APOD: Cylindrical Mountains on Venus (2016 Oct 16)

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APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by APOD Robot » Sun Oct 16, 2016 4:09 am

Image Cylindrical Mountains on Venus

Explanation: What could cause a huge cylindrical mountain to rise from the surface of Venus? Such features that occur on Venus are known as coronas. Pictured here in the foreground is 500-kilometer wide Atete Corona found in a region of Venus known as the Galindo. The featured image was created by combining multiple radar maps of the region to form a computer-generated three-dimensional perspective. The series of dark rectangles that cross the image from top to bottom were created by the imaging procedure and are not real. The origin of massive coronas remains a topic of research although speculation holds they result from volcanism. Studying Venusian coronas help scientists better understand the inner structure of both Venus and Earth.

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Chris Peterson » Sun Oct 16, 2016 4:28 am

Lots of malformed links in this caption that need to be fixed.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by geckzilla » Sun Oct 16, 2016 5:51 am

Strange, I couldn't find a single malformed link.
Just call me "geck" because "zilla" is like a last name.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Joe Stieber » Sun Oct 16, 2016 6:20 am

I didn't find any bad links either.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Stevie » Sun Oct 16, 2016 6:24 am

The conspiracy theorists will have a field day with the dark rectangles!
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Guest » Sun Oct 16, 2016 6:35 am

Are the vertical elevations of the structures in this image exaggerated? If so, by how much?
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Uwe » Sun Oct 16, 2016 9:37 am

Venus - one hell of a planet :wink: .
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by ygmarchi » Sun Oct 16, 2016 11:44 am

apod always amazing. I wish we went back to Venus soon.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by rstevenson » Sun Oct 16, 2016 12:43 pm

Guest wrote:Are the vertical elevations of the structures in this image exaggerated? If so, by how much?
It certainly looks like that is the case.

I did a rough measurement from the original image (found from the "featured image" link). The height of the very white cliff of the nearest large blob (in the right-foreground) is about 1/8 the width, and the width is 450km, according to the JPL description. So the hight is roughly 55km. I recall seeing an article somewhere online about Mercury in which the fault cliffs were said to rise for "several kilometers". I don't think they meant 55km. I'd guess the height is exagerated here by a factor of 10 or so.

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by heehaw » Sun Oct 16, 2016 2:09 pm

Vertical exaggeration! So many pictures are, well, falsified. Always for noble reasons, of course. I remember reading of a tourist complaining, in a tour of Virginia's Luray Caverns, at the guide using UV to cause rocks to fluoresce. "Not natural! I want the natural appearance," he said. The guide agreed, and obligingly turned off all of the lights.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Chris Peterson » Sun Oct 16, 2016 2:10 pm

geckzilla wrote:Strange, I couldn't find a single malformed link.
Yeah. Weird. About half the links when I first tried were broken. A kind of broken I've seen before, where they looked like a local link with a URL tacked on the end. I was wondering if the vertical scale was exaggerated, and couldn't get to the "featured image" without editing the link. Fine now, though. Must have just caught the server acting up briefly.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Cousin Ricky » Sun Oct 16, 2016 2:19 pm

This image just screams vertical exaggeration at me, but I can't find any text stating so.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Hack Scribbler » Sun Oct 16, 2016 2:30 pm

I think they're eons-old impact craters.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Chris Peterson » Sun Oct 16, 2016 2:36 pm

Cousin Ricky wrote:This image just screams vertical exaggeration at me, but I can't find any text stating so.
If you look at the linked geological map, the vertical range of the structure is no more than 3 km. So it's clearly been very exaggerated.

EDIT: here's the altimetry map, with Atete Corona circled.
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Venus-GeologicGeomorphic-Map-of-the-Galindo-Quadrangle-V-40p.jpg
Last edited by Chris Peterson on Sun Oct 16, 2016 5:48 pm, edited 1 time in total.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Coil_Smoke » Sun Oct 16, 2016 3:09 pm

Stevie wrote:The conspiracy theorists will have a field day with the dark rectangles!
More curious than those projection calibration marks is the path winding across and up the floor of Atete Carona ...
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by bystander » Sun Oct 16, 2016 3:11 pm

Chris Peterson wrote:
geckzilla wrote:Strange, I couldn't find a single malformed link.
Yeah. Weird. About half the links when I first tried were broken. A kind of broken I've seen before, where they looked like a local link with a URL tacked on the end. I was wondering if the vertical scale was exaggerated, and couldn't get to the "featured image" without editing the link. Fine now, though. Must have just caught the server acting up briefly.
I fixed the links here last night after seeing Chris's first post. The APOD page source has many links preceded with a space (href=" ). Everywhere that occurred in the source, the link here was preceded with 'http://apod.nasa.gov/apod/%20'.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by geoffrey.landis » Sun Oct 16, 2016 3:41 pm

There are, I'm told, good reasons for vertical exaggeration, but I really wish that this would be explicitly called out when it is done.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by JohnD » Sun Oct 16, 2016 4:37 pm

No idea about links; vertical exaggeration just lets you see the formation when otherwise you couldn't.

What as these "coronas"? The only Earthlike formation I can think of is a volcanic plug, frozen magma in an eroded volcano, but then I'm no geologist.

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by neufer » Sun Oct 16, 2016 5:06 pm

Click to play embedded YouTube video.
JohnD wrote:
No idea about links; vertical exaggeration just lets you see the formation when otherwise you couldn't.

What as these "coronas"? The only Earthlike formation I can think of is a volcanic plug, frozen magma in an eroded volcano, but then I'm no geologist.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Boomer12k » Sun Oct 16, 2016 8:40 pm

Possible hot spot underneath. Maybe Venusian plate movement, and pressure...maybe large Magma Chamber underneath, like Yellowstone National Park...

Hey.... HOT SPRINGS.... goin' ta Venus...ah'm gonna be rich!!!!!

My guesses...

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Boomer12k » Sun Oct 16, 2016 8:41 pm

Love the Alien "space port" indicators....just follow the hash marks...

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by leon.l7027@gmail.com » Sun Oct 16, 2016 8:49 pm

Puts me in mind of the giant Yellowstone caldera.
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Astronymus » Sun Oct 16, 2016 9:01 pm

Looks like rock plates wobbling above calderae. As Venus has no earthlike tectonics this may be the way für the planet to release "pressure".

Venus may be a pressure cooker. Would explain all those vapors in the atmosphere. :wink:
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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by jhagerty@juno.com » Sun Oct 16, 2016 9:41 pm

Stevie wrote:The conspiracy theorists will have a field day with the dark rectangles!
It's obviously the start of the trans-Venusian railway.

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Re: APOD: Cylindrical Mountains on Venus (2016 Oct 16)

Post by Rathkennamike » Sun Oct 16, 2016 10:25 pm

Hack Scribbler wrote:I think they're eons-old impact craters.
I agree, the item front and just off centre looks like an impact crater (vertical exagguration accepted)
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