Dawn's Survey Orbit at Ceres |
Dawn's Survey Orbit at Ceres |
Jun 15 2015, 05:47 PM
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
daily Ceres picture from the survey orbit
http://dawn.jpl.nasa.gov/multimedia/images...tml?id=PIA19572 I started a new topic, as we are no longer in the first orbit phase |
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Jun 23 2015, 02:40 PM
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Re the possibility of active plumes: As I recall, there was at least one terrestrial spectroscopic observation of a water vapor transient a few years back & the estimated total quantity of material was quite small, perhaps a few hundred kilograms. Presumably a surface feature erupting continuously enough to appear blurred in Dawn imagery would produce a far larger amount of water vapor over time with a correspondingly larger spectroscopic signature.
I don't know if similar observations are underway right now, but given the above it seems unlikely that we're seeing an active eruption here. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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