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Topic: Meteor


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In the News (Fri 17 Nov 17)

  
  Leonid MAC '99 - FACTS on meters and meteor showers
Meteors are better known as "shooting stars": startling streaks of light that suddenly appear in the sky when a dust particle from outer space evaporates high in the Earth's atmosphere.
For example, a Leonid meteor of magnitude +5, which is barely visible with the naked eye in a dark sky, is caused by a meteoroid of 0.5 mm in diameter and weights only 0.00006 gram.
The color of a meteor is an indication of its composition and the excitation temperature: sodium atoms give an orange-yellow light, iron atoms a yellow light, magnesium a blue-green light, calcium atoms may add a violet hue, while silicon atoms and molecules of atmospheric nitrogen give a red light.
leonid.arc.nasa.gov /meteor.html   (0 words)

  
  The Gloster Meteor
Meteor pilots were keen to test their aircraft against the Messerschmitt Me-262 jet fighter, but at least initially they had orders not to fly beyond enemy lines lest one of their aircraft be shot down and examined.
Meteors were fired on anyway, but none were lost to "friendly fire", though there were losses due to fatal flight accidents.
The Meteor seemed to be no match for the MiG-15, though Australian pilots protested that they might have done much better had they been trained for air-to-air combat instead of ground support, but by the end of 1951 the Meteor had been relegated to the ground-support role.
www.vectorsite.net /avmeteor.html   (7242 words)

  
  Meteor - Wikipedia, the free encyclopedia
A meteor is the visible path of a meteoroid that enters the Earth's (or another body's) atmosphere, commonly called a shooting star or falling star.
A very bright meteor may be called a fireball or bolide.
Meteor radars can measure atmospheric density and winds by measuring the decay rate and Doppler shift of a meteor trail.
en.wikipedia.org /wiki/Meteor   (641 words)

  
 MSN Encarta - Meteor
Meteor, in astronomy, small solid body known as a meteoroid that enters a planet's atmosphere from outer space and is raised to incandescence by the friction resulting from its rapid motion.
Brilliant meteors, known as fireballs, occur singly and generally consist of a luminous head, followed by a cometlike train of light that may persist for several minutes; some, called bolides, have been seen to explode with a sound like thunder.
Most meteors are dissipated in flight and fall to the earth as dust; a meteor that reaches the surface of the earth or another planet is called a meteorite.
encarta.msn.com /encyclopedia_761558590/Meteor.html   (211 words)

  
 Meteor (satellite) - Wikipedia, the free encyclopedia
The Meteor satellites were designed to monitor atmospheric and sea-surface temperatures, humidity, radiation, sea ice conditions, snow-cover, and clouds.
Meteor 2-21/Fizeau is the twenty-first and last in the Meteor-2 series of Russian meteorological satellites launched in 1993.
Meteor 3-5 is usually the (Northern Hemisphere) "summer" satellite while 2-21 is in operation for approximately the half-year centered on winter.
en.wikipedia.org /wiki/Meteor_(satellite)   (990 words)

  
 British Astronomical Association - Meteor Section
Meteor work is not a competition, and conscious or unconscious 'doctoring' of observations is worse than useless, and indeed misleading.
Estimation of meteor magnitude is largely subjective, since the meteor is rarely present long enough to enable very accurate visual photometry; it is a remembered impression that is compared with the stars.
Momentary meteor trains are generally likened in appearance to the vapour wake of a jet aircraft, and are only left by about a quarter of all meteors.
www.britastro.org /meteor   (3303 words)

  
 Meteors and Meteor Showers
Further, during meteor showers (which usually last a few days), the majority of the meteors appear to come from a particular point in the sky, called the radiant of the shower.
That meteors in meteor showers appear to radiate from a single point in the sky is an optical illusion, as illustrated in the figure on the right.
Meteor showers often vary in intensity from year to year, presumably reflecting details of encountering the orbit of the parent comet.
csep10.phys.utk.edu /astr161/lect/meteors/showers.html   (0 words)

