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Gravity passes through matter. In addition to surface mass, a high-resolution gravity field gives a blurred, but useful, look below the surface. Analyses of the GRAIL data have produced a series of scientific results for the Moon. The resolution of the gravity field has improved by a large amount over pre-GRAIL results.
Gravity acceleration at the surface of the Moon in m/s 2. Near side on the left, far side on the right. Map from Lunar Gravity Model 2011 Archived 2013-01-14 at the Wayback Machine. The missions with accurate Doppler tracking that have been used for deriving gravity fields are in the accompanying table.
The new map, created by the Gravity Recovery and Interior Laboratory (GRAIL) mission, is allowing scientists to learn about the moon's internal structure and composition in unprecedented detail. Data from the two washing machine-sized spacecraft also will provide a better understanding of how Earth and other rocky planets in the solar system ...
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 at 29.5 Earth days, causing the same side of the Moon to always face Earth.
Topography (top) and corresponding gravity (bottom) signal of Mare Smythii on the Moon containing a significant mascon. Map of the Moon's gravity anomalies. In astronomy, astrophysics and geophysics, a mass concentration (or mascon) is a region of a planet's or moon's crust that contains a large positive gravity anomaly.
Now that NASA is planning new missions to the Moon with project Artemis, it needs the most detailed maps of our satellite ever produced. To that end, scientists from NASA, the United States ...
The Doppler Gravity Experiment (DGE) was the first polar, low-altitude mapping of the lunar gravity field. The Clementine mission had previously produced a relatively low-resolution map, but the Prospector DGE obtained data approximately five times as detailed: the "first truly operational gravity map of the Moon". [14]
Io (/ ˈ aɪ. oʊ /), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter.Slightly larger than Earth's moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, the strongest surface gravity of any moon, and the lowest amount of water by atomic ratio of any known astronomical object in the Solar System.