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• Space_debris abstract "Space debris, also known as orbital debris, space junk, and space waste, is the collection of defunct objects in orbit around Earth. This includes everything from spent rocket stages, old satellites, fragments from disintegration, erosion, and collisions. Since orbits overlap with new spacecraft, debris may collide with operational spacecraft.As of 2009, about 19,000 pieces of debris larger than 5 cm (2.0 in) are tracked, with another 300,000 pieces smaller than 1 cm below 200 km altitude. For comparison, the International Space Station orbits in the 300–400 km range and both the 2009 collision and 2007 antisat test events occurred at between 800 and 900 km.Most space debris is smaller than 1 cm (0.39 in), including dust from solid rocket motors, surface degradation products such as paint flakes, and coolant released by RORSAT nuclear-powered satellites. Impacts of these particles cause erosive damage, similar to sandblasting. Damage can be reduced with "Whipple shield", which, for example, protects some parts of the International Space Station. However, not all parts of a spacecraft may be protected in this manner, e.g. solar panels and optical devices (such as telescopes, or star trackers), and these components are subject to constant wear by debris and micrometeoroids. The flux of space debris is greater than meteroids below 2000 km altitude for most sizes circa 2012.Decreasing risk from space debris larger than 10 cm (3.9 in) is often obtained by maneuvering a spacecraft to avoid a collision. If a collision occurs, resulting fragments over 1 kg (2.2 lb) can become an additional collision risk.As the chance of collision is influenced by the number of objects in space, there is a critical density where the creation of new debris is theorized to occur faster than the various natural forces remove them. Beyond this point, a runaway chain reaction may occur that would rapidly increase the number of debris objects in orbit, and therefore greatly increase the risk to operational satellites. Called the "Kessler syndrome", there is debate if the critical density has already been reached in certain orbital bands.A runaway Kessler syndrome would render a portion of the useful polar-orbiting bands difficult to use, and greatly increase cost of space launches and missions. Measurement, growth mitigation and active removal of space debris are activities within the space industry today.".
• Space_debris thumbnail Debris-GEO1280.jpg?width=300.
• Space_debris wikiPageExternalLink 1971NASSP.267..595K.
• Space_debris wikiPageExternalLink books?id=FoSOD7fRdjA.
• Space_debris wikiPageExternalLink books?id=q0qVc8dQrpgC&pg=PA48.
• Space_debris wikiPageExternalLink SOCRATES.
• Space_debris wikiPageExternalLink ODMediaBriefing28Apr09-1.pdf.
• Space_debris wikiPageExternalLink hw6.html.
• Space_debris wikiPageExternalLink IAR_95_Document.pdf.
• Space_debris wikiPageExternalLink ODQNv12i3.pdf.
• Space_debris wikiPageExternalLink ODQNv12i4.pdf.
• Space_debris wikiPageExternalLink Collision%20Frequency.pdf.
• Space_debris wikiPageExternalLink Critical%20Density%201991.pdf.
• Space_debris wikiPageExternalLink CriticalNumberofSpacecraftinLow.pdf.
• Space_debris wikiPageExternalLink KesSym.html.
• Space_debris wikiPageExternalLink SourcesofOrbitalDebris.pdf.
• Space_debris wikiPageExternalLink debris-basics.html.
• Space_debris wikiPageExternalLink ep-82-space-junk.
• Space_debris wikiPageExternalLink earth-ring-dynamics.htm.
• Space_debris wikiPageExternalLink GetTRDoc?AD=ADA331517&Location=U2&doc=GetTRDoc.pdf.
• Space_debris wikiPageExternalLink space.htm.
• Space_debris wikiPageExternalLink debris.html.
• Space_debris wikiPageExternalLink SEMCIL05VQF_0.html.
• Space_debris wikiPageExternalLink R43353.pdf.
• Space_debris wikiPageExternalLink United%20States%20Space%20Surveillance%20Network.
• Space_debris wikiPageExternalLink openbook.php?record_id=13244.
• Space_debris wikiPageExternalLink www.orbitaldebris.jsc.nasa.gov.
• Space_debris wikiPageExternalLink www.pacaspacedebris.com.
• Space_debris wikiPageExternalLink 9783540254485.htm.
• Space_debris wikiPageExternalLink us-space-debris-idUSTRE7805VY20110901.
• Space_debris wikiPageExternalLink decay.php.
• Space_debris wikiPageExternalLink article.cfm?id=space-age-wasteland.
• Space_debris wikiPageExternalLink index.html.
• Space_debris wikiPageExternalLink 8.
• Space_debris wikiPageExternalLink space_debris.asp.
• Space_debris wikiPageExternalLink space-debris-illustrated-the-problem-in-pictures.
• Space_debris wikiPageExternalLink AC105_720E.pdf.
• Space_debris wikiPageID "266344".
• Space_debris wikiPageRevisionID "606448826".
• Space_debris hasPhotoCollection Space_debris.
• Space_debris subject Category:Astronomical_controversies.
• Space_debris subject Category:Litter.
• Space_debris subject Category:Near-Earth_objects.
• Space_debris subject Category:Space_debris.
• Space_debris subject Category:Space_hazards.
• Space_debris subject Category:Spaceflight.
• Space_debris type CausalAgent100007347.
• Space_debris type Danger114541044.
• Space_debris type Hazard114541852.
• Space_debris type Near-EarthObjects.
• Space_debris type Object100002684.
• Space_debris type PhysicalEntity100001930.
• Space_debris type SpaceHazards.
• Space_debris comment "Space debris, also known as orbital debris, space junk, and space waste, is the collection of defunct objects in orbit around Earth. This includes everything from spent rocket stages, old satellites, fragments from disintegration, erosion, and collisions. Since orbits overlap with new spacecraft, debris may collide with operational spacecraft.As of 2009, about 19,000 pieces of debris larger than 5 cm (2.0 in) are tracked, with another 300,000 pieces smaller than 1 cm below 200 km altitude.".
• Space_debris label "Basura espacial".
• Space_debris label "Detrito espacial".
• Space_debris label "Detrito spaziale".
• Space_debris label "Débris spatial".
• Space_debris label "Kosmiczne śmieci".
• Space_debris label "Ruimteschroot".
• Space_debris label "Space debris".
• Space_debris label "Weltraummüll".
• Space_debris label "Космический мусор".
• Space_debris label "مخلفات فضائية".
• Space_debris label "スペースデブリ".
• Space_debris label "太空垃圾".
• Space_debris sameAs Kosmické_smetí.
• Space_debris sameAs Weltraummüll.
• Space_debris sameAs Basura_espacial.
• Space_debris sameAs Espazioko_zabor.
• Space_debris sameAs Débris_spatial.
• Space_debris sameAs Sampah_angkasa.
• Space_debris sameAs Detrito_spaziale.
• Space_debris sameAs スペースデブリ.
• Space_debris sameAs 우주_쓰레기.
• Space_debris sameAs Ruimteschroot.
• Space_debris sameAs Kosmiczne_śmieci.
• Space_debris sameAs Detrito_espacial.
• Space_debris sameAs m.01nfs7.
• Space_debris sameAs Q275450.
• Space_debris sameAs Q275450.
• Space_debris sameAs Space_debris.
• Space_debris wasDerivedFrom Space_debris?oldid=606448826.
• Space_debris depiction Debris-GEO1280.jpg.
• Space_debris isPrimaryTopicOf Space_debris.