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Space Science

Clock Ticking for Hubble 406

DoraLives writes "Ok then, what are we going to do with Hubble? Eventually, it MUST come down. The New York Times has a piece that addresses this less than pleasant (at least for the astronomical community) subject. Additionally "The decision about what happens then has been complicated by the breakup of the Columbia." Read all about it."
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Clock Ticking for Hubble

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  • by James A. A. Joyce ( 681634 ) on Saturday July 26, 2003 @07:30PM (#6541976) Journal
    Why would that complicate things? All the incident proved was what we know already. Besides, Hubble's done some great things, and of course it'll have to come down eventually. We just have to move on and produce a successor.
    • why down? (Score:4, Funny)

      by fishbowl ( 7759 ) on Saturday July 26, 2003 @07:31PM (#6541979)
      Why not just shove it into a bit higher orbit?
      • Re:why down? (Score:4, Informative)

        by Anonymous Coward on Saturday July 26, 2003 @08:15PM (#6542172)
        Consider what you are suggesting for a sec, OK?

        (1) Space Shuttles cannot push it up to much higher earth orbit.

        (2) hence you will require a propulsion system to be attached to the HST and then launch into a new, higher orbit.

        (3) however, the HST is not designed to take such ad-hoc propulsion system.

        (4) and neither NASA has such convenient propulsion system sitting around (Air Force does,
        IIRC).

        (5) in any case, you have to do R&D to find a way to attach such system and safely launch the HST into a new orbit (consider multitude of risks; the major one that I see is supersonic vibration generated by the rocket).

        (6) knowing this is NASA, it'd take a decade to get that sort of things built and launched. Waste of the limited resource. They'd rather build a new telescope (or try to build) with that resource.

        In short, I guess it CAN be done. But not without additional resource and public support.

        -b
      • Re:why down? (Score:2, Insightful)

        by shokk ( 187512 )
        Because it becomes obsolete and eventually unusably old technology even to the most diehard fans. Then, it is just space junk, succumbing to a cascade effect of breaking down into smaller and smaller (and faster and faster) pieces that pose a huge threat to manned travel. Orbital space needs to be cleaned up not filled up, thus satellites are now brought down one way or another.
    • by SiO2 ( 124860 ) on Saturday July 26, 2003 @08:33PM (#6542235) Homepage
      We just have to move on and produce a successor.

      A successor to Hubble is already in the works. See this [yahoo.com] article on Yahoo! news.

      From the article:

      But its days (and nights) have always been numbered. NASA has long planned to end Hubble's spectacular run and bring it down in 2010 to make way in the budget for the James Webb Space Telescope, scheduled to be launched in 2011.

      SiO2
      • by LMCBoy ( 185365 ) on Saturday July 26, 2003 @09:42PM (#6542474) Homepage Journal
        Well, calling JWST a successor to HST is a bit of a stretch, actually. JWST will be great for its intended mission of studying high-redshift galaxies, but it is a specialized instrument; not the general-purpose workhorse that HST exemplified. Plus, it will be at a lagrange point, and therefore completely unserviceable. So much for upgrades.
        • by Gumshoe ( 191490 ) on Sunday July 27, 2003 @05:46AM (#6543651) Journal
          JWST will be great for its intended mission [...] it will be at a lagrange point, and therefore completely unserviceable.


          The lagrange point in question is Lagrange Point 2 (L2) of the Earth-Sun system. A notable characteristic of L2 is that it is always on the night side of Earth orbit (ie. the Earth is always in between L2 and the Sun). Clearly, this is advantageous for a telescope like the James Webb.

          As a side note, L1 is opposite to L2 and is therefore, always on the day side. As might be expected, L1 is currently occupied by The Solar and Helioscopic Observatory, or SOHO [nasa.gov]

          Further, the reason why satellites at either of these points are (currently) unservicable is simply a consequence of distance; approx. 100th of 1 AU, or, 4 times the distance of Earth to Moon.
    • by NMerriam ( 15122 ) <NMerriam@artboy.org> on Saturday July 26, 2003 @08:43PM (#6542268) Homepage
      The Columbia was the only shuttle capable of holding the Hubble in the cargo bay -- the other 3 orbiter have the airlock in the front portion of the bay, which gives extra room in the crew area. When they built the Hubble, they literally had about 3 inches of extra space to fit it in the shuttles.