  
 Meteor - Beyond Visual Range Air to Air Missile (BVRAAM)
Meteor is a new concept in air to air weapons, employing advanced air breathing motor technology and the latest electronics to deliver optimum combat performance.
Meteor is a new concept in air to air weapons, employing advanced air breathing motor technology and state of the art electronics to provide optimum performance against increasingly complex threats.
Meteor will be fitted with a solid propellant variable flow ducted ramjet which the Meteor partners see as essential in delivering the performance characteristics necessary to meet the threat.
www.globalsecurity.org /military/world/europe/bvraam.htm   (1633 words)

  
 StarDate Online | 2007 Meteor Showers and Viewing Tips
An increase in the number of meteors at a particular time of year is called a meteor shower.
Meteor showers are named by the constellation from which meteors appear to fall, a spot in the sky astronomers call the radiant.
When a meteor appears, it seems to "shoot" quickly across the sky, and its small size and intense brightness might make you think it is a star.
stardate.org /nightsky/meteors   (667 words)

  
 Meteor missiles, air defence system developped by MBDA   (Site not responding. Last check: )
METEOR offers a quantum leap in performance and will be the standard by which all other Air-to-Air missiles will be judged.
METEOR will engage air targets autonomously (whether fighters, bombers, transport aircraft, AWACS or cruise missiles) by using its active radar seeker by day or night and in all weather or dense electronic warfare environments.
METEOR was ordered by the UK MoD and five other European nations (France, Germany, Italy, Spain and Sweden) to meet their future Air-to-Air requirements.
www.mbda.net /site/FO/scripts/siteFO_contenu.php?lang=EN&noeu_id=123   (314 words)

  
 Meteor Scatter
The meteors Zenithal Hour Rate (ZHR) being highly variable depending the shower, the type of meteor (sporadic or not) and the time of the day, contacts are privileged during the periods of high ZHR.
Although meteors measure less than 1 mm and are in general too small to be detected, their ionization trail produces a strong echo that can be heard with radio amateur receiver.
Meteor Observation at the Observatory of the University of Ghent (B)
www.astrosurf.org /lombry/qsl-meteor-scatter.htm   (2548 words)

  
 Meteor Shower Photographs   (Site not responding. Last check: )
One way to observe meteors is to wait for a meteor shower; we have not always had the best luck with meteor showers (sometimes the number of meteors has been less than expected, sometimes the weather has not cooperated).
Meteors can occur at any time of year and do not need to be associated with a meteor shower.
Meteors not associated with a shower are called sporatics; over the years we have observed many sporatics, however it requires some luck (or a lot of determination) to capture sporatics on film.
www.umich.edu /~lowbrows/astrophotos/meteors   (293 words)

  
 Glossary | International Meteor Organization   (Site not responding. Last check: )
The positional accuracy is almost as high as that of photographic observations and the faintest meteor magnitudes are comparable to visual or telescopic observations depending on the used lens.
Visual observations are used to monitor major meteor showers, sporadic activity and minor showers down to a ZHR of 2.
The number of shower meteors per hour one observer would see if his limiting magnitude is 6.5mag and the radiant is in his zenith.
www.imo.net /glossary   (1047 words)

  
 StarDate Online | 2007 Meteor Showers and Viewing Tips
An increase in the number of meteors at a particular time of year is called a meteor shower.
Meteor showers are named by the constellation from which meteors appear to fall, a spot in the sky astronomers call the radiant.
When a meteor appears, it seems to "shoot" quickly across the sky, and its small size and intense brightness might make you think it is a star.
www.stardate.org /nightsky/meteors   (0 words)

