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Ganymede's magnetic field is probably created by convection within its core, and influenced by tidal forces from Jupiter's far greater magnetic field. [23] Ganymede has a thin oxygen atmosphere that includes O, O 2, and possibly O 3 . [17] Atomic hydrogen is a minor atmospheric constituent.
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
The book describes Ganymede as having about 1 ⁄ 3 Earth gravity but in reality it is only about 1 ⁄ 7. Heinlein also postulated that the surface of Ganymede was volcanic rock like the Moon. Subsequent discoveries have shown that Ganymede's crust is actually almost 90 percent ice or frost, covering a subsurface ocean.
The almanac's 2024-25 Winter Outlook predicts cool temperatures and isolated showers from Dec. 19-Jan. 1, with showers from Dec. 24–27 and blustery cold winds from Dec. 28–31. The Almanac ...
It's officially December, and it's only going to get colder this week, according to the National Weather Service in Indianapolis. Here's what we know. December is here, and so are the cold ...
In the Solar System it is the third-largest moon after Ganymede and Saturn's largest moon Titan, and nearly as large as the smallest planet Mercury. Callisto is, with a diameter of 4,821 km , roughly a third larger than Earth's Moon and orbits Jupiter on average at a distance of 1,883,000 km , which is about five times further out than the Moon ...
Yes we know the calendar still says it's fall, but if you're already sick of winter's cold, there is some good news on the way: The bitter Arctic blast that's overspread much of the central ...
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.