Astronomy Picture of the Day
Discover the cosmos! Each day we feature a different image or photograph
of our fascinating universe, along with a brief explanation written by a
November 3, 1995
Jupiter's Moon Amalthea
Copyright Calvin J. Hamilton
Jupiter's fifth largest moon, much smaller than
The orbit of
Amalthea is inside of these moons, and with its long axis always
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.
Tomorrow's picture: Neptune's Moon Proteus
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