The Galilean satellites. Although approximate diameters and spectrophotometric characteristics of the four largest satellites of Jupiter had been determined from ground-based observations, ...
The Discovery of the Galilean Satellites
Courtesy of: NASA/JPL
Probably the most significent contribution that Galileo Galilei made to science was the discovery of the four satellites around Jupiter that are now named in his honor.
Galilean satellites The four brightest and largest moons of Jupiter (Io, Europa, Ganymede, Callisto), named after Galileo Galilei, the 17th century astronomer who first observed them.
Galilean satellites The four brightest satellites of Jupiter; Io, Europa, Ganymede, and Callisto, named after their discoverer, Galileo Galilei (also known as the Jovian satellites).
Galilean satellites -- The four large satellites of Jupiter so named because Galileo discovered them when he turned his telescope toward Jupiter: Io, Europa, Ganymede, and Callisto.
Galilean Satellites
The four largest moons of Jupiter, named after their discoverer Galileo.
Gauss ...
Galilean satellites: The four largest satellites of Jupiter, named after their discoverer, Galileo.
gamma-ray burster: An object that produces a sudden burst of gamma rays; thought to be associated with neutron stars and black holes.
Galilean Satellites
These are the four Galilean satellites. They are named so because they were the only four moons that Galileo was able to see. They are also the largest of Jupiter's moons.
Galilean satellites. Jupiter's best known moons are the four large planet-sized bodies — IO, EUROPA, GANYMEDE, CALLISTO, and AMALTHEA.
The Galilean satellites (Jupiter's four largest moons) to the same scale. Our Moon is also shown for reference.
One of the Galilean satellites of Jupiter 3600 km in diameter. Period 3.55 days, e = 0.00, i = 0°.01, mean density 3.07 g cm-3. [H76]
Europium
EUV
Extreme UltraViolet [LLM96]
Evection ...
Like all the Galilean satellites, Europa is tidally locked to Jupiter, with one hemisphere of the satellite constantly facing the planet.
Galilean satellites (NASA Thesaurus) The four largest and brightest satellites of Jupiter (Io, Europa, Ganymede, and Callisto).
Unlike the other Galilean satellites, Io has little or no water. This is probably because Jupiter was hot enough early in the evolution of the solar system to drive off the volatile elements in the vicinity of Io but not so hot to do so farther out.
Characterize the morphology, geology, and physical state of the Galilean satellites.
Investigate the composition and distribution of surface minerals on the Galilean satellites.
In January 1610 Galileo used one of his telescopes to discover Jupiter's four largest moons (which we often call "the Galilean satellites"). However, a fellow named Simon Marius may have seen them slightly earlier.
Amalthea is the largest of Jupiter's non-Galilean satellites and one of four moons that circle around Jupiter inside the orbit of Io. Amalthea is potato-shaped like the Martian moon Phobos but 10 times bigger.
The physical characteristics of the Galilean satellites vary with increasing distance from the planet. The one closest to the planet is Io, which has the highest density of the four. It is composed mainly of rock.
The Galilean satellites are all named after objects of mythological Jupiter's wide-ranging fancies. Callisto was a beautiful maiden who enticed Jupiter, thereby invoking the wrath of Juno, Jupiter's wife. She turned Callisto into a bear.
The four largest are called the Galilean satellites, since it was once believed that Galileo Galilei discovered them; actually the German scientist Simon Marius discovered them at the same time.
The four largest—Io, Europa, Ganymede, and Callisto—were discovered by Galileo in 1610, shortly after he invented the telescope, and are known as the Galilean satellites.
In astronomy, the natural satellites or "moons" of the planets are traditionally designated by capital Roman numerals, at first by order from the center of the planet, as the four Galilean satellites of Jupiter are numbered, ...
Jupiter has a large number of satellites, including the four Galilean satellites, Io, Europa, Ganymede and Callisto. Io is famous for its active volcanic activity, which emits sulphuric compounds, and has a geologically young surface.
The Galileoscope project offers low cost 50 millimetre diameter telescopes that allow budding astronomers to view delights such as lunar craters and mountains, the Galilean satellites, the phases of Venus, Saturn's rings, ...
Until the discovery of the Galilean satellites in 1610, however, there was no opportunity for referring to such objects as a class.
It is one of the Galilean satellites, so named because saw them when he first turned his telescope toward Jupiter. Callisto shows a surface saturated with impact scars attesting to the great age of this icy world.
All four "Galilean satellites" of Jupiter are synchronous: volcanic Io, Europa, Ganymede and Callisto, all discovered by Galileo.
mutual occultations of Galilean satellites of Jupiter). The most frequent and readily observed type of occultation, termed a lunar occultation, occurs when the Moon passes in front of a star.
Jupiter's four largest moons (Io, Europa, Ganymede and Callisto) are known as the Galilean satellites because they were discovered by Galileo Galilei in 1610. Image Credit: NASA
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The remaining moons are very much smaller and less well studied than the four Galilean satellites.
Major Satellites of Jupiter
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The "stars" that Galileo saw are the four largest moons of Jupiter, now known as the Galilean satellites in honor of their discoverer. The satellites are named Io, Europa, Ganymede, and Callisto after four of Jupiter's lovers in Greek mythology.
Many tiny new satellites have been discovered since space probes have been sent to explore the solar system. The Voyager project was particularly successful. The Galilean satellites of Jupiter are marked with an asterisk * and are easily seen ...
However, in the case of the "outer" Jovian satellites (such as Pasiphae), the perturbations by Saturn and even the Galilean satellites dominate those due to Jupiter's gravitational harmonics.
Some of the most intriguing science targets are: Pluto and the Kuiper Belt; Neptune and its frigid moon Triton; Saturn and its moons Titan and Enceladus; Jupiter and its Galilean satellites - especially Europa - and comets that make long sweeps ...
(Later astronomers overruled Galileo's naming of these objects, changing his Medicean stars to Galilean satellites.) The demonstration that a planet had smaller planets orbiting it was problematic for the orderly, ...
This effect may be due to magnetospheric bombardment acting preferentially on the trailing hemisphere and impact gardening on the leading hemisphere. Of the Galilean satellites, Europa displays this effect most prominently, ...
jovian satellites jupiter moon jupiter's moon jovian moon jupiter satellite jupiter's satellite jovian satellite ring-moon ring-moons ringmoon ringmoons moom mooms Metis Adrastea Amalthea Thebe Io Europa Ganymede Callisto galilean satellites galilean ...
For the first time, objects had been observed orbiting another planet, thus weakening the hold of the Ptolemaic model. Today these four moons are known as the Galilean satellites; Io, Europa, Ganymede and Callisto.
It did not take long for the geocentric (Earth centered) view of the universe to fall in disfavor. To this day, these four moons, lo, Europa, Ganymede and Callisto are known as the Galilean satellites in honor of this brave, careful researcher.
 See also: Satellite, Jupiter, Planet, Orbit, Earth
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