  
 Delta Aquarids
Although the motion seems backward with respect to the normal eastward movement of meteor radiants, the Author believes the former radiant represents the true Southern Delta Aquarids, while the latter radiant is either a combination of both the southern and northern streams or a conglomeration of several streams within the Aquarid-Capricornid complex.
Terent'eva suggested this accounted "for the peculiar general appearance of the shower meteors which are sharp, show no wakes, and give off no sparks." Several visual and photographic radiants were studied and the northern and southern radiants were clearly apparent, with their average radiants for July 29 being RA=334.5°, DEC=-5.4° and RA=338.5°, DEC=-16.9°, respectively.
Using all available double-station meteor photographs, they found that the southern stream was essentially compact around the time of maximum, but then proceeded to become more diffuse, especially in right ascension, until the compact northern radiant became active about mid-August.
www.meteorshowersonline.com /showers/delta_aquarids.html   (0 words)

  
 AMS Meteor Showers page
Meteors seen 45 to 135 degrees from the radiant are moving in a more parallel direction to the observer.
Sporadic meteors are those random meteors not associated with a particular shower; they are the random detritus left over from the creation of the solar system or are old dispersed debris not recognizable today as shower meteors.
Meteor activity is best seen in the absence of moonlight so showers reaching maximum activity when the moon is less than 10 days old or more than 25 are much more favorably observed than those situated closer to the full moon.
www.amsmeteors.org /showers.html   (2704 words)

  
 Leonid Meteor Shower 2006 -- When, Where, and Why - Planetary News | The Planetary Society
However, unlike a typical meteor shower, astronomers are predicting an unusual "outburst" of meteor activity late November 18 - early November 19 (the date it occurs depends on where you live).
Traditionally, the meteors that make up this shower are much smaller and therefore fainter when they hit Earth's atmosphere and burn up.
Meteor showers offer a great excuse to sit outside and enjoy nature -- just be sure to pack warm clothes, these November nights get chilly.
www.planetary.org /news/2006/1113_Leonid_Meteor_Shower_2006__When.html   (528 words)

  
 Meteor
Meteor Porcelain Tile, an exclusive collection of full-mass porcelain stoneware for floor and wall, opens the doors to the new Millennium.
Meteor is an outstanding choice for commercial and residential areas.
Meteor porcelain tiles from Florida Tile have a very dense low absorptive body, which inhibits the penetration of contaminants and therefore is easily maintained.
www.floridatile.com /ProductStuff/meteor.htm   (290 words)

  
 Meteor Downs TWA Flight 800   (Site not responding. Last check: )
Meteor scientists have stated a meteor approaching the observer at a grazing incidence because of its increasing apparent altitude over the horizon, will give the impression to the observer that is moving upward.
When meteors come into the atmosphere you may see a streak* they naturally are harder to see in daylight (it was daylight at Flight 800's altitude) as they hit the denser air they most frequently explode referred to as a bolide.* The American Meteor Society calls a very bright meteor a fireball.
Even though a meteor played a role in the downing of Flight 800, no one should be unduly worried that such an event is likely to happen again in the near future.
www.icstars.com /Flight800/TWAflt800Long.html   (5052 words)

  
 Railway Technology - Paris Metro Meteor Project New Automated Line
The Meteor name comes from the line's direction, east to west (est-ouest), and is derived from the project's full name, Metro Est-Ouest Rapide.
Meteor was designed to relieve existing Metro lines of around 8,000 passengers per hour in each direction.
Meteor is now complete, and RATP is turning its attention to the rest of the network, including a major ambition to role out automated operation across the whole system, starting with Line 1.
www.railway-technology.com /projects/meteor   (1357 words)

  
 meteor
More meteors are visible after midnight because the earth's rotation has then positioned the observer's part of the earth in the direction of the earth's motion about the sun.
Meteors and Meteorites - The term meteor for what is usually called a shooting star bears an unfortunate resemblance to the...
The Perseids - A meteor shower is an increase in the number of meteors observed in a particular part of the sky.
www.infoplease.com /ce6/sci/A0832898.html   (513 words)