      The four orbiters are not identical, they've been upgraded and changed as time went on. It was years after the Hubble was launched that they upgraded the airlocks in the other orbiters, purposely keeping the Columbia with the old design so it could be used on Hubble service missions.
      • by PPGMD ( 679725 ) on Saturday July 26, 2003 @10:06PM (#6542558) Journal
        One little problem with that Discovery was the orbiter that delivered the Hubble Space Telescope, during STS-31, in the first place.

        Discovery was also the shuttle that did the 1999 maintenance (STS-103). Endeavor did the 1993 maintenance (STS-61), and finally Columbia did the 2002 maintenance (STS-109).

        The maintenance can be preformed by any of the shuttles as long as they have the Payload Deployment and Retrieval System (the robotic arm).

        The retrieval (as it appears that they may want to do) is another story, but I believe that they can remove the upgraded airlock.

      • The Columbia was the only shuttle capable of holding the Hubble in the cargo bay -- the other 3 orbiter have the airlock in the front portion of the bay, which gives extra room in the crew area.
        The ODS (Orbiter Docking System) airlock is not a permanent installation, and can be removed at will. Currently it's normally left installed because it's required for ISS docking missions and removing it represents uneeded complication and expense.
        The four orbiters are not identical, they've been upgraded and changed as time went on.
        Not true at all. NASA makes every effort to maintain the configurations as close as possible. Multiple configurations increase the difficulty of mission planning and training, and increase the total operating costs of the fleet as well.
        It was years after the Hubble was launched that they upgraded the airlocks in the other orbiters, purposely keeping the Columbia with the old design so it could be used on Hubble service missions.
        Not quite correct. The problem is that Columbia was heavier than her sisters, and with the ODS installed was hard pressed to carry a useful payload to the ISS. (Which after all is the Shuttle's primary mission.) Because of this, Columbia was left without the ODS semi-permanently installed to allow the flight of Spacehab and other missions that required the full length of the cargo bay.
  • Taco Bell (Score:5, Funny)

    by Synithium ( 515777 ) on Saturday July 26, 2003 @07:32PM (#6541985)
    Of course, Taco Bell will put a big floating bullseye in the ocean and if some titanium part of hubble hits it everyone in the US wins a Taco!

    Wooo Hoooo!
  • by Anonymous Coward on Saturday July 26, 2003 @07:34PM (#6541995)
    Why don't we get some other country
    to foot the bill on boosting it
    into a sustainable orbit and paying
    for the initial maintenance after
    2010. I'm sure that an India or
    Taiwan would be willing to take it on
    for less than $500 million.
  • by CokeBear ( 16811 ) on Saturday July 26, 2003 @07:35PM (#6541999) Journal
    Click here [nytimes.com]
  • Cant we just strap some rockets and launch it into deep space for our decedents to find?:)
  • What about the idea of just leaving it up there? Maybe send it towards the sun to be destroyed, if that's possible, rather than just leaving it to float and potentially get in the way later.

    Implications?
    • Re:Must come down? (Score:3, Interesting)

      by po_boy ( 69692 )
      It will fall out of orbit eventually if you don't do anything about it. Satellites periodically lifted a bit to keep them up there. "Just leaving it up there" actually costs money. That's why many old satellites are "deorbited".
    • Re:Must come down? (Score:2, Informative)

      by Synithium ( 515777 )
      Most satellites go up into space with a designated shelf life. They are supposed to be brought down under their own power to save the trouble of building a space-garbage collector if it died and became unresponsive.

      So Hubble's self-propulsion system is supposed to go bad in 8 years so they bring it down in 7.
    • Re:Must come down? (Score:5, Informative)

      by henley ( 29988 ) on Saturday July 26, 2003 @07:50PM (#6542077) Homepage

      Hubble is in Low Earth Orbit (LEO). It's got an orbital velocity of around 4KM/Sec.

