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Old 08-February-2002, 02:05 PM
msussman msussman is offline
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Hmm, CNN just put up an article on the latest Hubble Space Telescope press release:

http://www.cnn.com/2002/TECH/space/0...axy/index.html

And I quote:

"A galaxy captured in the lens of the Hubble Space Telescope seems to be rotating in the direction opposite of what it should..."

Ahem, what's the objective on the Hubble? One more time, kids, say it with me: "mirror", not lens, "MIRROR".
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Old 08-February-2002, 04:30 PM
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The Bad Astronomer The Bad Astronomer is offline
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D'oh! Well, I emailed the author about it. He and I have talked before, and he wants me to simply send him a note when things like that happen. Hopefully he'll get it fixed soon.

That's two in one day (the other is the Japanese tea thread in this forum). Amazing work, Bad People.
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Old 08-February-2002, 04:58 PM
Hale_Bopp Hale_Bopp is offline
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Well, technically, the Hubble has a lens, doesn't it? Didn't they install a small lens to correct the distortion caused by the primary not quite being the correct shape?

Okay, I still wouldn't say the image was captured by the lens!

Gee, maybe someone who knows about the Hubble could answere that question...wonder if there is anyone on the board who has worked on the Hubble before [img]/phpBB/images/smiles/icon_wink.gif[/img]

Rob
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Old 08-February-2002, 05:09 PM
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Christopher Ferro Christopher Ferro is offline
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Actually, either way, the image was captured by the DETECTOR that receives the light after passing through the lens and reflecting off the mirror.

CJSF


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Old 08-February-2002, 05:30 PM
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There is no lens in the primary light path in Hubble. It's all mirrors. I think that one of the instruments (the Fine Guidance Sensors which help point the 'scope) do have lenses, but I have never confirmed that. Either way, the HST+WFPC has no lens in the path.
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Old 08-February-2002, 05:48 PM
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Christopher Ferro Christopher Ferro is offline
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Quote:
On 2002-02-08 13:30, The Bad Astronomer wrote:
There is no lens in the primary light path in Hubble. It's all mirrors. I think that one of the instruments (the Fine Guidance Sensors which help point the 'scope) do have lenses, but I have never confirmed that. Either way, the HST+WFPC has no lens in the path.
OK, agreed. But the DETECTOR - in this case the CCDs on the WFPC2 - still "captures" the light that will eventually become an image.

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<font size=-1>[ This Message was edited by: Christopher Ferro on 2002-02-08 13:48 ]</font>
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Old 08-February-2002, 05:53 PM
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Quote:
On 2002-02-08 12:58, Hale_Bopp wrote:
Didn't they install a small lens to correct the distortion caused by the primary not quite being the correct shape?
Actually, COSTAR isn't a lens but a set of small mirrors.
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Old 11-February-2002, 07:09 AM
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It was cleverly fixed, avoiding all the lens vs. mirror stuff written here:

A galaxy captured by the camera of the
Hubble Space Telescope...

Harald
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Old 11-February-2002, 12:46 PM
Hale_Bopp Hale_Bopp is offline
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Thanks...I didn't know exactly how COSTAR corrected the vision (and I forgot its name [img]/phpBB/images/smiles/icon_smile.gif[/img]

Rob
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Old 11-February-2002, 01:19 PM
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A quick web search shows that CN has been referring to Hubble lenses for over a decade. The BA's messages seem to be having little effect. A 1990 CNN article even referred to the HST first opening its "lens cover."
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