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Explanation: Amalthea is Jupiter's fifth largest moon, much smaller than the four Galilean satellites Io, Europa, Ganymede, and Callisto. The orbit of Amalthea is inside of these moons, and with its long axis always pointing toward Jupiter. It's dark surface color is probably due to sulfur being expelled from Io. Amalthea is not massive enough for its internal gravity to make it spherical. Amalthea was discovered in 1892 by Edward Barnard.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Jupiter - Amalthea
Publications with words: Jupiter - Amalthea
See also:
- APOD: 2025 December 14 Á Juno Flyby of Ganymede and Jupiter
- APOD: 2025 May 25 Á Beneath Jupiter
- Painting with Jupiter
- APOD: 2025 April 2 Á Jupiter and Ring in Infrared from Webb
- APOD: 2025 March 9 Á Cyclones at Jupiters North Pole
- APOD: 2025 February 16 Á Perijove 11: Passing Jupiter
- Stereo Jupiter near Opposition