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2004- the Year of Returning to Space
various FR links | 01-31-04 | The Heavy Equipment Guy

Posted on 01/31/2004 5:09:08 AM PST by backhoe

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Testimony of Charles M. Chafer given at Senate Science Committee
Senate Committee on Commerce, Science, and Transportation via SpaceRef ^ | Wednesday, February 18, 2004 | Charles M. Chafer
51 posted on 02/20/2004 12:18:48 PM PST by backhoe (The Lights in the Sky are the Stars--)
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Good News: the Universe May Not Be Dying
Reuters ^ | Fri February 20, 2004 | Maggie Fox
52 posted on 02/20/2004 3:25:41 PM PST by backhoe (--30--)
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Radio Storms on Jupiter
NASA ^ | 02/20/2004 | NASA
Radio Jove

53 posted on 02/21/2004 12:24:36 AM PST by backhoe (The Lights in the Sky are the Stars--)
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Life In The Universe Takes Orders From Space
Science Daily ^ | 2-20-2004 | ASU
54 posted on 02/21/2004 12:43:17 AM PST by backhoe (Just an old Keyboard Cowboy, ridin' the TrackBall into the Sunset...)
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China - Moon fly-by to soar by 2007 (that's 3 years away)
China Daily ^ | February 27, 2004 | uncredited member of the masses

55 posted on 02/27/2004 4:28:13 AM PST by backhoe
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Awesome False-Color Mars Rover Photo - El Capitan Outcrop
http://marsrovers.jpl.nasa.gov/gallery/press/opportunity/20040226a.html ^ | 2/26/2004
56 posted on 02/27/2004 4:59:40 PM PST by backhoe (The Lights in the Sky are the Stars--)
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Commercializing the New Space Initiative
The Space Review ^ | Monday, March 1, 2004 | Jeff Foust
57 posted on 03/01/2004 2:03:09 PM PST by backhoe
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To: backhoe
I was amazed to see my local TV news anchors discuss, and run a report on, the feasability of the space elevator, just a couple of days ago.

I don't think a space elevator is going to happen any time soon, if ever, for one reason: everyone is focusing on the ability to stretch the "elevator" ribbon via a counterbalance extending beyond the geostationary orbital distance, and the amount of energy needed to lift the payload to the geostationary height -- but, it seems that no one is paying any attention to the amount of energy required -- or, the torsional strengh necessary to withstand -- to accelerate the payload to its horizontal (or "circular" or "orbital") speed.

It's not just a matter of lifting yay many pounds yay many miles straight up. That would only be the case if the Earth wasn't spinning. But, it is.

It will take quite a bit of energy to accelerate the payload "sideways" from a relative standstill (IIRC the rotational speed at the equator is about 1,000MPH) to the tens of thousands of miles an hour required to maintain a geostationary orbit.

Sure, it looks like a geostationary satellite isn't moving -- but it actually is moving, and at a very decent clip.

The reverse is also true when descending from orbit. All that rotational speed will have to go somewhere, and the stuff I've seen proposed, i.e., carbon ribbons, have tremendous strength in the "lengthwise stretch" department, but are very weak in any other direction.

Picture an ice ballet skater spinning, with her arms outstretched, and then pulling her arms inward. Notice how much faster she spins, as the rotational energy from her outstretched arms is translated into increased RPM as they move inward?

Now, imagine that her arms are 40,000 miles long, and each hand weighs a few tons, and tell me how much sideways force that "elevator" ribbon will have to absorb (and brake) as the payload, weighing several tons, traveling at several tens of thousands of miles per hour, descends to sea level -- with all of that sideways momentum having to go "somewhere" (i.e., cargo pressed against one wall, payload "car" pushing against the elevator ribbon).

I just can't see it being practical, and I doubt that the proponents have "done the math" on it.

58 posted on 03/01/2004 9:46:31 PM PST by Don Joe (We've traded the Rule of Law for the Law of Rule.)
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Most Distant Galaxy in Universe Detected
Associated Press ^ | Mon Mar 1, 2004 | JOHN LEICESTER

59 posted on 03/02/2004 2:21:08 AM PST by backhoe
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To: Don Joe
I just can't see it being practical, and I doubt that the proponents have "done the math" on it.

You're probably right- what I found remarkable was that a local TV station would even run a story about it- they usually fall into the "if it bleeds, it leads" category.

60 posted on 03/02/2004 2:50:40 AM PST by backhoe (Another artifact left over from The Decade of Fraud(s)...)
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NASA News Conference on Mars~~~ Live Thread
Fox | March 2 2004
61 posted on 03/02/2004 3:14:32 PM PST by backhoe
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ASU professor's theory of Martian water proves correct
Casa Grande Valley News (Arizona) ^ | 3/4/04
62 posted on 03/04/2004 1:41:15 PM PST by backhoe
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Save Hubble Resolution Introduced in House
Space.com via Yahoo ^ | 3/4/04 | Brian Berger
63 posted on 03/05/2004 9:54:26 AM PST by backhoe (Just an old Keyboard Cowboy, ridin' the TrackBall into the Sunset...)
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Hubble's deepest view ever unveils earliest galaxies (Ultra-deep field)
SpaceFlight Now ^ | March 9, 2004 | unknown author
64 posted on 03/09/2004 12:47:19 PM PST by backhoe (Just an old Keyboard Cowboy, ridin' the TrackBall into the Sunset...)
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Spirit Looks Down Into Crater After Reaching Rim - and - A Deep Dish for Discovery
NASA - JPL ^ | 03-11-2004 | NASA/JPL
65 posted on 03/12/2004 3:14:29 AM PST by backhoe (Just an old Keyboard Cowboy, ridin' the TrackBall into the Sunset...)
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Mars Rover Night Sky Photography
NASA MER Web Site ^ | 3/11/04 | Elk Grove Dan

