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Atmosphere of the Moon. The thin lunar atmosphere is visible on the Moon's surface at sunrise and sunset with the lunar horizon glow [1] and lunar twilight rays, like Earth's crepuscular rays. This Apollo 17 sketch depicts the glow and rays [2] among the general zodiacal light [3][4]. The atmosphere of the Moon is a very sparse layer of gases ...
Internal structure of the Moon. Moon's internal structure. Olivine basalt collected by Apollo 15. Thermal state of the Moon at age 100 Ma. [1] Having a mean density of 3,346.4 kg/m 3, [2] the Moon is a differentiated body, being composed of a geochemically distinct crust, mantle, and planetary core. This structure is believed to have resulted ...
The Moon is Earth 's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have synchronized the Moon's orbital period (lunar month) with its rotation period (lunar day) at 29.5 Earth days, causing the same side of the Moon to always ...
The NASA astronauts who became the first people to land on the moon's surface in the 1960s and 1970s also discovered a previously unknown lunar characteristic - it has an atmosphere, though quite ...
Earth is getting a second moon, ... satellite is like a customer buying goods inside a ... an orbit around the sun — but not that far from Earth. On January 8, 2025, according to NASA, it will ...
Artemis I. Artemis I, formerly Exploration Mission-1 (EM-1), [9] was an uncrewed Moon-orbiting mission. As the first major spaceflight of NASA 's Artemis program, Artemis I marked the agency's return to lunar exploration after the conclusion of the Apollo program five decades earlier. It was the first integrated flight test of the Orion ...
Unlike the Earth, the Moon lacks a protective atmosphere and magnetic field, leaving its surface exposed to intense solar radiation and cosmic rays. Radiation poses significant health risks to ...
The geology of the Moon (sometimes called selenology, although the latter term can refer more generally to "lunar science") is quite different from that of Earth. The Moon lacks a true atmosphere, and the absence of free oxygen and water eliminates erosion due to weather. Instead, the surface is eroded much more slowly through the bombardment ...