      To raise the orbit far enough to get to the Moon, takes a total deltaV of 7KM/S (or another 3KM/S on it's current speed).

      The Earth orbits the sun at around 30KM/S, give or take. So to send something - anything - into the sun requires a deltaV of the same amount: you've got to cancel out the existing 30KM/Sec velocity, otherwise you're just going to send the object into a different orbit around the sun

      The fastest any object has left the earth is around 8KM/S for the interplanetary probes (Pioneer, Voyager, Cassini, Galileo etc). That's as fast as the human race has ever gotten anything going[*]. Without a major advance in rocket technology (i.e. away from chemical rockets), that's about as fast as we're going to get anything going, too.

      As a reference, the on-orbit manoever capability of the Shuttle, is a total of about 100M/S

      Oh, and Hubble has much MUCH less manoever capability than this

      This is why things are de-orbited, rather than "sent towards the sun" or further out. De-orbiting from LEO requires only a little "kiss" of deceleration before the orbit intersects the atmosphere, from where friction does the rest. The only exceptions are Satellites in higher orbits (e.g. GPS in the 12-hr / 12,000KM orbits, or Geostationary sats) which tend to be "retired" in slightly higher orbits because these are thought to be more stable over longer (geological) time periods than lower ones, and there's not enough residual manoever capability to lower the orbit enough to graze the atmosphere


      [*] = However, we've learnt the trick of gravitational assists which lets Mother Nature (or Newton, or Einstein depending on your religious orientation :-) speed up our probes considerably at the expense of the orbital energy of the planet we're assisting from.

      • I'd rather have a bottle in front of me than a frontal lobotomy

        and I'd rather have a free bottle in front of me than a pre-frontal lobotomy.

      • Pickery of nits. (Score:4, Interesting)

        by DoraLives ( 622001 ) on Saturday July 26, 2003 @10:06PM (#6542561)
        Hubble is in Low Earth Orbit (LEO). It's got an orbital velocity of around 4KM/Sec.

        Off by a factor of two, give or take. 8 km/sec for a typical LEO velocity would be better.

        The Earth orbits the sun at around 30KM/S, give or take.

        This one's right where it ought to be.

        The fastest any object has left the earth is around 8KM/S for the interplanetary probes

        8 miles per second it is. Chalk it up to a conversion error.

        Otherwise your post is on the money. Yeah yeah, I know I know, it's a damnable bit of persnickityness, but no sense in giving folks bad numbers when good ones are just as cheap, eh?

  • Didn't anyone watch the MST3K movie?

    "Mike broke the Hubble! Mike broke the Hubble!" [tripod.com]

  • One has to wonder (Score:3, Interesting)

    by curtlewis ( 662976 ) on Saturday July 26, 2003 @07:39PM (#6542033)
    If sending up a Shuttle to re-establish a fresh orbit for Hubble would be cheaper than building a new and improved Hubble and launching it?

    Not that 're-deployment' would be easy, mind you, but unless there's some kind of fuel issue, I don't see why it wouldn't be possible (bearing in mind I'm far from an expert on the subject).

    On one hand, it would develop skills for astronauts that would be needed on the Space Stations, on the other, it's not cheap and doesn't provide advancement in deployed equipment.

    Then again, maybe in 50 years, retrofitting sattelites for technology upgrades by Space Station personnel might become a regular thing.

    "Gotta do an EVA to install an upgrade on the Hubble, back in about half an hour. Want me to pick up anything while I'm out?"

    • No (Score:4, Informative)

      by s20451 ( 410424 ) on Saturday July 26, 2003 @07:46PM (#6542067) Journal
      If sending up a Shuttle to re-establish a fresh orbit for Hubble would be cheaper than building a new and improved Hubble and launching it?

      Development cost of Hubble: $2 billion
      Cost of one space shuttle launch: $600 million

      So you can get in excess of three launches for the same cost of the Hubble.
      • by TummyX ( 84871 )
        Um. How many space shuttle launches would it take to send up the parts and then build the hubble?
  • How difficult would it be for us to use some other craft to boost the hubble into a higher orbit? it's not as if it's any secret what coupling mechanism it has, it should be easy (relatively speaking) to have something unmanned do it.

