[FPSPACE] Some very impressive imaging of Jupiter's moon from Earth
ljk4 at msn.com
Tue Jun 5 09:36:59 EDT 2007
MOONS OF JUPITER: Jupiter's moons are so big, their details are visible from
backyards on Earth.
Mike Salway of Central Coast, Australia, used a 12-inch Newtonian reflector
to take these pictures of Ganymede and Io on May 26th:
"To me, the surface markings are unmistakably real," says Salway. "In
moments of great seeing, especially with Ganymede which is bigger than the
planet Mercury, the features were seen in [individual video frames]."
"I believe the egg shape of Io is due to darkened polar regions. The camera
isn't sensitive enough to detect these dark regions against the black of
space. When Io transits Jupiter, however, you can see the dark poles against
the obviously bright planet."
This is a great week to observe Jupiter's moons, and Jupiter itself, because
the giant planet is at its closest to Earth for all of 2007. Stay tuned for
EXTRA: On May 11th, Salway recorded a fantastic movie of Jupiter and its
largest moons. Expand your browser and click here. (770 kb)
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