For example, lunar regolith itself could be used as massive material to shield space stations or crewed spacecraft on long missions from solar flares, Van Allen radiation, and other kinds of cosmic radiation.
32.
The 150-micron filtered and dried stone dust is used because its properties are as close as they can get to lunar regolith ( a layer of loose soil and dust ) in terms of cohesion.
33.
The Project Apollo missions deployed passive aluminum collectors in an attempt to sample the solar wind, and lunar soil returned for study confirmed that the lunar regolith is enriched in atomic nuclei deposited from the solar wind.
34.
Much of the design study was concerned with a simple, flexible chemical system for processing lunar regolith, and the differences between the ratio of elements needed by the replicator, and the ratios available in regolith.
35.
Much of the design study was concerned with a simple, flexible chemical system for processing the ores, and the differences between the ratio of elements needed by the replicator, and the ratios available in lunar regolith.
36.
These dark-halo craters are cinder cone-shaped and are believed by some to be volcanic in origin, although others think they were caused by impacts that excavated darker mare material from underneath the lighter lunar regolith.
37.
Measurements of the thermal inertia of 115 Thyra give a value of around 75 m " 2 K " 1 s " 1 / 2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.
38.
Measurements of the thermal inertia of 277 Elvira give a value of around 190 m " 2 K " 1 s " 1 / 2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.
39.
Measurements of the thermal inertia of 32 Pomona give a value of around 20 120 m " 2 K " 1 s " 1 / 2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.
40.
Measurements of the thermal inertia of 306 Unitas give an estimate range from 100 to 260 m " 2 K " 1 s " 1 / 2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.
