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(61) The glass in the regolith owes its origin to impacts of cometary and asteroidal material with the lunar surface.

(62) Hardly any lunar rocks are younger than three billion years.

(63) The month began when the new lunar crescent was for the first time visible again after sunset.

(64) This would certainly take the edge off the impending Apollo lunar landing.

(65) Despite being obviously different in weight they struck the lunar surface together.

(66) Figure 6.3 is about the best that can be done with the lunar data at present.

(67) From the start there were communications difficulties between ground control and the lunar module.

(67) Wish you can benefit from sentencedict.com and make progress everyday!

(68) Then, with a single powerful engine burn, the spacecraft can decelerate to a soft landing on the lunar surface.

(69) When astronomers could build a large enough telescope they would see the lunar inhabitants going about their daily lives.

(70) You can also plot comets and minor planets as well as predict solar and lunar eclipses.

(71) The creation of these lunar ephemerides turned out to be the hardest part of the problem.

(72) But if the principal base of lunar operations is in the equatorial region, the attractiveness of polar ice is greatly diminished.

(73) Sense organs for lunar and planetary influences, for atmospheric pressure and cosmic rays are as yet purely hypothetical. 2.

(74) Maskelyne took up, then embraced, then came to personify the lunar distance method.

(75) For these reasons, many engineers and mission planners have favored the use of nuclear power for the lunar base.

(76) The basis of the Babylonian calendar seems always to have been lunar.

(77) Any and all data regarding lunar orbital motions might be grist for creating the tables navigators needed.

(78) Various rocks show evidence that the lunar material has been melted, squirted out from volcanoes, and crushed by meteorite impacts.

(79) On the Apollo 14 flight a fault developed in the lunar module.

(80) The lunar surface is also depleted in moderately volatile substances, and the same is probably true of Mercury.

(81) None the less, it is good to keep in mind that very few geochemists expect water to be found in lunar rocks.

(82) In other respects, the lunar poles are not an attractive site for the lunar base.

(83) This would substantially defray the cost of operating a lunar base.

(84) Most of the near side of the Moon is bright, rough, high terrain, called the lunar highlands.

(85) Forty-five minutes later, the Aries-1B lunar carrier pulled away from the Station.

(86) For two weeks at a time, each lunar power station is out of service.

(87) There has been no mention of any way to profit from the use of lunar material.

(88) The pun fits all sorts of natural and unnatural phenomena, from lunar cycles to a nostalgic yearning to see Elvis again.

(89) Another uses hydrofluoric acid to release oxygen from unprocessed lunar regolith.

(90) However, the recent lunar eclipse and Mercury in retrograde motion signify the financial position is much too uncertain.