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Message Subject Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
Poster Handle Dr. Astro
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For the same reason that there are no stars in the second picture; the exposure in the second picture was much faster and properly exposed the daylit surface of the comet. The coma is very dim like the stars and can only be seen by completely overexposing the nucleus as in the first picture.
 Quoting: Dr. Astro


OK, thanks for explaining. I had somehow imagined that coma development would result in visible activity on the comet surface. Probably a Hollywood-brainwash...
 Quoting: Anonymous Coward 1310161


As much as I enjoyed Deep Impact as a movie, it probably did a lot to mislead people. The scientific inaccuracies were rampant but less obvious to the layman than perhaps a more action oriented film like Armageddon. I see the same mistaken assumptions made by people all the time now, everything from massive thick jets of dense material coming from comets to the notion that an astronaut would be instantly blinded by the sun if his visor was up for any length of time.
 
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