  
 Meteor City
Meteor City was the last to close and the only one to re-open.
Meteor City was built in 1938, adopting a name to capitalize on the nearby Meteor Crater.
Meteor City was the 13th landmark and the 4th along Route 66 which the hotel chain restored in its Save-A-Landmark program.
www.doney.net /aroundaz/route66/meteorcity.htm   (605 words)

  
 Alpha Aurigids
The meteors possessed an average magnitude of 2.62, while 74% of those brighter than magnitude 3.5 left trains.
He added that the strong 1935 shower was probably due to an isolated meteor group in the comet's orbit.
The meteors ranged in brightness from magnitude -4 to +4, with an average of +0.5.
meteorshowersonline.com /showers/alpha_aurigids.html   (0 words)

  
 BBC - Science & Nature - Space - Meteor Showers
Because meteors move across the sky so fast, there is no point in trying to see them through a telescope.
Meteor showers are one of the few astronomical phenomena which are best seen with the naked eye.
Meteor showers are named after the constellation from which they appear.
www.bbc.co.uk /science/space/solarsystem/meteors/index.shtml   (374 words)

  
 Meteor Streams
Meteor streams are groups of meteoroids originating typically from dust grains ejected from comets.
In addition to the name of the meteor stream and time of peak activity, the associated parent body (where known) is also shown.
This list of meteor streams and peak activity times are based on data from the International Meteor Organization while the parent body associations are from Gary Kronk's book, METEOR SHOWERS: A Description Catalog, Enslow Publishers, New Jersey, ISBN 0-89490-071-4.
ssd.jpl.nasa.gov /?meteor_streams   (158 words)

  
 The American Meteor Society
Welcome to the home of the American Meteor Society, Ltd., a non-profit scientific organization established to inform, encourage, and support the research activities of both amateur and professional astronomers who are interested in the fascinating field of Meteor Astronomy.
Beyond their love of the night sky and meteor science, these diverse individuals have one thing in common: they are all affiliates of the American Meteor Society, Ltd.
We are an organization of amateur and professional meteor scientists and observers founded in 1911, with a common goal of studying meteors: - bright fireballs, the annual meteor showers, and the random sporadic meteors that appear every night.
www.amsmeteors.org   (609 words)

  
 Astronomy - Meteors and meteor showers - Francis Reddy
These are sporadic meteors, their source bodies — meteoroids — are part of the dusty background of the inner solar system.
Meteors become visible at altitudes between 50 and 75 miles (80 and 120 kilometers), with faster particles typically shining at greater heights.
The meteors are among the fastest (42 miles [67 km] per second) and are faint on average, but the brighter ones have a yellowish color; about 30 percent leave trains.
www.astronomy.com /asy/default.aspx?c=ss&id=77   (2249 words)

  
 Meteor   (Site not responding. Last check: )
A meteor refers to the light phenomena observed when a meteoroid enters the Earth's (or another body's) atmosphere, commonly called a shooting star.
A very bright meteor, brighter than the apparent magnitude of Venus, may be referred to as a fireball or bolide.
It uses material from the Wiktionary page "Meteor".
www.serebella.com /encyclopedia/article-Meteor.html   (151 words)

  
 Russia and Earth Observation Systems
Originally launched by the Vostok booster into nominal orbits of 850 km by 900 km at an inclination of 81.3 degrees, during 1982-1984 the Meteor 2 satellites were transferred to the Tsyklon-3 booster and a new orbital regime of 940 km by 960 km with an inclination of 82.5 degrees.
The Meteor 3 program began with the launch of Meteor 3-1 in 1985 after the prototype spacecraft (Kosmos 1612) was lost due to a launch vehicle failure the previous year.
Working with Meteor 3-5 during 1993 were Meteors 3-3 and 3-4, but both had come to the end of their useful lives as the year came to a close.
www.fas.org /spp/guide/russia/earth/meteor.htm   (1602 words)

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