14.40 | 65 | 1.44 | 0.99 | 13 | 63 |10 45± | ? Neptune | 32,932| 16.72 | 85 | 1.09 | 0.87 | 14 | 73 | ? | ? =========+========+==========+==========+========+============+==========+==========+============+=========== FOOTNOTE: [2] Extreme values. TABLE II THE SATELLITES OF THE SOLAR SYSTEM