Starship Asterisk*

by **orin stepanek** » Sat Aug 26, 2006 4:07 pm

http://antwrp.gsfc.nasa.gov/apod/ap060823.html
Maybe if your land rover had a top?

Orin

by **photojhh** » Thu Aug 24, 2006 2:49 am

Oops! Qev is absolutely correct. If we got into a Martian helicopter and observed the scene from directly overhead, those shadows would be parallel. But from the painting's angle, close to the surface, the shadows would indeed appear to radiate from the sun, just like in the photo Qev linked.

I stand corrected.

by **orin stepanek** » Thu Aug 24, 2006 12:30 am

How many threads do we have on the sand geysers? I do like the geysers though. Whether the artist's rendering is aesthetically correct or not.

Orin

by **Qev** » Thu Aug 24, 2006 12:21 am

Shadows cast by the Sun on the horizon should converge towards the vanishing point, should they not? I'm not really seeing anything wrong in the image myself...

Here's a good example: Crepuscular rays. Every 'beam' of light and shadow in this image is parallel, but they certainly don't look it...

by **Axel** » Thu Aug 24, 2006 12:07 am

Oh, duh!

It's as if the artist thought, "Now how can I put realistic shadows here? Let me just put this lightbulb next to these upright pineapples..."

When you say "parallel", you mean the shadows are parallel to each other, of course. Painters used to learn this in art school in our great-grandfathers' time.

by **photojhh** » Wed Aug 23, 2006 10:38 pm

Did you notice the big flaw in the artist's rendition of Martian sand geysers? (It's a great test of, "What's wrong with this picture?")

Answer: The shadows on the gas jets are oriented as if the sun were in front of the Martian horizon! Of course, in reality the rays from the Sun are nearly parallel by the time they hit anywhere on the surface of Mars.

by **Martin** » Wed Aug 23, 2006 5:26 pm

Oh I see -your speculating that may have happend--I get it now (man I need some more coffee).

by **ta152h0** » Wed Aug 23, 2006 4:20 pm

the bloody geiser went off at the exact moment MPL was hovering above.

by **Martin** » Wed Aug 23, 2006 4:18 pm

What happend?

by **ta152h0** » Wed Aug 23, 2006 3:55 pm

today's APOD
http://antwrp.gsfc.nasa.gov/apod/ap060823.html

That is what happened to Mars Polar lander, an unfortunate coincidence.

by **Axel** » Wed Aug 23, 2006 1:55 pm

Is there a line or group of words missing between the links "Mars" and "carbon dioxide"? I can't quite make out the sense.

It doesn't look like a safe place to be driving my Land Rover.

by **harry** » Tue Aug 22, 2006 7:07 am

Hello Aichip

Nice links Sir mate. It does prove that water erosion still occurs.

Sorry that I have not had the time to see the previous links

I do not know how I missed them.

by **aichip** » Mon Aug 21, 2006 8:29 pm

Indeed they were. I have many more such images as well, showing th effects of the ejection and pooling of a fluid medium, which clearly cannot be liquid carbon dioxide.

Note that these features must be relatively new, since the rate of erosion on Mars is pretty respectable. A two week period shows very significant movement and reshaping of the soil.

by **BMAONE23** » Mon Aug 21, 2006 7:12 pm

http://xenotechresearch.com/geyop122.htm

In this one it does seem apparent that the "Blueberries" were pushed away from the "Crack" as if by force.

by **aichip** » Mon Aug 21, 2006 6:13 pm

Here is what I posted quite some time back on my site about geysers on Mars. I have about five pages on them with color and 3D images. This is one geyser field above Endurance Crater.

http://xenotechresearch.com/imo114.htm

In particular look at the lower left and lower right images, and you can see what appears to be mud in the images. It defintely is not desiccated sand.

These two images are pretty clear:

http://xenotechresearch.com/o114clr5.jpg
http://xenotechresearch.com/o114clrc.jpg

And here is another perfect geyser vent from Sol 122:

http://xenotechresearch.com/geyop122.htm

So the "geysers on Mars" people are really a couple of years behind the curve here.

by **harry** » Sun Aug 20, 2006 12:39 am

Hello BMAONE

Thank you for the link.

This is fantastic.

I wander if we have similar images on the moons of Jupiter, Saturn and so on.

by **BMAONE23** » Fri Aug 18, 2006 6:55 pm

http://mpfwww.jpl.nasa.gov/odyssey/index.html

Another story

by **BMAONE23** » Wed Aug 16, 2006 5:30 pm

http://www.space.com/php/multimedia/ima ... MSSS%20%20

The image on the right appears to be an active field of CO2 geysers near the martian southern pole, you can see the ejecta material around the activity as well as the geysers and their associated shadows pointing (NW?)?

the story came from here
http://www.space.com/scienceastronomy/0 ... ecaps.html

Starship Asterisk*

Martian sand geysers (APOD 23 Aug 2006)

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Expand view Topic review: Martian sand geysers (APOD 23 Aug 2006)

Oops!

It's a light bulb

Big flaw in Martian sand geyser painting (APOD 23 Aug 2006)

the bloody geiser................

Sand geisers on Mars (APOD 23 Aug 2006)

Caption for today (APOD 23 Aug 2006)

geyser and erosion on Mars

Geysers on Mars

Martian sand geysers (APOD 23 Aug 2006)