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Thread started 19 Apr 2009 (Sunday) 05:12
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Has anyone actually photographed any apollo stuff

 
ron ­ chappel
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Apr 19, 2009 05:12 |  #1

Has anyone ever heard of a situation where a large telescope has been used to attempt photographing debris from the apollo missions?

I've heard it said that the hubble telescope couldn't see any apollo landers because it isnt built with enough magnifying ability -it's more like a wide field device (?)




  
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Bernoulli
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Apr 19, 2009 09:05 |  #2

Can't be done with any current scope, on the ground or in orbit.

Hubble has the highest resolution of any telescope every made at about 1/15 arc second. This amounts to about 100 m on the moon, which is about a factor of 25 insufficient resolution to see any hardware left behind. The biggest piece, the lunar lander descent stage, is 4.2 m in diameter.

The best resolution from ground-based scopes is an occasional 300 m, although many experienced amateurs can do 600 m routinely.

So it can't be done and probably won't be possible for a long time if ever. It would take an orbiting scope that's about 60 m diameter to resolve the largest piece as a single dot.


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ron ­ chappel
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Apr 19, 2009 22:10 |  #3

Thanks Bernoulli.That explains it perfectly
I did wonder about spy satelites but i guess they aren't up to hubble's standards either.

As a matter of interest,i think i first heard of this subject some time ago.Not as a means of taking images because they would be interesting,but as a way to prove to conspiracy idiots that someone DID actually go there.
Of course such a photo would prove nothing to those imbeciles,lol .They'd just say the photo's are faked ;);)




  
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Bernoulli
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Apr 19, 2009 22:53 as a reply to  @ ron chappel's post |  #4

That's not to say that hardware hasn't been photographed on the Moon, it just hasn't been imaged from Earth. From lunar orbit, I know that at least one Surveyor lander was imaged by a Lunar Orbiter back in the 60's:

http://nssdc.gsfc.nasa​.gov …ject_page/lo3_h​194_1.html (external link)

And I think another orbiter called Clementine imaged the Apollo 15 landing site and, while it couldn't quite make out the lander, it could see the dust it cleared away while landing.

Spy satellites are, of course, in Earth orbit. Some of the old Keyhole series were comparable with Hubble in mirror size but they were looking at the Earth, not the Moon. Modern spy sats can resolve about 0.1 meter or 4 inches. They can't read license plates, but they can tell if a car has one or not. I saw an interview with some old NRO guy and he said you can tell if a Russian sailor is wearing his cap or not!

When we get the Lunar Reconnaissance Orbiter in place later this summer, we'll be seeing 0.5 meter images that'll clearly show almost everything either we or the Ruskies ever put on the surface.

I know one of those nuts who think we never went there, and there's no convincing him or people like him!


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ron ­ chappel
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Apr 20, 2009 02:42 |  #5

Hey,while w are on this subject there is another thing i read that i can't find info on anymore-
I'm pretty sure i read that the hubble imaging chip is only about 3 mega pixels-is that somewhere near the truth? I have no doubt these sensors have extremely high quality pixels though!Maybe it's even the same chip the mars rovers used..?
Does anyone know where i can find info about all this,i think its interesting:)




  
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Fut
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Apr 20, 2009 03:55 |  #6

ron chappel wrote in post #7765684 (external link)
Hey,while w are on this subject there is another thing i read that i can't find info on anymore-
I'm pretty sure i read that the hubble imaging chip is only about 3 mega pixels-is that somewhere near the truth? I have no doubt these sensors have extremely high quality pixels though!Maybe it's even the same chip the mars rovers used..?
Does anyone know where i can find info about all this,i think its interesting:)

The Wide Field and Planetary Camera 2 (WFPC2), which was installed during the first servicing mission in 1993, and which has taken many of the signature images produced by the telescope, consists of 4 CCD chips, each 800 pixels by 800 pixels. This basically means it is a 1600 x 1600 pixel camera or about 2.5 mega-pixels.

http://en.wikipedia.or​g/wiki/Wide_Field_... (external link)

The Advanced Camera for Surveys (ACS) was installed in 2002. It has several components. The Wide Field Channel has 2 CCD chips, each 2048 x 4096 pixels for a total of 16 mega-pixels.

http://en.wikipedia.or​g/wiki/Advanced_Ca... (external link)

The Wide Field Camera 3 (WFC3), which is to be installed during the servicing mission in 2009, will also have 2 CCD chips each of 2048 x 4096 pixels for a total of 16 mega-pixels.

http://en.wikipedia.or​g/wiki/Wide_Field_... (external link)


Günter
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ron ­ chappel
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Apr 20, 2009 06:33 |  #7

Wow,thanks Gunter
I tried doing some research some time ago but couldn't find much.Wikipedia has everything huh




  
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renderwerks
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Apr 20, 2009 14:52 |  #8

Thanks Bernoulli and Fut, interesting stuff - great reading.


Rick-
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Has anyone actually photographed any apollo stuff
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