lunar mountain

lunar mountain

[′lü·nər ′mau̇nt·ən]
(astronomy)
A mountain on the moon.
Mentioned in ?
References in classic literature ?
observations have been from time to time carried on with more or less correctness, until in the present day the altitudes of the lunar mountains have been determined with exactitude.
A number of craters and lunar mountain ranges can be seen with a simple pair of binoculars, held as steady as possible.
Ebb and Flow deliberately plunged into a lunar mountain in December after mapping the moon's gravity field in unprecedented detail.
A pair of Nasa moon-mapping probes, Ebb and Flow, the two spacecraft comprising Nasa's Gravity Recovery and Interior Laboratory (GRAIL) mission, smashed themselves into a lunar mountain on Monday, ending a year-long mission that is shedding light on how the solar system formed.
Indeed, lunar mountain ranges differ from their terrestrial counterparts in that most of the former are the rims of impact basins, while the latter are built up through tectonic activity.
Instead of taking a pointlike star as their guide, they opted to use an extended object--a sunlit lunar mountain.
Because lunar mountain ranges are named for terrestrial chains, I informally call them the Wasatch Mountains, named after a range in Utah.
Mission controllers made a final trajectory tweak on September 1st to avoid clipping a lunar mountain one orbit too early.
On this occasion the astronomers used a sunlit lunar mountain peak just beyond the terminator as their "guide star" during the 0.
For instance, in his description of the lunar mountain Piton (S&T: October 1965, page 251), he noted, "The slope angles of the mountain sides are uncertain, but may be only about 12[degrees] to 15[degrees].
These are lunar mountains and valleys seen in profile along the Moon's limb.
LRO was only about 100 miles (160 kilometers) from the lunar surface at the time of the impact, and variations in gravity from massive features like lunar mountains tugged on the spacecraft, altering its orbit.