    In terms of maintenance of the Hubble, why don't they consider a structure that allows them to completely envelop and grapple to the telescope, so that they can work without nearly as serious a risk of losing parts while it's disassembled? Whatever they would employ wouldn
  • Hubble? (Score:3, Interesting)

    by Quasar1999 ( 520073 ) on Saturday July 26, 2003 @07:41PM (#6542046) Journal
    We spent so much time, money and effort fixing it, why not spend some more and upgrade it for another decade of use?
    • Re:Hubble? (Score:4, Insightful)

      by anthony_dipierro ( 543308 ) on Saturday July 26, 2003 @08:01PM (#6542122) Journal

      We spent so much time, money and effort fixing it, why not spend some more and upgrade it for another decade of use?

      Same reason many people will junk an old car which they've spent lots of time, money, and effort fixing. It's nearly the same cost to just buy a new one as to fix the old one, and the new one comes with more features.

    • We spent so much time, money and effort fixing it, why not spend some more and upgrade it for another decade of use?

      This is a bad economic arguement. If the costs of an extra 10 years of service outweigh the benefits, then it's not worth it.... regardless of how much money has been pumped into the project up until now.
    • Why not upgrade? (Score:4, Interesting)

      by ashitaka ( 27544 ) on Saturday July 26, 2003 @10:04PM (#6542549) Homepage
      For the same reason you don't put an 80GB ATA133 in that old 486.

      Sometimes it's better to just to get a new machine.

      It *will* be sad when Hubbble burns up. (And don't think that it's ever going to come down nicely. That opportunity was lost with Columbia as others have pointed out.)
  • by Nate Fox ( 1271 ) on Saturday July 26, 2003 @07:42PM (#6542049)
    NASA has long planned to end Hubble's spectacular run and bring it down in 2010 to make way in the budget for the James Webb Space Telescope, scheduled to be launched in 2011.

    Theres a gap there in time where we wont have a telescope up there. this will be the end of the world, as we wont be able to see the asteroid comming at earth in time to send our best deep crust drillers to drop a nuke in it and split it up!
  • If would have been nice if the article explained why it costs so much to maintain and why we have to periodically spacewalk to it. Does it need new batteries? Does it have to get cleaned? Can it not correct it's own orbital decay?

    What's the deal? Anyone know? Seems like if it was mostly self-maintaining, it should cose a whole lot to just keep it up there.
    • by henley ( 29988 ) on Saturday July 26, 2003 @07:58PM (#6542115) Homepage

      Hubble was designed to be serviced, on-orbit, by the Shuttle. This is '70s NASA remember which was juust getting the hang of perpetually self-justifying programs. Why do we need a Shuttle? To service Hubble, of course! Ahh, but why do we need Hubble? To give the Shuttle something to do!

      Rather less cynically, note that the design life[*] of most unattended satellites is 5 years. After that period of time, enough is going to have started going wrong (fading power from radiation and micro-meteorite damaged solar cells is the classic example) that it's just not worth adding extra redundancy into the design up front to cover it (remember that redundancy = mass consumed that can't be used for the primary purpose of the sat.). Hubble has been up nearly 15 years now, and still has 5 years of useful life in it. That's because all of the things that traditionally go wrong - see the solar cells - have been replaced at least once. Also note that not only was the critical design-flaw in the mirror corrected on-orbit by the first Shuttle service mission (turning what would have been a wasted sat. requiring complete replacement and relaunch into a fully-functioning success), but later service missions have replaced components with improved versions, increasing the capabilities of Hubble enormously. It's like there's been 3 Space Telescopes up there, for the cost of... well, let's not go there. NASA's more than capable of making it look like it's cost less than 3 complete new telescopes, I'm sure...

      [*] = as opposed to the actual life which can be much longer, but can't be predicted in advance


      • Hubble was designed to be serviced, on-orbit, by the Shuttle.

        It's actually worse than that. Orbits at altitudes reachable by the Shuttle decay rapidly, because the atmosphere's a little too thick up there - satellites like the Hubble, with big solar arrays, are particularly vulnerable.

