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Neptune
from Voyager 2
-
Jupiter,
Saturn, Uranus, Neptune,
Pluto
-
Neptune
more dense
-
Has
internal heat source
-
may
still be contracting from formation
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upper
atmosphere temperature 55 K
-
30
degree tilt of rotational axis
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84%
hydrogen, 14% helium, 2% methane (same as Uranus)
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No
water, no ammonia
-
what
color is Neptune?
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Has
clouds, storms
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clouds
may be frozen methane
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great
dark spot in southern hemisphere
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there
in 1989, gone in 1994
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new
storm in northern hemisphere in 1995\
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Has
some belts and zones
Neptune,
cloud close up
Belts
and Zones in Neptune (data from Larry Sromovsky of UW)
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