SPACE JUNK
March 25, 2012
SPACE JUNK
The following resources were used in writing this document:
- “Scientists Battle Space Debris Threat”: CBS News, 23 April 2011
- “Space Debris”: Wikipedia
- “Space Junk Endangers NASA Satellites”: Elizabeth Montalbano, Information Week, 2 September 2011
- “Space Junk Janitors Should Sweep Up 5 Dead Satellites”: Biology & Nature, 27 February 2012
- “Space Junk to Triple by 2030”: Lenord Davis, Space.com, 9 May 2011
I can’t stand dirt. Dirty house, dirty car, dirty office, and I am making some changes. Fortunately, my wife is a “neatnick”. She also—CAN’T STAND DIRT. To further demonstrate the point, one evening, just before sundown, she looked through our den windows towards the setting sun and pronounced “we WILL clean these filthy windows inside and outside tomorrow”. I felt her “pane”. (Pardon the clever play on words!) Dirt is one thing, but I’m OK with a little clutter. I have several editions of Machine Design, Design News, Science and Technology, etc. sitting around waiting on the spirit to move me towards picking them up to read. The older ones I consider collector’s items. This is perhaps the only way I cannot be considered a hoarder.
The tiny blue dot we live on does have a significant problem with clutter SPACE JUNK– I will demonstrate as follows:
The digital photograph above shows the approximate position of debris remaining as a result of exploits in space, both ours and other countries, having the technology to launch rockets that carry payloads. Perhaps a more enlightening JPEG, given below, will be more helpful and further illustrate the issue faced by NASA and other space-related agencies. Please keep in mind all objects are moving. None are stationary; consequently, any depiction of position must be an estimate of position.
It has been estimated by Hugh Lewis from The University of Southampton that over this decade, there could be as much as a fifty percent (50%) increase in debris. Already, the International Space Station has had to fire thrusters to avoid moving “garbage” orbiting earth. The result would have been disastrous had this action not been taken. Some experts from NASA and within several university systems state we have already reached the “tipping point” and corrections would be virtually impossible and remarkably expensive. NASA estimates there are at least 500,000 pieces of debris orbiting earth and some of that debris is moving at 17,500 miles per hour. Of course, any “strike” at these speeds could produce life-threating damage to personnel and systems. Damage such as the one shown below could absolutely destroy delicate equipment and seriously injure, if not kill, astronauts.
The overwhelming number of particles are smaller than one centimeter; i.e., 0.39 inches, but others are of considerable size. Estimates are as follows:
- 1,500 pieces of debris weighing more than 100 Kg or 200 pounds
- 19,000 pieces of debris measuring between 1 to 10 centimeters; 3.9 inches
- An unestimated number of particles, mostly dust and paint “chips” resulting from collisions that have occurred with larger objects also orbiting. Some “guesses” put that number into the millions.
For the most part, the debris can be categorized as follows:
- Jettisoned garbage from manned spacecraft, purposefully disposed of into lower earth orbit
- Lost equipment; i.e. cameras, tools, measuring devices, fabric hold-down straps, nuts, bolts, cotter pins, etc.
- Debris from collisions tearing apart structures either jettisoned or lost
- Rocket boosters that orbit yet remain in space. Some, over time, experience decaying orbits, eventually falling to earth.
- Satellites that no longer function but still orbit in LEO (Low Earth Orbit) or HEO (High Earth Orbit). Generally satellites operate between 435 to 800 miles above the earth. When these satellites “die”, they do not accomplish reentry but simply stay aloft as dormant objects. Think of the number of telecommunication devices now orbiting the earth. Most will eventually fade and no longer fulfill their purpose, being replaced with newer technology.
With an ever increasing number of launches, engineers and scientists are designing into their products, systems that will provide for ultimate reentry when that system or component performs its function. Let’s assume a satellite has performed properly for nine years but now is dormant due to programmed obsolescence. What if, pulse jets could fire altering trajectory and orbit so reentry could be possible? If that reentry could be a controlled, one “chunk” of debris would be eliminated; consequently, eliminating possible damage to other orbiting bodies or future launches. This is the current mind-set being explored.
With at least fifty nations participating within the space environment, the amount of debris can only lessen but not be eliminated. At the present time, over 20,000 pieces of debris are being tracked from facilities such as the one below:
Facilities such as this can at least estimate collisions and, more importantly, any debris that may be in a decaying orbit that will eventually create reentry into earth’s atmosphere. Over the past ten to fifteen years several large pieces of debris have reentered although most fall into our oceans or uninhabited land. It becomes ever so critical to remain aware of location to preclude injury on the ground or provide successful future launches. Several government agencies, as well as universities, have undertaken programs to explore methodologies to reclaim or at least deflect debris that might be potentially dangerous. Monetary estimates, technical risk and overall complexities of design are significant, and we seem to be a long way from even mounting demonstration programs that will indicate possible success. This is one area that will be fascinating to watch over the next twenty years. Stay tuned.
