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  1. EARTH
  2. DISTANCE FROM THE SUN:
  3.                 MEAN                92,950,000 mi.   (149,590,000 km.)
  4. SHORTEST                            91,400,000 mi.   (147,100,000 km.)
  5. GREATEST                            94,500,000 mi.   (152,100,000 km.)
  6. CLOSEST APPROACH TO EARTH           ---------------------------------
  7.  
  8. LENGTH OF YEAR (EARTH-DAYS)         365
  9. AVERAGE ORBITAL SPEED               19 mi. per sec.  (31 km. per sec.)
  10. DIAMETER AT EQUATOR                 7,926 mi.        (12,756 km.)
  11. ROATION PERIOD                      23 hrs. 56 min.
  12. TILT OF AXIS (DEGREE)               23 1/2
  13. AVERAGE TEMPERATURE                 57°F.            (14° C.)
  14. ATMOSPHERE:
  15. PRESSURE                            14.7 lbs. per sq. in.
  16.                                     (1.03 kg per cm2)
  17. GASES                               NITROGEN, OXYGEN, CARBON DIOXIDE, WATER
  18.                                     VAPOR
  19. MASS (EARTH=1)                      1
  20. DENSITY (WATER=1)                   5.5
  21. GRAVITY (EARTH=1)                   1
  22. NUMBER OF SATELLITES                1
  23.  
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