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As the Moon's fine surface layer, lunar regolith is picked up by even weak natural phenomena active at the Moon's surface, allowing it to be part of the Moon's scant atmosphere. It is easily disturbed and poses a significant hazard to exposed equipment and human health.
The Moon's color depends on the light the Moon reflects, which in turn depends on the Moon's surface and its features, having for example large darker regions. In general, the lunar surface reflects a brown-tinged gray light. [213] At times, the Moon can appear red or blue.
The maria cover about 35% of the surface. The contrast between the less reflective dark gray maria and the more reflective gray/white lunar highlands is easily visible without optical aid. Under good viewing conditions, those with keen eyesight may also be able to see some of the following features: Bright region around Copernicus; Mare Nectaris
Inside a giant sphere, the engineers pored over their equipment. Before them stood a silvery metal contraption swathed in colourful wires – a box that they hope will one day make oxygen on the moon.
They were not large, but gave the Moon a look strikingly like that of a horned owl or the head of an English bull terrier. [22] On February 19, 1885, Gray saw a small crater near the larger crater Hercules glow dull red "with vivid contrast". [23] On February 21, 1885, Knopp observed red patches in crater Cassini. [23]
[137] [138] The last attempt to define acceptable detailed rules for exploitation, ended in June 2018, after S. Neil Hosenball, who was the NASA General Counsel and chief US negotiator for the Moon Treaty, decided that negotiation of the mining rules in the Moon Treaty should be delayed until the feasibility of exploitation of lunar resources ...
Moon almost invisible, especially at mid-totality. L = 1: Dark eclipse, gray or brownish in coloration. Details distinguishable only with difficulty. L = 2: Deep red or rust-colored eclipse. Very dark central shadow, while outer edge of umbra is relatively bright. L = 3: Brick-red eclipse. Umbral shadow usually has a bright or yellow rim.
Triton was the first Neptunian moon to be discovered, on October 10, 1846, by English astronomer William Lassell. The 1989 flyby of Triton by the Voyager 2 spacecraft remains the only up-close visit to the moon as of 2025. As the probe was only able to study about 40% of the moon's surface, multiple concept missions have been developed to ...