        The most important thing that happens on Hubble servicing missions has nothing to do with fixing hardware. The Shuttle catches the Hubble, then fires its maneuvering engines and carries the Hubble up to a higher orbit.

        I know this because my company did some computer modeling for NASA to help them predict how often these reboosts would be needed. The amount of atmospheric drag varies with sunspot activity - increased solar output makes the atmosphere "puff up" and makes orbits decay faster.

        And guess what? The Space Station is in an orbit reachable by the Shuttle, and also has big solar panels, so it needs reboosting by the Shuttle too.
    • Among other things, some of the instruments (I'm thinking of the NICMOS, don't remember whether any others require this) must be cooled by liquid nitrogen in order to prevent interference from IR emitted by the instruments themselves.

      If you think that's bad, COBE had to be cooled by liquid helium.

      You can read more about the instrumentation here [nasda.go.jp].

      More speculatively, I imagine occasional physical adjustment have to be made from time to time too, like replacing lubricants, servicing gyros, replacing ba
  • *sigh* (Score:5, Insightful)

    by gerardrj ( 207690 ) on Saturday July 26, 2003 @07:47PM (#6542069) Journal
    I just find is pathetic that the U.S. can't find $600m to refurb the HST. We're spending about twice that EVERY DAY on operations in Iraq.
    Just pull the troops out two days earlier and there you have it... enough cash to service the Hubble twice!

    My opinion is that the HST should be retrofitted with a small nuclear power source (like those on the Voyager series) and send out of the solar system. But unlike previous missions were the probes were sent past the outer planets, we should send HST perpendicular to the Earth's orbit, so we can look back "down" on ourselves and surrounding stars/planets.

    I can't recall if the solar system plane is about parallel to the galactic plane, but if so this would also give us a tremendous perspective on the galaxy that we haven'y had before. Yea, yea it would take a decade or two to get to a distance that would mean anything astronomically, but it has to happen some time, why not now.
    • Re:*sigh* (Score:5, Informative)

      by henley ( 29988 ) on Saturday July 26, 2003 @08:13PM (#6542162) Homepage

      A few comments on your proposal:

      • The Radio-Isotope-Generator (RTG) power sources on Voyager et al have some significant problems with regard to the political implications of getting them up there. You may or may not recall the farce that surrounded Cassini's launch, and the fears that a launch accident would have spread plutonium dust over the eastern seaboard.
      • Disregarding the above, RTG's aren't a magic bullet. After 10 years in space, Voyager was down to 1/2 the original power. I've got no idea what Hubble's power requirements are, but I wouldn't assume you can just drop a couple o' RTGs in and stop worrying...
      • Rather more serious than this, however, is that Hubble is a big satellite. Over 11 tonnes. 14 times heavier than the Voyager probes, which took the heaviest available launcher (a Titan-IIIc) to throw them out of earth orbit. Short of reviving the Saturn-V, there's not a lot on the shelf that'll get Hubble much out of it's current Low Earth Orbit. Oh, and when it does go out there, most of the optics are likely to be knackered by the transit through the Van Allen belts....
      • The exact mission you're describing - go a ways out there and look back at ourselves - has already been attempted. Lookup Triana aka "Gore-sat" [reston.com] for more details. To summarise: It's a great PR effort but the science is lousy.
    • A decade? Even if the Hubble had a relatively wide-angle lens, it would have to go at least a light-year or two out of the ecliptic to even get Centauri and Sol in the same picture, let alone a significant part of the galaxy. That would take centuries with current technology.
    • Re: too late (Score:3, Interesting)

      by deglr6328 ( 150198 )
      This has already been done [nasa.gov]! (at the request of Carl Sagan in the early 90's)
    • The number is 4B per month.
      • "I just find is pathetic that the U.S. can't find $600m to refurb the HST. We're spending about twice that EVERY DAY on operations in Iraq.

        Just pull the troops out two days earlier and there you have it... enough cash to service the Hubble twice!"
        -gerardrj

        "The number is 4B per month." -glrotate

        While it is ends up that glrotate's information seems to be more correct, I really dislike it when people just assert something as true, while providing no evidence. In the end it just ends up being a 'No

  • by MichaelCrawford ( 610140 ) on Saturday July 26, 2003 @07:52PM (#6542088) Homepage Journal
    Want to try out astronomy for yourself, but don't have the cash for an expensive telescope?

