The James Webb Space Telescope


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Profile JulieProject donor
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Message 1450571 - Posted: 6 Dec 2013, 9:49:46 UTC
Last modified: 6 Dec 2013, 9:57:49 UTC

The James Webb Space Telescope is a large space telescope, optimized for infrared wavelengths. It is scheduled for launch later in this decade. Webb will find the first galaxies that formed in the early Universe, connecting the Big Bang to our own Milky Way galaxy. Webb will peer through dusty clouds to see stars forming planetary systems, connecting the Milky Way to our own solar system. Webb's instruments will be designed to work primarily in the infrared range of the electromagnetic spectrum, with some capability in the visible range.

Webb will have a large mirror, 6.5 meters (21.3 feet) in diameter and a sunshield the size of a tennis court. Both the mirror and sunshade won't fit onto a rocket fully open, so both will fold up and open once Webb is in outer space. Webb will reside in an orbit about 1.5 million km (1 million miles) from the Earth.

The James Webb Space Telescope was named after the NASA Administrator who crafted the Apollo program, and who was a staunch supporter of space science.



Set for launch in 2018


http://jwst.nasa.gov/
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Message 1450624 - Posted: 6 Dec 2013, 14:11:59 UTC - in response to Message 1450571.

Thanks for the heads-up Julie ! :)
A new quest will certainly be full of discoveries and surprises...
Long live to JWST (from 2018, of course !).
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Message 1450674 - Posted: 6 Dec 2013, 16:27:57 UTC

Nice! Hadn't heard of this before (well, maybe, but I didn't know what it was.)
This looks like it will do for infrared what Hubble did for visible. Thanks Julie. :^)
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Message 1450767 - Posted: 6 Dec 2013, 19:40:10 UTC - in response to Message 1450674.

Thanks for the link Julie.
I will miss Hubble :(
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Message 1450774 - Posted: 6 Dec 2013, 20:06:16 UTC - in response to Message 1450767.

I will miss Hubble :(


What?!? No Hubble?!?

<<checks Hubble pages>>

Possibly you meant Kepler? (But it may be workable still...)
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Message 1450808 - Posted: 6 Dec 2013, 21:31:45 UTC - in response to Message 1450774.

I will miss Hubble :(


What?!? No Hubble?!?

<<checks Hubble pages>>

Possibly you meant Kepler? (But it may be workable still...)


When will the hubble be decommissioned?


Hubble is the only telescope designed to be serviced in space by astronauts. Between 1993 and 2002, four Space Shuttle missions repaired, upgraded, and replaced systems on the telescope; a fifth mission was canceled on safety grounds following the Columbia disaster. However, after spirited public discussion, NASA administrator Mike Griffin approved one final servicing mission, completed in 2009. The telescope is now expected to function until at least 2014, and possibly 2020.[10] Its scientific successor, the James Webb Space Telescope (JWST), is currently scheduled to be launched in 2018.
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Message 1450840 - Posted: 6 Dec 2013, 23:02:51 UTC

Thought it was going to be run until it failed, but considering how amazing it's been even being that old, and how far technology has advanced since it was launched, this one should be a worthy successor.
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Message 1452791 - Posted: 11 Dec 2013, 15:36:49 UTC

http://jwst.nasa.gov/resources/WebbUpdateDecember2013.pdf
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Message 1485309 - Posted: 6 Mar 2014, 13:11:01 UTC

Hertz: James Webb Telescope Still on Schedule for Launch Despite GAO Concerns


“JWST remains on plan, on budget, on schedule. It’s making great technical progress toward launch in late 2018,” Paul Hertz, director of NASA’s Astrophysics Division, told scientists attending the American Astronomical Society’s winter meeting Jan. 5-9 at the National Harbor, Md.

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Message 1485527 - Posted: 7 Mar 2014, 1:50:40 UTC
Last modified: 7 Mar 2014, 1:50:51 UTC

Hubble.... Kepler.... James Webb ....

i'm lost :P
sometimes i dont remember what does what, their purposes :P
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Message 1485764 - Posted: 7 Mar 2014, 16:11:06 UTC - in response to Message 1485527.
Last modified: 7 Mar 2014, 16:12:19 UTC

They are optical telescopes looking to different parts of the EM spectrum, mostly visible and UV for Hubble, longer wavelength IR for Webb. Kepler is looking at a chosen constellation searching for planets passing in front of stars and diminishing their luminosity.
Tullio
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Message 1488290 - Posted: 13 Mar 2014, 11:59:32 UTC

JWST is the successor to the Hubble Space Telescope. I guess Hubble will retire once they've launched the JWST, or maybe before the launch...
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Message 1488296 - Posted: 13 Mar 2014, 12:21:03 UTC - in response to Message 1488290.

JWST is the successor to the Hubble Space Telescope. I guess Hubble will retire once they've launched the JWST, or maybe before the launch...

Technically Hubble was suppose to have been retired in 2010 so it's been running on overtime (still it's doing pretty well in its advanced age).

From HubbleSite, http://hubblesite.org/the_telescope/hubble_essentials/quick_facts.php

Launch: April 24, 1990 from space shuttle Discovery (STS-31)
Deployment: April 25, 1990
Mission Duration: Up to 20 years

Cheers.

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Message 1488419 - Posted: 13 Mar 2014, 17:07:14 UTC

Hubble was saved by a Shuttle mission after being put in orbit with flawed optics It was upgraded by two more Shuttle missions. If the JWST incurs in some problem no mission can reach it. Kepler has overtaken its deadline but it is still working with different objectives.
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Message 1488517 - Posted: 13 Mar 2014, 19:09:39 UTC

If the JWST incurs in some problem no mission can reach it.


How's that? Waw, they're taking quite a chance then, an expensive one!
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Message 1488547 - Posted: 13 Mar 2014, 19:44:33 UTC

That's why they have to do everything within their power to make sure it is capable of completing it's mission before it is launched. It is ironic that Hubble sat around in storage for several years before it got it's ride into space. Plenty of time to check things like optics before it ever left the ground. I think now that they have learned their lesson and assume nothing.
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Message 1488557 - Posted: 13 Mar 2014, 19:54:51 UTC - in response to Message 1488547.

That's why they have to do everything within their power to make sure it is capable of completing it's mission before it is launched. It is ironic that Hubble sat around in storage for several years before it got it's ride into space. Plenty of time to check things like optics before it ever left the ground. I think now that they have learned their lesson and assume nothing.



That's 'gekkenwerk' we call it in Dutch, work for crazy men...
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Message 1489304 - Posted: 15 Mar 2014, 12:18:32 UTC - in response to Message 1488557.

The JWST has to deploy its mirrors in space,since it they are launched folded. That is a big risk.
Tullio
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Message 1494049 - Posted: 23 Mar 2014, 16:57:05 UTC

It always amazes me how fragile cargo like this makes it safe and sound into space after a tumultuous rocket launch.
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Message 1494226 - Posted: 23 Mar 2014, 22:43:59 UTC

I'm pretty sure that the Hubble telescope rode into space in the cargo bay of the shuttle. While still a bumpy ride a shuttle launch when everything went right was not as rough as the ride that most satellites endure.
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