reply to post by anon72
It's nice to hear that a probe, especially a "land and return with sample" mission is going.
But....let's get a grip on reality, OK?:
The Rust color added for effect? Or is a true representation of what it really looks like. Look at the photos credits. NASA is stamped right
Yes....NASA is "stamped" there....where it clearly states "color enhanced." That can mean a lot of things....
(...and, the color? I seriously, seriously doubt it has anything at ALL to do with your later comments, regarding the possibility of Phobos being an
"artificial construct". Especially...rust?? Nope. Now, consider this-----the soil of Mars, and its sometimes dominant hue?? Think about that.
Also, the crater? Not a "dent", in that sense....it is a depression, most likely from an impact at some long time in the past...an impact AFTER
Phobos accreted, but not strong enough to break it apart...for, it is likely VERY fragile, with very light gravity, and is a fairly loose
configuration of matter, held together despite the paucity of gravity....because, well, that's how matter tends to clump, in a zero-G
People keep thinking (it seems) that the photo imaging equipment is similar to your Nikon (or whatever company) digital camera! It is not. There are
great threads, already, on ATS about the details....and there are resources online to search out, better than trying to write it up here.
Suffice to say, it's a whole heckuva lot more complicated....these probes are making images that have to be be transmitted, via radio signals....yeah,
you'd think it's like a TV camera or something, but they just don't have the broadband, nor the transmitter power required, to do the job the same
way. It is the scarcity of budgets, and what an agency like NASA must deal with....big compromises, at every turn...and they get quite ingenious and
creative, to solve the technical hurdles, given their limitations. Oh, and weight is an issue, too!! Payload, mass, etc.
Anyway, if I can find online sources, will link them. I find this interesting too --- and frankly, a lot of the specifics are so complex, they
require a full career of study to comprehend. We have a few ATS members (and Mods) who are able to explain/describe a lot of this, in lay person's
Here, may wish to read this, regarding other "enhanced color" photos, by HiRISE...of Deimos, but they mention Phobos too. AND, has hints about the
process, and the reason
for "color enhancing".
I believe this to be similar to, but not exactly the same as, "false color" imaging. These are methods to enhance, and define features....they
certainly should not be meant to exactly represent what the Human eye would perceive, on a direct viewing (when a Human is able to actually go there,
and look without instrumentation getting in the way.....).
Keep in mind, too...the Sun's distance, depending on which planet you visit, in our Solar System. And, its variable intensity, as a result of
distance. (Emitted light spectrum will, of course, remain the same).
Imagine you were looking at Jupiter....and how dim it would really be, that far away from the Sun. Hence, colors/contrast/brightness are enhanced, to
make them "prettier" for one, and for the science as well...depends on what they wish to emphasize, chemicals, features, etc....
edit on 8 December 2010 by weedwhacker because: (no reason given)