    I've been an avid avid amateur telescope maker [geometricvisions.com] since I was twelve years old. It led to me studying astronomy for a time at Caltech [caltech.edu]. While I'm a programmer now, it's still a very enjoyable and intellectually stimulating hobby.

    While a basic newtonian is a straightforward instrument that can be built by anyone who's good with their hands, telescope making can get as complicated as you want if you're really looking for a challenge. Optical design is still a wide open area of research in mathematics, software engineering, and physics, and some of the more interesting designs take quite a bit of skill to fabricate. That means anyone can make a satisfying telescope, but the hobby will yield a lifetime of interest because there's always new things to learn.

    You can construct your own telescope with a primary mirror of 8 inches in diameter for less than $200. It will take quite a bit of work, but it is enjoyable and meditative work. Grinding mirrors is one of the things I do to relax and relieve the strain of coding all day.

    A good place to start looking for information is the ATM FAQ [atmsite.org]. The procedures for grinding, polishing and figuring are pretty involved - you should buy one of the books from astronomy publisher Willman-Bell [willbell.com].

    There are a number of people and business who sell inexpensive mirror grinding kits. They will come with a glass mirror blank and an assortment of different sizes of abrasive grits. I would recommend asking on the ATM mailing list (that you can find in the FAQ) when you're ready to order your first kit.

    The 8" plate glass kit I bought from Dan Cassaro for my current project set me back $64. When I get done working on the mirror, it will cost me about $35 to have a vacuum coating laboratory aluminize it. Good quality eyepieces cost about $50 - just one will do to start with but it helps to have more.

    While fancy equatorial mountings can be expensive to make, it's possible to make a quite servicable altazimuth mount out of common materials like plywood and a few hand tools.

  • "What the hell is that thing?"
    "It appears to be the mothership."
    "Then what did we just blow up?"
    "The Hubble Telescope."

  • Hubble = rubble!

    Ahahahahahahahahahahahahahhaaaaahaw.

    I crack myself up.
  • That sucks (Score:5, Interesting)

    by Anonymous Coward on Saturday July 26, 2003 @08:02PM (#6542123)
    For everything Hubble has done to further astronomy (and since it was practically the only bright spot of the otherwise maligned space program), they owe it a better end than what they are proposing. To deorbit it and let it burn up with as much thought as one would give to flushing a dead goldfish is just plain wrong.

    It should definitely be retrieved and become a piece in the Air & Space Museum's collection.
    • Sure hubble has done great things for astronomy but it is just a hunk of metal (and other materials).

      I am sure that I still have my first computer somewhere in the loft but that didn't cost me $600 M to keep.

      Wouldn't be much better and more respectfull to the exsisting peice of metal to spend the money you would use preserving it to build a bigger better teliscope. (what happened to the idea of building arrays of teliscopes in orbit?)

      A lot of the things in the air and space museam are replicas anyway
    • Unfortunatly (and I can't remember the source of this), I've heard that even if there were large quantities of gold in orbit, it still wouldn't be cost-effective to bring it back.
  • by Black Parrot ( 19622 ) on Saturday July 26, 2003 @08:16PM (#6542178)


    I don't know exactly how much of my tax money goes toward funding Hubble, but even apart from the science I get a pretty good entertainment value from the the pictures it has produced, such as the wonderful picture of NGC 7742 [nasa.gov] on the APOD page for today.

  • by DanielRavenNest ( 107550 ) on Saturday July 26, 2003 @08:30PM (#6542223)
    Hubble is an overgrown version of a digital camera. As CCDs improve, you eventually want to replace the ones up there with better ones. This has already been done a couple of times, but electronics keeps improving.

    It also has batteries and solar cells that provide power, and these wear out and have to be replaced.

    Hubble needs to point itself at things, and it does so using heavy spinning rotors, which are
    turned one way, and by Newton's Law, Hubble
    turns the other way. There are 5 of these
    "Control Moment Gyros", or CMGs. Being mechanical devices, they wear out and break over time.

