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The Galilean moons of Jupiter. From left, they are Io, Europa, Ganymede, and Callisto.

This composite includes the four largest moons of Jupiter which are known as the Galilean satellites. The Galilean satellites were first seen by the Italian astronomer Galileo Galilei in 1610. Shown from left to right in order of increasing distance from Jupiter, Io is closest, followed by Europa, Ganymede, and Callisto. The order of these satellites from the planet Jupiter helps to explain some of the visible differences among the moons. Io is subject to the strongest tidal stresses from the massive planet. These stresses generate internal heating which is released at the surface and makes Io the most volcanically active body in our solar system. Europa appears to be strongly differentiated with a rock/iron core, an ice layer at its surface, and the potential for local or global zones of water between these layers. Tectonic resurfacing brightens terrain on the less active and partially differentiated moon Ganymede. Callisto, furthest from Jupiter, appears heavily cratered at low resolutions and shows no evidence of internal activity. North is to the top of this composite picture in which these satellites have all been scaled to a common factor of 10 kilometers (6 miles) per picture element. The Solid State Imaging (CCD) system aboard NASA's Galileo spacecraft acquired the Io and Ganymede images in June 1996, the Europa images in September 1996, and the Callisto images in November 1997. Launched in October 1989, the spacecraft's mission is to conduct detailed studies of the giant planet, its largest moons and the Jovian magnetic environment. The Jet Propulsion Laboratory, Pasadena, CA, manages the mission for NASA's Office of Space Science, Washington, DC.
Vir PIA01299
Avtor Image courtesy NASA/JPL-Caltech.
To sliko ali ta video je katalogiziral Jet Propulsion Laboratory Nacionalne uprave za aeronavtiko in vesolje (NASA) Združenih držav Amerike pod oznako fotografije: PIA01299.

Ta predloga ne označuje avtorskopravnega stanja dela. Ob njej mora stati tudi običajna oznaka avtorskopravnega stanja gradiva. Glejte Commons:Navedba licence.
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Cropped images of individual moons are:


Public domain Ta datoteka je v javni domeni, ker jo je izdelala izključno NASA. Avtorskopravna politika NASE pravi, da »Gradivo NASE ni zaščiteno z avtorskimi pravicami, razen če je rečeno drugače.« (glej Template:PD-USGov, stran z avtorskopravno politiko NASE ali Politiko uporabe slik JPL.)
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Datum in časSličicaVelikostUporabnikKomentar
trenutno04:04, 20. avgust 2018Sličica za različico z datumom 04:04, 20. avgust 20181.830 × 600 (610 KB)PlanetUserConverted from TIFF (610 KB)
05:56, 28. september 2011Sličica za različico z datumom 05:56, 28. september 20111.830 × 600 (556 KB)CraigboyCropped
21:54, 4. junij 2005Sličica za različico z datumom 21:54, 4. junij 20051.870 × 635 (576 KB)Dbenbennconverted from TIF at 100% quality
01:08, 9. april 2005Sličica za različico z datumom 01:08, 9. april 20051.870 × 635 (153 KB)BricktopNASA image
04:15, 21. januar 2005Sličica za različico z datumom 04:15, 21. januar 2005990 × 337 (52 KB)KristagaFrom en.wiki (NASA image) http://upload.wikimedia.org/wikipedia/en/6/62/Galilean_satellites.jpg

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