May 11, 2015 at 17:04
Can you tell us more about this? I’d love to find out more details.
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May 11, 2015 at 17:55
Hello WordPress. This topic is fascinating to me. Over the years, our country and others, has launched various rockets carrying satellites, probes, spy-ware, etc into outer space. They reached orbit and so did the ‘junk” that got them there. Spent rockets, loose nuts, bolts, metal pieces, etc still circle the Earth just as they did after launch. Some have decaying orbits and will fall back to Earth. Some won’t. NASA has a fabulous web site dedicated to space junk. You might want to take a look.
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April 11, 2015 at 11:23
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publish more about this topic, it might not be a taboo subject but
usually people do not talk about these subjects. To the next!
All the best!!
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May 18, 2015 at 19:57
Hello Container–Space Junk is a very popular subject and one I really learned researching. I had absolutely no idea as to how much “stuff” is floating above our heads. Thank you so much for your very kind comments AND I really appreciate you logging on to take a look at my posts. Take care. B.
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March 30, 2015 at 18:23
Hello Shorty 2115i, Thank you so much for your very kind comments. I do have difficulties when starting but I follow one process discovered some years ago: 1.) Chose a topic–In my case a STEM subject 2.) Make a brief “mind-map” of where you want to start with the major points noted and where you want to end, 3.) START, just start writing, 4.) Edit. Some times before I post I have three of four edits. Not uncommon for me, and then 5.) Let it “sit” for a couple of hours then re-read. This works for me. Again, many thanks for taking a look. Bob J.
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January 29, 2014 at 11:11
Hello Michael–Space Junk was a real eye-opener for me. I had no idea we are surrounded by “stuff”–tons of “stuff”. Thank you for taking a look and please come back.
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January 19, 2014 at 12:33
Hello Baby Chew Toys-I really appreciate you taking a look. You would not believe the number of favorable comments I have received from this post. Apparently readers really enjoy the topic. I was absolutely amazed when I read the information from NASA. I had no idea our little blue planet was surrounded by floating “junk”. Really an eye-opener. Again, many thanks and take care.
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January 5, 2014 at 18:18
Hello Sharyn–Thank you so much for your kind comments. I certainly appreciate you taking the time to read my posting and hope they provide “value-added”. Take care. Bob
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June 27, 2013 at 19:38
Hello Free Amazon–Space Junk was one of my favorite posting. I thought it was absolutely fascinating and I had no idea we had so much “stuff” up there. Really happy you enjoyed the post. Please do come again.
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May 26, 2013 at 17:00
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March 6, 2013 at 12:46
Hello Layne–Thank you so much for your comments. I really try to keep my posting interesting and relavent. Hope I have done so in this case. Please come again.
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March 3, 2013 at 15:09
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March 6, 2013 at 12:58
This one was fascinating to write and really useful. We have seen over the past few day some of that “junk” come home when their orbits decayed. Scary stuff. Thank you for taking a look and please come again. B
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March 24, 2013 at 15:44
Space junk is one of my favorite and very interesting to write about. Thank you so much for taking a look.
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February 16, 2013 at 10:23
Space junk was one of my favorite posting and (to me ) a fascinating article. This week, as you know, our little planet experienced a “near miss”. A “heavenly body” fell into our atmosphere doing considerable damage to infrastructure in Russia. Over 100 people were injured due to flying glass and other building materials. Space junk took on another meaning to me as a result of this.
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Hello Lida–It is a free Word Press theme called Emir. I think the background fits my postings and highlights text and graphics. Please take a look and thanks for your visit. Please come again.
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December 5, 2012 at 20:17
Many thanks and I’m certainly happy you enjoyed it. Space Junk is a fascinating subject and one I discovered quite by accident. ( Maybe those are the best kind.) Take care. B.
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November 13, 2012 at 17:54
specjalista ds — This one was fun to write but definitely too time. A great deal of information from NASA is available relative to this subject. Take care. Bob
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November 12, 2012 at 17:46
Hello xataka, I have been blogging for about 2 years now. Thank you for the very very kind comments. I certainly look forward to hearing from you again and thank you so much for taking a look. Bob
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April 11, 2012 at 17:12
Hello Alyssa, I have a Motorola Atrix and have noticed the very same thing. At any rate, I really appreciate you taking a look at my blog and certainly hope you will be a “frequent flyer” I really try to write about interesting topics AND try to infuse some diversity into my work. I’m a mechanical engineer by profession and writing is a real challenge–but I love it. Again,many thanks for taking time to take a look.
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April 9, 2012 at 16:37
Hello Ninfa, Thank you so much for taking a look at my post. I found this subject to be most fascinating. Apparently space junk has been for some time a real concern to NASA and other space agencies. It will continue to be a real problem until we design around it. Take care. Bob
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April 9, 2012 at 16:38
Hello Derrigo, I really appreciate the kind words and an overjoyed that you like my posts. Really appreciate your comments and please keep reading. Bob
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