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(91) Schemes for extracting oxygen from lunar rocks usually feature melting or chemically destroying the principal minerals in the rocks and regolith.

(92) What if you, too, dream of teeing off on the lunar surface?

(93) The lunar regolith is found covering the whole of the Moon's surface, aside from steep crater and valley walls.

(94) Somewhat softened by wind erosion, the surface none the less looked more like the lunar highlands than like anything on Earth.

(95) These constraints made the hatch difficult to get out of in full spacesuits with lunar backpacks.

(96) Unmanned probes were being sent to study the lunar surface to prepare for Apollo to follow.

(97) If ice is available at the site of the lunar base,(sentencedict.com/lunar.html) then the situation is dramatically different.

(98) Like a new lunar base, a baby must first master at least the arts of breathing and eating.

(99) They differ from corresponding lunar craters by having no central peaks and by having rather smooth rims.

(100) Such a transportation system will exert a constant demand for fuel both at the space station and on the lunar surface.

(101) Further, no nation on Earth presently has the ability to launch manned lunar missions.

(102) But the lunar gravity field was then so poorly mapped that the chances of achieving a successful preprogrammed landing were very small.

(103) On the early lunar landing missions, the plan called for the astronauts to be transferred straight into an isolation chamber.

(104) The return trip from the lunar surface to the space station also consists of two parts.

(105) They were principally concerned with the Coniunctio Solis et Lunae, the marriage of the solar and lunar principles.

(106) Grumman had installed them on the lunar module assuming that the astronauts would wish to use them.

(107) This marked the beginning of a new groundswell in activity directed at institutionalizing the lunar distance method.

(108) The lunar samples show some striking differences from Earth rocks.

(109) After burial, the first lunar base module is now ready for occupancy.

(110) As noted earlier, oxygen can in principle be recycled efficiently within a lunar base.

(111) Agglutinates greatly complicate the business of extracting useful materials from mature lunar regolith.

(112) In general, lunar rocks differ from terrestrial rocks in that the Moon contains much lower concentrations of easily vaporized elements.

(113) I would recommend them only for the casual observer who wants little apart from views of lunar craters.

(114) But the pictures sent by Mariner 4 showed a starkly lunar landscape.

(115) They therefore are also very efficient at releasing all the trapped solar-wind gases in the lunar material.

(116) Apollo 8 was scheduled to be the first Earth-orbital test of the lunar module.

(117) Such migration need not disturb the uniformity of the dust type across the lunar surface.

(118) About three days later the command, service and lunar module combination arrived at the Moon.

(119) In only one case was a sample obtained from a large lump of rock, these being scarce on the lunar surface.

(120) An oversimplified but instructive point can be made by considering the fate of carbohydrates transported to the lunar base from Earth.