Range : 6 million kilometers (3.7 million miles) Central Longitude 120 degrees west, North is up. and 3rd from the planet. Photo taken after midnight Ganymede is slightly larger than Mercury but much less dense (twice the density of water). Its surface brightness is 4 times of Earth's Moon. Mare regions (dark features) are like the Moon's but have twice the brightness, and believed to be unlikely of rock or lava as the Moon's are. It's north pole seems covered with brighter material and may be water frost. Scattered brighter spots may be related to impact craters or source of fresh ice. ARC-1979-A79-7019
Summary
Range : 6 million kilometers (3.7 million miles) Central Longitude 120 degrees west, North is up. and 3rd from the planet. Photo taken after midnight Ganymede is slightly larger than Mercury but much less dense (twice the density of water). Its surface brightness is 4 times of Earth's Moon. Mare regions (dark features) are like the Moon's but have twice the brightness, and believed to be unlikely of rock or lava as the Moon's are. It's north pole seems covered with brighter material and may be water frost. Scattered brighter spots may be related to impact craters or source of fresh ice.
Nothing Found.
Tags
arc
jpl
ames research center
million
kilometers
million kilometers
million miles
longitude
central longitude
degrees
degrees west
planet
midnight
ganymede
midnight ganymede
mercury
density
water
surface
brightness
surface brightness
times
earth
moon
mare
mare regions
rock
lava
pole
frost
water frost
spots
impact
craters
impact craters
source
ice
mercury project
high resolution
range
photo
features
earth from space
nasa
Date
27/02/1979
Source
NASA
Link
Copyright info
Public Domain Dedication (CC0)