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Aurorae on Ganymede—auroral belt shifting may indicate a subsurface saline ocean. The permanent magnetic moment carves a part of space around Ganymede, creating a tiny magnetosphere embedded inside that of Jupiter; it is the only moon in the Solar System known to possess the feature. [95] Its diameter is 4–5 Ganymede radii. [96]
The magnetosphere of Jupiter is the cavity created in the solar wind by Jupiter's magnetic field.Extending up to seven million kilometers in the Sun's direction and almost to the orbit of Saturn in the opposite direction, Jupiter's magnetosphere is the largest and most powerful of any planetary magnetosphere in the Solar System, and by volume the largest known continuous structure in the Solar ...
The largest, Ganymede, is the largest moon in the Solar System and surpasses the planet Mercury in size (though not mass). Callisto is only slightly smaller than Mercury in size; the smaller ones, Io and Europa, are about the size of the Moon. The three inner moons — Io, Europa, and Ganymede — are in a 4:2:1 orbital resonance with
Geologic Map of Ganymede (February 11, 2014). This is a list of named geological features, except craters, on Ganymede , a moon of Jupiter . The list is complete as of August 2022.
Bright auroral spots within Jupiter's northern aurorae, contributed by the Galilean moons. Due to their close nature and long, shared histories, regular moons can have a significant influence on their primary. A familiar example of this are the ocean tides raised by the Moon on the Earth. Just as Earth raises tidal bulges on the Moon which ...
Image of Jupiter's northern aurorae, showing the main auroral oval, the polar emissions, and the spots generated by the interaction with Jupiter's natural satellites. Complex magnetic interactions have been observed in satellite systems. Most notably, the interaction of Jupiter's strong magnetic field with those of Ganymede and Io.
Avoid the airport with P&O Cruises on a 12-night sailing aboard Aurora out of Southampton. You can experience the beauty of the Norwegian fjords by day and try to spot the northern lights at night.
The first aurora beyond the Solar System is reported, on a brown dwarf 18 light years from Earth. [323] Astronomers report the discovery of HD 219134 b, a rocky exoplanet, due to its size of 1.6 Earth and density of 6 g/cm 3, that is the closest such exoplanet to Earth, at 21.25 light-years away. [324] [325]