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i attended the taebo and roadrun today and one amazing moment was happened. i nver expected it but i see them.whew!
it was early dawn today when i see 5 falling stars when i happened to look up..and oh i was so happy to see it again ang giving up some blow minding memories i had back years.
just remember those times when all i’ve done is to stare at the sky at night to see the stars above and sometimes i do happened to eyecatched a falling star. the memories of being with the sky makes me smille much…although im not good at naming them…i do see some constellations forming up there…i do see them and makes me go to sleep afterwards. maybe starwatching makes my day good afterall, thus i find haven seing them.
i do remember too that i have a dream on fa lling star directly falls on me when i was in college…although that falling star make me shiver a bit because in my dream i was already dead but well im still here enjoying the life God has given me. i do knew it was my guiding star who goes inside me and guides me and now im here on where i am..thanks for this stars who were my guides.
wishing upon the falling stars have great things done on me. i have many wish that came true and im thankful for giving it to me my falling stars.hahaha.although those stars fall but still they keep on eye on me.thanks a lot for doing it to me…i felt i was so blessed with this…
A meteoroid is a large sand to boulder-sized particle of debris in the Solar system. The visible path of a meteoroid that enters the Earth’s (or another body’s) atmosphere is a meteor, commonly called a shooting star or falling star. Many meteors are part of a meteor shower.
The root word meteor comes from the Greek meteōros, meaning high in the air.
A meteoroid is a small sand to boulder-sized particle of debris in the Solar system. Larger than that, the object is an asteroid; smaller than that, it is interplanetary dust. The current official definition of a meteoroid from the International Astronomical Union is “A solid object moving in interplanetary space, of a size considerably smaller than an asteroid and considerably larger than an atom or molecule.” The Royal Astronomical Society has proposed a new definition where a meteroid is between 100 µm and 10 m across.
A meteor is the visible event that occurs when a meteoroid or asteroid enters the earth’s atmosphere and becomes brightly visible. For bodies with a size scale larger than the atmospheric mean free path (10 cm to several meters) the visibility is due to the heat produced by the ram pressure (not friction, as is commonly assumed) of atmospheric entry. Since the majority of meteors are from small sand-grain size meteoroid bodies, most visible signatures are caused by electron relaxation following the individual collisions between vaporized meteor atoms and atmospheric constituents. The meteor’s just what we see.
A fireball is a very bright meteor. The International Astronomical Union defines a fireball as “a meteor brighter than any of the planets” (magnitude -4 or greater). The International Meteor Organization (an amateur organization that studies meteors) has a more rigid definition. It defines a fireball as a meteor that would have a magnitude of -3 or brighter if seen at zenith. This definition corrects for the greater distance between an observer and a meteor near the horizon. For example, a meteor of magnitude -1 at 5 degrees above the horizon would be classified as a fireball because if the observer had been directly below the meteor it would have appeared as magnitude -6.
The word bolide comes from the Greek βολις, (bolis) which can mean a missile or to flash. The IAU has no official definition of bolide and generally considers the term synonymous with fireball. The term is more-often used among geologists than astronomers where it means a very large meterorite. For example, the USGS uses the term to mean a generic large crater forming projectile “to imply that we do not know the precise nature of the impacting body . . . whether it is a rocky or metallic asteroid, or an icy comet, for example”. Astronomers tend to use the term to mean an exceptionally bright fireball, particularly one that explodes (sometimes called a detonating fireball).
A meteorite is a meteoroid or asteroid that survives its entry into the atmosphere and strikes the ground. A meteorite striking the Earth or other object may produce an impact crater. Geologists use the term bolide to mean a very large meteorite (see above).
In the 20th century, two people were reportedly struck by meteorites. Both survived with minor injuries. In the 1990s an empty car was struck and heavily damaged by a meteorite. The car sold as a collector’s item for several tens of thousands of dollars. In all there are some dozen cases of meteorite falls documented to have hit people, property, or animals.
Molten terrestrial material “splashed” from a crater can cool and solidify into an object known as a tektite. These are often mistaken for meteorites.
Most meteoroids are destroyed when they enter the atmosphere. The left-over debris is called meteoric dust or just meteor dust. Meteor dust particles can persist in the atmosphere for up to several months. These particles might affect climate, both by scattering electromagnetic radiation and by catalyzing chemical reactions in the upper atmosphere.
Many meteoroids are formed by impacts between asteroids though many are also left in trails behind comets that form meteor showers and many members of those trails are eventually scattered into other orbits forming random meteors too. Other sources of meteors are known to have come from impacts on the Moon, or Mars as some meteorites from them have been identified.
Even very small meteoroids can damage spacecraft. The Hubble Space Telescope for example, has about 100 tiny craters and chipped areas.
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