After a year circling the moon with a diverse array of instruments, LRO has revealed detailed images far different from the ones Brown University geology professor Jim Head used when he worked in the Apollo program, (1)_________________________________. Brown says the lunar maps back then were based on images with lower resolution and limited viewing angles, which meant that deciding where astronauts could land involved a fair amount of guesswork.
"But what we have here with the LOLA instrument is in fact the ability to create topographic maps that actually look like images. (2)_________________________________which we've combined together to create these global topographic[ 地质的] maps and they give us an even portrayal of the topography, (3)_________________________________."
1.which sent the first man to move in 1968.
2.so we add over two and a half billion shots of laser data.
3.largely compose the impact creaters of all surfaces of the moon.
发表于 2012-3-22 14:09
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发表于 2012-3-23 13:47
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