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Too bad Mars doesn't really look like this. | 343 comments | Create New Account
Comments belong to whoever posts them. Please notify us of inappropriate comments.
Too bad Mars doesn't really look like this.
Authored by: Nick_UK on Thursday, June 20 2013 @ 11:34 AM EDT
If it wasn't for NASA/USSR/the cold war, we would never had gone to the moon, or have robots on Mars and landers on venus ~ let alone the rest of the stuff.
OK, maybe now it seems dumbed down a lot, but I think that is because people are not interested anymore and NEED to be able to read and see dumbed down images to understand it (i.e. in the 60's/70's etc. it was really a WOW time - b&w images, fragmented sound et al- I know, I was there). The only time people say WOW now is when a new game comes out, or Internet speeds increase.

And you complain about colour calibration on images 40 years later. Phuff.

BTW, see this:

Venus, in B&W - a real WOW

Nick

[ Reply to This | Parent | # ]

Hmmmmm
Authored by: cricketjeff on Thursday, June 20 2013 @ 03:35 PM EDT
Except in sandstorms, Mars has a pale blue sky, reddish-brown dirt, and grayish
rocks with blue-green patches on them.

Trouble is ...

That ain't necessarily so, more or less the best anyone seems to be able to do
is that most of the time Mars has a sort of dirty yellow sky (probably due to
the characteristics of the dust, however it changes colour across the sky and
through the day. Colour patches do a really lousy job of getting the right
colour corrections because colours aren't "fixed" head out into a city
street lit with sodium lamps sometime and try to spot the colour of the cars
that pass. You cannot do so accurately our eyes and brains make the colours we
see based on the input from three (or four) sets of cone cells with completely
overlapping colour sensitivities and our own memories and experiences.
NASA, tried their best to get them "right" and found that when
photographic experts got hold of the files they largely disagreed about the
colours the images showed. The dust is largely reddish brown, probably because
of the prevalence of haematite but there are greyish, bluish and yellowish rocks
too, but so far very few distinctively coloured items to get a solid fix on.

After a lot of fuss they now appear to have settled on giving us the colours as
they come out of the camera (aside from brightening them to compensate for the
deliberate under-exposure (it's important not to burn out any bright regions).
Maybe one day we will get a successful European Chinese or Russian lander to
provide alternative images. Until then you are always free to turn your radio
telescope Marsward and intercept the data streams yourself and publish
unadulterated images.



---
There is nothing in life that doesn't look better after a good cup of tea.

[ Reply to This | Parent | # ]

  • Hmmmmm - Authored by: Anonymous on Thursday, June 20 2013 @ 06:10 PM EDT
    • Hmmmmm - Authored by: Anonymous on Thursday, June 20 2013 @ 09:02 PM EDT
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