    You need 3 out of 5 to be working to point Hubble, and if they have an MTBF of 12.5 years (which is pretty good for a mechanical device), then you need to visit every 5 years and replace 2 to keep Hubble running.

    Hubble has no propulsion and you don't want any until you are ready to kill it. Fluids sloshing in tanks will mess up your pointing of the telescope, and any exhaust from a rocket will contaminate the optical surfaces. When the Shuttle visits, the thrusters are 50-75 feet away, which is much less of a problem than if your booster pack is on the back end of the telescope only 2 feet from the science instruments.

    And yes, IAARS, in fact the first group I worked at at Boeing back in 1981 supplied the graphite/epoxy frame that holds Hubble's mirrors in place.

    Daniel
  • Well, Hubble has been a brilliant program. The big problem with keeping it going is political and economic. If NASA tries to extend the life of Hubble, this will put pressure on delaying the NGST (Next Generation Space Telescope). Plus, operating two separate programs at once is expensive. NASA would probably like a lot of the same people now running Hubble to run NGST. With Hubble still operating, that's hard to do.

    Then there's the question of whether someone else could run it. This could either be a publ
  • US Army (Score:5, Funny)

    by Mark_MF-WN ( 678030 ) on Saturday July 26, 2003 @08:56PM (#6542304)
    Maybe it's time for the US to test some of their cool new weaponry. They must have SOMETHING neat that was designed to take out high altitude stuff. What better chance to prove it's effectiveness? I mean, the Hubble has to come down anyway, so why not give us all a show?
  • by Alethes ( 533985 ) on Saturday July 26, 2003 @09:03PM (#6542332)
    They need to just point the Hubble back to earth and create the worlds best voyeur porn site. They could fund all their other missions with that money.
    • Heh, i've always believed NASA could make some nice side profit by sending porn stars up in space and having ZeroG sex then selling it for some major cash down here.

      I mean, think of the POSSIBILITES. When people ask me why we should go to space I junk all the regular arguments and just say these two magic words "ZeroG Sex." Get's em every time.
  • by levin ( 170168 ) on Saturday July 26, 2003 @09:07PM (#6542341) Homepage
    Why not rename it the Hubbard Space Telescope? Then you can get Hollywood Scientology types to pay big bucks to keep it in the air.
  • As much as I hate saying anything against ANY part of our space exploration, I would have to say that STScI is right behind NASA in being the cause of ossification of science. Thanks to the bureaucracy, the average astronomer has NO chance of receiving observing time on the Hubble, but the members of STScI have gained fame and fortune, thanks to the taxpayers' largesse. They've tied their fortunes to the Hubble, and if it stops, they may have to actually produce! "Faster, better, cheaper" is a good motto
  • There is no reason why we'd need to bring the hubble telescope back to earth. There is a ton of debris in space, there is no reason to bring all of that down, why should we bring the hubble back?
    • Re:no.. (Score:4, Informative)

      by phillymjs ( 234426 ) <slashdot AT stango DOT org> on Saturday July 26, 2003 @10:16PM (#6542592) Homepage Journal
      There is a ton of debris in space, there is no reason to bring all of that down

      Actually, there is. [worldpaper.com] It's a hazard to satellites and orbiting spacecraft. A few years back, one of the shuttles had a small crater made in its windshield when it was hit by an orbiting *paint chip*.

      There's just so much space junk and it's moving so fast, that it's tough if not impossible to safely intercept and capture. NORAD actually tracks and catalogs every piece of it large enough to get a radar return. When a shuttle is up, they constantly monitor its path for errant debris so it can maneuver if necessary. I believe they do the same for the ISS.

      ~Philly
  • Wouldn't it be better to have something like Hubble as a part of the ISS? That way people could be on-hand to repair/upgrade it as necessary, and would save having to have separate missions to both.

