The rocket booster segments that will help power NASA’s first Artemis flight test mission around the Moon arrived at KSC. Technicians recently finished applying more than 180 blocks of ablative material to the heat shield for the Orion spacecraft. Its long axis is aligned towards Jupiter, this being the lowest energy configuration. Adrastea is a small moon of the planet Jupiter that orbits the planet in less time than it rotates on its axis. It is easy for the impact ejecta to be lost from these satellites into space. This is due to the satellites' low density and their surfaces lying close to the edge of their Roche spheres. Amalthea's density implies that the moon is composed of water ice with a porosity of 10-15%, and Adrastea may be similar. This is due to the satellites' low density and their surfaces lying close to the edge of their Roche spheres. The orbit has very small eccentricity and inclination—around 0.0015 and 0.03°, respectively. At this distance, Adrastea's orbit will eventually decay and it will fall into the planet. It orbits at the edge of Jupiter's Main Ring and is thought to be the main contributor of material to the Rings of Jupiter. If its density is similar to Amalthea's then its orbit would actually lie within the fluid Roche limit. Kristen Erickson It orbits at the edge of Jupiter's Main Ring and is thought to be the main contributor of material to the Rings of Jupiter. Adrastea is one of the few moons in the Solar System known to orbit its planet in less than the length of that planet's day. Astronomy Wiki is a FANDOM Lifestyle Community. Adrastea is one of only three moons in the Solar System known to orbit its planet in less than the length of that planet's day - the other two being Jupiter's innermost moon Metis, and Mars' moon Phobos. Cyclones at the north pole of Jupiter appear as swirls of striking colors in this extreme false color rendering of an image from NASA’s Juno mission. Adrasteia, também conhecida como Júpiter XV, é o segundo por distância, e o menor dos satélites de Júpiter do Grupo Amalteia.Ele foi descoberto com fotografias tiradas pela Voyager 2 em 1979, sendo o primeiro satélite natural a ser descoberto com imagens tiradas com uma sonda interplanetária, em vez de imagens por telescópios. Its density has been calculated at being 3. In Depth. Orbiting within Io's orbit, which is the innermost of the four largest moons of Jupiter (called the Galilean moons), are four smaller moons named Metis, Adrastea, Amalthea, and Thebe. Bill Dunford. [5] In 1983, Adrastea was officially named after the Greek nymph Adrastea, the daughter of Zeus and his lover Ananke. Despite observations made in the 1990s by the Galileo spacecraft, very little is known about the moon's physical characteristics other than its size and the fact that it is tidally locked to Jupiter. Soon after its discovery, two other of the inner moons of Jupiter (Thebe and Metis) were observed in the images taken a few months earlier by Voyager 1. Adrastea, also known as Jupiter XV, is the second by distance, and the smallest of the four inner moons of Jupiter. JunoCam: Science and Outreach Opportunities with Juno, https://en.wikipedia.org/w/index.php?title=Adrastea_(moon)&oldid=968113238, Creative Commons Attribution-ShareAlike License, This page was last edited on 17 July 2020, at 09:19. This makes it the smallest of the four inner moons. Infrared images from NASA's Juno spacecraft are providing the first glimpse of Ganymede's icy north pole. Researchers have designed an ambitious observing program that will conduct some of Webb's first scientific observations. Site Manager: However, because it is so small Adrastea is relatively immune to the effects of tidal forces. The Galileo spacecraft has revealed some surface features, including impact craters, hills and valleys. 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