I managed to pull the scope out for a few minutes the other evening and snap a few shots with the Canon EOS 300D. I got one that came out fairly decent. Didn’t bother to align or plug in the clock drive. The Moon was approximately 10% illuminated.
Category Archives: Images
Terragen Mars: Valles Marineris
Welcome to Terragen Mars: Valles Marineris — the first installment of some visual explorations using Terragen for Mac OS X I hope to continue are time permits. Now on with the show!
Valles Marineris is a vast canyon system that runs along the Martian equator just east of the Tharsis region. As the largest canyon in the Solar System, it extends over 3,000 kilometers, spans as much as 600 kilometers across and is as much as 8 kilometers deep — 6 to 7 times deeper than the Grand Canyon. Spanning about 20 percent (1/5) of the circumference of the Mars, Valles Marineris is big enough to stretch across the entire continental United States.
The region was first discovered in 1971 by the spacecraft, Mariner 9. The first obiter to successfully reach Mars, it returned more than 7,329 images providing the first global mapping of the planet. After discovering the canyon system, mission scientists decided to name it after this spacecraft… Valles Marineris (Valley of Mariner). The origin of the canyon remains unknown, however most researchers agree that it began as is a tectonic fissure in the Martian crust. Forming as the planet cooled and affected by the rising crust in the Tharsis region to the west, it was subsequently widened by erosion. Near the eastern flanks of the rift there appear to be some channels that may have been formed by water.
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The above mosaic was created from 102 images of Mars taken by Viking orbiters in the 1970s. This view is similar to that which one would see from a spacecraft about 2,500 kilometers above the surface of the planet. Image Processing by Jody Swann/Tammy Becker/Alfred McEwen, using the PICS (Planetary Image Cartography System) image processing system developed at the U.S. Geological Survey in Flagstaff, Arizona.
Below are a number of renders I did of the central Valles Marineris region using Terragen. To calculate the surface topography I used a bump map of the surface of Mars obtained from Space-Graphics.com and overlaid the render with a shaded color image of the same area. The altitude of the camera was approximated by considering the scale of the image combined with the known maximum and minimum heights of the topography.
All of my renders here are vertically stretched by 133% to enhance the “majesty†of the region and should only be used for “gee whiz†purposes. Although, after examining the completed renders (with the exaggerated heights) it seems to me as if there may have been some type of liquid shaping of the entire region north the canyon… particularly in the second render from the NNW.
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Lastly, I created a Quicktime VR scene of the area from a position approximately 120 km above Melas Chasma – the large central area of the Valles Marineris canyon system.
Click here to open the QTVR scene of Valles Marineris in a new window
You’ll need Apple – QuickTime to view the file.
Enjoy! Any requests on where we explore next?
Ah the skies are clearing here and hopefully I’ll get the scope back outside in the next day or two.
Terragen: Olympus Mons for real
Ok, in our last episode I presented what will henceforth be known as my “Pitiful Rendering of a Flight Over Olympus Mons. For those of you that didn’t see it for one reason or another here is a frame of the animation depicting Olympus Mons on Mars:
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Yes it’s that lightly shaded pancake in the middle. Well as I mentioned in that post the scale was a little off and I could have done a better job with the terrain texture…
I think I got it now… 😉
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The cratering and surface striations are all correctly depicted now. As it took over 20 minutes to render this one image there won’t be a fly over anytime soon. I’m looking into creating a render farm with my 4 Macs running OS X. It’s built into every modern Macintosh with a technology called Xgrid. I’ve already been able to get the Macs working together but the problem I’m having is getting Terragen to recognize and utilize the cluster.
Ah well… cloudy night activities.
Terragen: Flight Over Olympus Mons
Sounds cool eh?
I took a Digital Elevation Map (DEM) of the surface of Mars, isolated the area around Olympus Mons, and imported it into Terragen. I then created a camera script of fly over the martian volcano. Admittedly I could have done a much better job with the surface texture and the vertical scale is a little off… but you get the idea! It took 14 hours to render this on my dual 1 GHz processor Mac so it wasn’t like I could say “oops let me fix that” and buzz off another render. Next time I’ll endeavor to get the scene looking perfect BEFORE I run the job.
My intention is to do a fly-though of Valles Marineris.
Anyway, here’s Olympus_Mons_Overflight.mov (6.9 MB)
You’ll need Apple – QuickTime to view the file.