NASA, ATK Commercial Partnership / GRAIL Launch

John

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Sep 13, 2011, 5:38:01 PM9/13/11

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Brian Gaff

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Sep 14, 2011, 3:05:48 AM9/14/11

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You know what I'm thinking. There is a lot of 'partnerships' stuff going on
but not much real hardware being made. Kind of the equivalent of vapourware
in the software industry.
Also, this business on the James Webb Telescope. How long is the
telescope supposed to last? One assumes that it needs some kind of advanced
cryogenic system to keep things cold enough to be sensitive enough to be of
any use. How is this being done? If by a heat pump of some kind, surely it
will wear out and if by supplied coolant it will certainly run out.

Brian

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Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: bri...@blueyonder.co.uk
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"John" <spac...@alexandria.cc> wrote in message
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André, PE1PQX

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Sep 14, 2011, 5:02:19 AM9/14/11

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Brian Gaff drukte met precisie uit :

> You know what I'm thinking. There is a lot of 'partnerships' stuff going on
> but not much real hardware being made. Kind of the equivalent of vapourware
> in the software industry.
> Also, this business on the James Webb Telescope. How long is the telescope
> supposed to last? One assumes that it needs some kind of advanced cryogenic
> system to keep things cold enough to be sensitive enough to be of any use.
> How is this being done? If by a heat pump of some kind, surely it will wear
> out and if by supplied coolant it will certainly run out.

> Brian

The cryogenics will receive some assistance by placing the Webb
Telescope in the L2 Lagrangian point, witch is in the Earth-shadow of
our sun.
(see http://en.wikipedia.org/wiki/Lagrangian_point )

In other words: The temperature effects of the sun are far less on Webb
than on Hubble

JF Mezei

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Sep 14, 2011, 3:26:45 PM9/14/11

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Brian Gaff wrote:
> You know what I'm thinking. There is a lot of 'partnerships' stuff going on
> but not much real hardware being made. Kind of the equivalent of vapourware
> in the software industry.

You didn't think that PORK to the space industry would stop when NASA
stopped manned space flights, did you ? Those companies will continue to
receive *their* share of tax dollars.

Brian Gaff

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Sep 15, 2011, 12:15:07 AM9/15/11

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I notice that its the usual suspects, with a few new ones thrown in as a
distraction.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: bri...@blueyonder.co.uk
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"JF Mezei" <jfmezei...@vaxination.ca> wrote in message
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Dr J R Stockton

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Sep 16, 2011, 4:47:45 PM9/16/11

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In sci.space.shuttle message <9db8sv...@mid.individual.net>, Wed, 14
Sep 2011 11:02:19, =?ISO-8859-15?Q?Andr=E9 <?@?.?.pe1pqx.eu.invalid>
posted:

It is not. See the L2 section of that article. See also in section
<http://www.merlyn.demon.co.uk/gravity4.htm#Ap1>

>In other words: The temperature effects of the sun are far less on Webb
>than on Hubble

It is considered best to have the Webb assembly in a constant-
temperature situation, rather than partially shaded.

--
(c) John Stockton, nr London, UK. ?@merlyn.demon.co.uk Turnpike v6.05 MIME.
Web <http://www.merlyn.demon.co.uk/> - FAQqish topics, acronyms and links;
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