Astronomy Picture of the Day

The Shadow of Phobos

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#79778 by @ 18.09.2005 00:00 - nach oben -
The Shadow of Phobos


Hurtling through space above the Red Planet,

potato-shaped Phobos completes an orbit of Mars
in less than eight hours.

In fact, since its orbital period is shorter than
the planet's rotation period,

see Phobos rise in the west and set in the east -
horizon to horizon in about 5 1/2 hours.

These three images from the Mars Global Surveyor (MGS)

record the oval
shadow of Phobos racing over
western Xanthe Terra on August 26, 1999.

The area imaged is about 250 kilometers across and is seen
in panels from left to right as
red filter, blue filter, and combined color composite views
from the MGS wide-angle camera system.

The three dark spots most easily seen in the
red filter image are likely small fields of dark
sand dunes on crater floors.

in the shadow of Phobos
, you would see the
Martian version of a solar eclipse!

Credit & Copyright
#97815 by @ 12.01.2007 19:05 - nach oben -
wa shadow of phobos? da isch ganz klar ä UFO!