    Or is the relatively low orbit of the ISS a problem? I know the Hubble is a lot higher than the ISS.
  • No one, it seems, is really talking about the capabilities of the replacement "Webb" telescope. Shouldn't we be thinking of the Hubble as the 386 that through servicing has had P-II "overdrive" added, but is basically due for replacement with a spiffy new Opteron? We could put a metaphorical new drive in the old one, but that chassis is getting old, and the power supply needs to be upgraded too. At some point, it's better to swap the whole box out.

    The problem is whether the Webb is really going to happ

  • by reallocate ( 142797 ) on Saturday July 26, 2003 @10:44PM (#6542678)
    Plans exist to orbit a replacement telescope, but I don't recall if that project is actually funded.

    In point of fact, however, this illustrates the fundamental unsoundness of U.S. space policy since the premature close of the Apollo project during the Nixon administraton. The shuttle was justified as a way to get to the space statoin amd the space station was justified as a place for the shuttle to go.

    The failure of every administration since Nixon's to provide leadership and a coherent space policy is the reason we are in this mess. The White House should be making space policy and assigning goals to NASA. No one has one that since Kennedy, and it shows.
  • by garyebickford ( 222422 ) <`gar37bic' `at' `gmail.com'> on Saturday July 26, 2003 @10:53PM (#6542717)
    I haven't seen this suggestion here, maybe I missed it.

    The HST does have attitude control jets. Generally those are used just to rotate the HST in various axes. They could be reprogrammed to thrust in pairs on the same side of the system, and thus accelerate rather than rotate it. This would slightly alter the orbit each time. Done at the proper points in the orbit it could gradually 'leapfrog' into a higher orbit with minimal effect on the system or usage.

    This would take much more thruster fuel than it presently carries, so on the next Shuttle visit, they could bring a larger fuel tank and adapters to mount it to the HST. (They might even be able to develop a remote refueling port that could be used by a robotic tender, but that's more complicated.) This would require some research on how to do so without unduly disturbing the center of mass and reprogramming to deal with the different moment of inertia, but it seems not much more complicated than things they've done before like replacing the mirror, or doing the upgrade a couple of years ago. I think (but I'm not an astronomer) that in between thrust events most observations could continue with updated ephemera.

    Another way would be to add a small ion thruster and reaction 'fuel' to the end of the HST and use a small continuous thrust to move it to higher orbit - perhaps even to one of the LaGrange points (L5?). This method would make many types of observations difficult during the entire thrust period of perhaps a year. I speculate that the solar panels would provide enough electrical power to drive the ion thruster(s).

    Either of these methods would be stressing the HST at the same order of magnitude as the existing stabilization systems, and it would seem to me that engineering either of these mods is doable in the time frame for the next Shuttle visit, thereby avoiding a separate, expensive visit.

    While the Web telescope is anticipated to be much better, there are good reasons to have HST still available. The fact that it is such a piece of science history, I would dearly like to see it moved to a place where it is safe from total destruction, like one of the LaGrange points. It might even become a popular sightseeing "flyby" for tourists on the way to the moon. There it could rest and continue to be used until a means of, for example, safely bringing it down to a museum on the moon could be developed in 50 years or so. Letting it burn up in the atmosphere would be too bad.
    • I haven't seen this suggestion here, maybe I missed it.
      You haven't seen it because it's impossible.
      The HST does have attitude control jets.
      The HST does *not* have attitude control jets, because their exhaust would contaminate the mirrors. Hubble uses gyropscopes for pointing and stabilization.
  • by HaloZero ( 610207 ) <protodeka&gmail,com> on Sunday July 27, 2003 @12:00AM (#6542856) Homepage
    ...but it's a telescope, right?

    Why not just weld it (not literally) to the Space Station? I mean... it could be maintained, and, still used. We've got some damned interesting information from that thing in the past, IIRC. Upgrades and fixes would be a lot freaking easier if we didn't have to yank it out of orbit every time. I mean, if it's attached to the station, we know right where it is. Parts could be delivered via shuttle to the space station, so repairs could be done through airlocks there. Wouldn't add TOO much mass to the equation - I mean, the Hubble is no bigger than any of the other modules (it fit in the shuttle...). Also, the downlink and power requirements are easily met.

    So, go ahead, debunk my idea? I know Slashdot is chock-full of certified NASA Engineers. :-p

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