66 posted on 03/12/2004 3:39:49 PM PST by backhoe (Just an old Keyboard Cowboy, ridin' the TrackBall into the Sunset...)
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NASA Schedules News Briefing About Unusual Solar Object
NASA ^ | March 12, 2004 | NASA
67 posted on 03/14/2004 11:26:50 AM PST by backhoe (--30--)
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Whispers in the Echo Chamber - Why the media says the space plan costs a trillion dollars
The Space Review ^ | Monday, March 22, 2004 | Dwayne A. Day
68 posted on 03/22/2004 4:44:11 PM PST by backhoe (--30--)
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X-43A test a 'grand slam'(Interesting Details)
Valley Press ^ | March 28, 2004 | ALISON GATLIN
69 posted on 03/28/2004 2:02:25 PM PST by backhoe
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NASA Scores Success in Space Travel 'Holy Grail'
Reuters ^ | Mon, Mar 29, 2004
70 posted on 03/29/2004 11:46:12 AM PST by backhoe (--30--)
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The Wrong Stuff: Let robots, not men explore space
New York Review of Books ^ | April 8, 2004 | Steve Weinberg
71 posted on 03/29/2004 4:36:38 PM PST by backhoe (--30--)
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Now Nasa looks to change Mars into a garden of Earthly delights
Guardian ^ | March 28, 2004 | Robin McKie
72 posted on 03/31/2004 4:47:11 AM PST by backhoe
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Panel proposes overhaul of NASA
Houston Chronicle ^ | May 5, 2004 | MARK CARREAU
73 posted on 05/05/2004 4:34:37 AM PDT by backhoe (--30--)
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Bush's pragmatic step-by-step guide to space
Houston Chronicle ^ | May 31, 2004 | JOHN H. MARBURGER III, science adviser to the president


74 posted on 05/31/2004 3:10:22 AM PDT by backhoe (--30--)
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LIVE THREAD: Spaceship One Launch
6/20/04


75 posted on 06/21/2004 3:33:00 PM PDT by backhoe (Just an old Keyboard Cowboy, ridin' the Trackball into the Sunset...)
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  SpaceShipOne has made Space History 
 
 
Ansari X Prize 2nd Launch Live Thread - Launch at 6:30 PDT
http://www.freerepublic.com/focus/f-news/1234296/posts?page=103#103
 

 Repeat spaceflight lands X Prize SpaceShipOne's builders now look to their next goal

 Gordon Cooper Dies at 77

 Annual Competition for Public Space Flight

 Private Space Triumph!

76 posted on 10/05/2004 3:52:38 PM PDT by backhoe (Just a Keyboard Cowboy, ridin' the Trackball into the Dawn of Information...)
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 Victory Will Jump-Start Space Plans
 Most major space backers in Congress win reelection

77 posted on 11/05/2004 2:58:18 AM PST by backhoe ("We met at Dawn- and destiny Preveiled...")
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 European Craft on Saturn Moon Finds Tantalizing Signs of Liquid -- The fact that Titan has a hydrocarbon atmosphere should point out the obvious to everyone here: Hydrocarbons (i.e. petrochemicals) DO NOT come from "fossils". They are geochemical in nature, not dependent upon former biological activity. Earth is going to continue making oil, as long as the tectonic plates continue to subduct, and as long as we have a molten core.
 
  Cassini - Huygens Pictures From Surface Of Titan
 
 First Images from Titan
 
 Huygens Probe Returns First Images of Titan's Surface
 
 CURRENT SOHO IMAGES
 
  European Probe Lands on Saturn's Moon -- Active thread here:
http://www.freerepublic.com/focus/f-news/1320689/posts
 
 Spitzer Sees the Aftermath of a Planetary Collision
 
 Opportunity Spots Curious Object On Mars
 
 Milky Way's Center Packed with Black Holes
 
 Spacecraft launched on mission to smash comet
 
 Astronomers Confident: Planet Beyond Solar System Has Been Photographed
 
 SpaceShipTwo Won't Be Like SpaceShipOne (awesome Rutan quote on taking risks)
 
 Bush Plans to Boost Commercial Human Space Flight
 
 Cowboys, miners, farmers, and hoteliers
 
 Rover hits one-year mark on Mars
 
 Mining The Moon
 
 Three Dozen New Galaxies Are Found in Nearby Space
 
 On to the Moon, and to Mars, via von Braun

78 posted on 01/15/2005 12:27:18 AM PST by backhoe (-30-)
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Latest Titan pictures now available.

79 posted on 01/15/2005 7:36:22 AM PST by backhoe (-30-)
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LINK LISTING - Space Propulsion Techniques and Technologies

80 posted on 01/24/2005 3:57:14 PM PST by backhoe (-30-)
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 Fossett makes history: Pilot is first person to fly solo nonstop round-the-world
 Fossett Set to Make Aviation History (Live Thread)
 
 
 
 Mars rover sets new distance records
 

81 posted on 03/03/2005 1:10:39 PM PST by backhoe (-30-)
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Great Collection of SPACE Links

82 posted on 03/09/2005 2:19:35 PM PST by backhoe (-30-)
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