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Amiga Collections: Topik
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Topik - Disk 39 - Educational (19xx)(Topik Public Domain)(PD)[WB].zip
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FASTFACTS
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SOLAR-SYSTEM
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NEPTUNE
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1991-03-09
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31 lines
NEPTUNE
DISTANCE FROM THE SUN:
MEAN 2,795,000,000 mi. (4,498,100,000 km.)
SHORTEST 2,771,000,000 mi. (4,459,500,000 km.)
GREATEST 2,819,000,000 mi. (4,536,700,000 km.)
CLOSEST APPROACH TO EARTH 2,678,000,000 mi. (4,309,800,000 km.)
LENGTH OF YEAR (EARTH-DAYS) 60,188
AVERAGE ORBITAL SPEED 3 mi. per sec. (5 km. per sec.)
DIAMETER AT EQUATOR 30,760 mi. (49,500 km.)
ROATION PERIOD 15 hrs. 40 min.
TILT OF AXIS (DEGREE) 29
AVERAGE TEMPERATURE Unknown; probably lower than -280°F.
(-173° C.)
ATMOSPHERE:
PRESSURE (?)
(?)
GASES HYDROGEN, HELIUM, METHANE, AMMONIA
MASS (EARTH=1) 17.3
DENSITY (WATER=1) 2.2
GRAVITY (EARTH=1) 1.43
NUMBER OF SATELLITES 2
NEPTUNE'S SATELLITES
MEAN SIDEREAL VISUAL
NAME DISTANCE PERIOD MAGNITUDE RADIUS DISCOVERY
10³ mi. days hr min (miles)
TRITON 220 5 21 03R 13.6 Var. 1,150 Lassell 1846
NEREID 3,460 359 10 18.7 100 Kuiper 1949