Clouds, Clouds over Victoria |
Clouds, Clouds over Victoria |
Oct 12 2006, 10:38 PM
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#31
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
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Oct 13 2006, 02:52 AM
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#32
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Member Group: Members Posts: 233 Joined: 21-April 05 Member No.: 328 |
Astro0, your sky/ground image is gorgeous as well.
Which brings me to an interesting question -- and forgive (and enlighten) me if this has been covered in another thread: It is fascinating to me how the Martian atmosphere -- which is, what, only 1/100th as dense as earth's ? -- can be so effective in creating the diffusion and softening and atmospheric perspective which we associate with the earth, as opposed to the incredibly harsh images from the surface of the moon. Someone care to enlighten me on this topic, or point me to the relevant thread? |
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Oct 13 2006, 03:12 AM
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#33
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
The brightness (and pinkish colour) of the Martian sky is due mostly to the dust in the atmosphere. If there were no dust, the sky would be very dark blue, as you'd expect for such a thin atmosphere.
We actually see the Martian sky brightness and colour vary with the seasons, as there's more dust at certain times of the year (summer, I think). |
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Oct 13 2006, 11:36 AM
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#34
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Here's my take on the Meridiani cloud image. Astro0 I like that version VERY much - almost exactly as I was seeing it in my head except that I had the colouration somewhat less intense and more greyish (and even I with very primitive means can tweak that). I feel like I'm learning to breathe the Martian air now. |
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Oct 13 2006, 11:50 AM
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#35
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Member Group: Members Posts: 236 Joined: 21-June 05 Member No.: 417 |
I know there is a little program for finding the right Sol but i can't find it. jvandriel http://personal.strath.ac.uk/a.goddard/timestamp.swf |
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Oct 13 2006, 05:21 PM
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#36
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Senior Member Group: Members Posts: 2807 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
Thanks general,
that is the one I was looking for. jvandriel |
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Oct 13 2006, 07:40 PM
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#37
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Member Group: Members Posts: 877 Joined: 7-March 05 From: Switzerland Member No.: 186 |
The brightness (and pinkish colour) of the Martian sky is due mostly to the dust in the atmosphere. If there were no dust, the sky would be very dark blue, as you'd expect for such a thin atmosphere. Awesome pics here! But something is still misty to me. Shouldn't it be so that on Mars the horizon sight appears in deeper shade of red than around the zenith that gets less reddish/pinkish/... and yet darker (and even a little blue) because of mainly less dust and also less atmosphere in the line of sight? -------------------- |
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Oct 13 2006, 09:40 PM
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#38
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Awesome pics here! But something is still misty to me. Shouldn't it be so that on Mars the horizon sight appears in deeper shade of red than around the zenith that gets less reddish/pinkish/... and yet darker (and even a little blue) because of mainly less dust and also less atmosphere in the line of sight? My impression from the evidence I've seen and read so far is:- Close to the horizon pinkish/yellowish, think (caucasian) flesh tones. At zenith darker version of same colour, perhaps a tiny bit less yellow and more indigo but only a tiny bit, seldom if ever enough dust clearance to be midnight blue as it would be without dust. Clouds pearly silver. Some noctilucent clouds too. |
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Oct 13 2006, 09:57 PM
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#39
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Wow, Astro0!
-------------------- I always think before posting! - Marco -
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Oct 14 2006, 06:24 PM
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#40
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
I missed to process also Sol949 Michael's projection (now with some desaturation toward zenith...):
-------------------- I always think before posting! - Marco -
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Oct 17 2006, 05:57 AM
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#41
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Wow! This gets better and better. Nice job, Ant. Somebody alert APOD! And someone did: http://antwrp.gsfc.nasa.gov/apod/ap061017.html Even though biggest part of the work was made by the 3 guys in the credit list, I contributed to the final version they published with improved colorization. I asked to add my name in the credit list, hoping isn't too late... -------------------- I always think before posting! - Marco -
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Oct 17 2006, 08:28 AM
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#42
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Senior Member Group: Members Posts: 1619 Joined: 12-February 06 From: Bergerac - FR Member No.: 678 |
Wow! Incredible!
I'm agree with Dilo, he had contribute to this picture -------------------- |
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Oct 17 2006, 08:37 AM
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#43
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Member Group: Members Posts: 221 Joined: 25-March 05 Member No.: 217 |
Dilo your picture (post 40) makes it look like Venus got very close to Mars
Roy F |
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Oct 17 2006, 08:37 AM
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#44
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
Congrats, you did it again!
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Oct 17 2006, 08:37 AM
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#45
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Congrats to all involved for making APOD once again!
Sadly, this reminds me again of the difference in "approval" of publishing raw data products between MER and Cassini, but let's not spoil this moment. Awesome image indeed! -------------------- |
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