What are the 3 types of meteoroids?
550861
iron-nickel - from cores of asteroids \nsilicate rock - from surfaces of asteroids \ncarbon - with complex organic molecules like amino acids
365022
Comets are made of ice ,dust &gases
1138155
Soon! From June 10-21, we should see the June Lyrids meteor shower in the northern hempisphere\n\nhttp://comets.amsmeteors.org/meteors/showers/june_lyrids.html\n\nA site with great info on comets and meteor showers is http://comets.amsmeteors.org/index.html (BTW, you should see the Shoemaker 1 comet tonight)\n\nAlso, for stars in general, I highly reccommend \nhttp://skyandtelescope.com/observing/\n\nIt has a really great interactive map function... also, they offer a customised star chart, v cool!\nhttp://skyandtelescope.com/observing/skychart/article_1220_1.asp\n\nHope that helps!
586740
There are three basic types of rocks: igneous, sedimentary, and metamorphic.\n\nIgneous rocks are formed from molten magma or lava. Igneous rocks vary greatly in grain structure and size, depending upon how quickly the magma or lava cooled. An example of an igneous rock is obsidian.\n\nSedimentary rocks are formed when layers of sediment are compacted by pressure. They are often composed of fragments of materials derived from other rocks and minerals, especially quartz.\n\nMetamorphic rocks occur when igneous, sedimentary, or previously-formed metamorphic rocks are submitted to extreme heat or pressure beneath the earth's surface, changing their structure and appearance. They often exhibit "foliation" or color banding when mineral crystals are elongated due to pressure. An example of a metamorphic rock is slate.
184235
The term meteor comes from the Greek meteoron, meaning phenomenon in the sky. It is used to describe the streak of light produced as matter in the solar system falls into Earth's atmosphere creating temporary incandescence resulting from atmospheric friction. This typically occurs at heights of 80 to 110 kilometers (50 to 68 miles) above Earth's surface. The term is also used loosely with the word meteroid referring to the particle itself without relation to the phenomena it produces when entering the Earth's atmosphere. A meteoroid is matter revolving around the sun or any object in interplanetary space that is too small to be called an asteroid or a comet. Even smaller particles are called micrometeoroids or cosmic dust grains, which includes any interstellar material that should happen to enter our solar system. A meteorite is a meteoroid that reaches the surface of the Earth without being completely vaporized.
75245
rock\npunk rock\nalternative rock
1085134
See if any of the pictures on this link look like what you saw:\nhttp://images.search.yahoo.com/search/images?p=meteors&ei=UTF-8&fr=ytff1-&x=wrt
718750
A meteorite is an extraterrestrial body that survives its impact with the Earth's surface without being destroyed. While in space it is called a meteoroid. When it enters the atmosphere, air resistance causes the body to heat up and emit light, thus forming a fireball, also known as a meteor or shooting star.
27334
A meteor that has entered the earth’s atmosphere and is burning up
908394
a shooting star is an informal name given to a meteor\n\na meteorite is the term given when a meteor survives vaporization and reaches the Earth's surface\n\nmeteorites are composed of peridotite and an iron nickel metal\n\nmeteors are smaller asteroids
358080
There was an Oroinoid (I think) meteor shower a week ago.  I don't know if it is anual, if it is it seems that this was supposed to be an especially good show.\n\nThere are two other easily seen meteor showers that are annual (so they lie in the Earth's orbital path).  I believe Perseids are in August and Leonoids are in November.\n\n\nI found a table in my astronomy book\nHere I'll list the annual shower and when it reaches it's maximum (so you can see it in the few days before and after but this is when you should see the most activity).\n\n\nQuadrantids      Jan 3-4\nLyrids           Apr 22\n*nu* Aquarids    May 5\nPerseids         Aug 12\n*kappa* Cygnids  Aug 20\nOrionids         Oct 21\nTaurids          Nov 1\nLeonids          Nov 17\nGeminids         Dec 13-14\nUrsids           Dec 22
1162500
To answer some of your question......\nThe average velocity of meteoroids entering our atmosphere is 10-70 km/second. The smaller ones that survive the trip to the Earth's surface are quickly slowed by atmospheric friction to speeds of a few hundred kilometers per hour, and so hit the Earth with no more speed than if they had been dropped from a tall building. For meteorites larger than a few hundred tons (which fortunately are quite rare), atmospheric friction has little effect on the velocity and they hit the Earth with the enormous speeds characteristic of their entry into our atmosphere. Thus, for example, it is estimated that the meteorite that produced the Barringer Crater(http://csep10.phys.utk.edu/astr161/lect/meteors/meteor.jpg) was still travelling at 11 km/second when it struck what is now the Arizona desert 49,000 years ago. Such objects do enormous damage, because the kinetic energy carried by the meteorite is the product of the mass and the square of the velocity. A meteorite that large hitting the ocean would create a Tsunami. Whether it would cause as much damage as the one in Indonesia/india/africa, would depend on how close to land the meteorite struck. Change in our ecosystem would not be that great. On the other hand if we were to be struck by an asteroid as in the case of the K-T Extinction, there would be a dramatic effect on the ecosystem. ( just a quick note on asteroids,comets and meteors: Asteroids and comets are both classified as near-Earth objects. Asteroids are made of rock or metal and are thought to have been created in the warmer inner solar system. Comets are composed of ice, rock, and organic (carbon-based) compounds, and are believed to have formed in the cold outer solar sytem. Scientists believe both are "...ancient remnants of the earliest years of the formation of our solar system more than four billion years ago." When asteroids collide, meteroids, smaller rocky bodies, often result. Meteroids are also formed when a comet passes near the sun, and the heat releases dust particles from the comet's icy tail. When a meteroid or asteroid enters the Earth's atmosphere, it ignites, creating a visible streak of light called a meteor. If the object doesn't vaporize completely and crashes into the Earth, it's called a meteorite. \nFinaly, a meteorite, because of its size, would not cause dramatic changes to our eco-system, however, large one can would be able to produce a tsunami.....\n\nChris
46950
There are many, many types of weather instruments. A complete list would be very extensive, but here are a few instruments to investigate:\n\nAnemoscope, anemometer, hygrometer, barometer,rain gauge, thermometer, sling psychometer, radiosonde, rocketsonde, theodolite, weather satellites, doppler radar, various lightning instruments like time of arrival and magnetic direction sensors, lightning imaging sensor (space-based), electric field mills, Gerdien conductivity probes, pyranometer (actinometer), evaporimeter (atmometer), and so on.
241463
Tetrahedron\nCube (hexahedron)\nOctahedron \nDodecahedron \nIcosahedron \n(I think...)
237294
Meteoroids actually come from outer space. not from planets because they would disappear if they keep breaking off. Not from stars because they are thousand of light years away from our solar system. They come from massive asteroids. As they come from some were, they get hot and starts to crack and then breaks off, becoming an meteoroids.
85518
Several:\n\nVenus. \nJupiter.\nSaturn\nNeptune.\nUranus.\n\n\nAnd some moons have clouds:\n\nJupiter's Galilean moons Io, Europa, Ganymede and Callisto have dust clouds from micrometeorites. \n\nSaturn's moon titan has methane clouds apparently.
861953
I would try checking the meteorobs mailing list. And perhaps posting about your sighting to the list.\n\nhttp://tech.groups.yahoo.com/group/meteorobs/\n\nThere's also a fireball log here:\n\nhttp://www.amsmeteors.org/fireball/fireball_log2006.html\n\nUpdate: Turns out you weren't alone. There's a bunch of sightings posted in the fireball log I posted above as well as an update that was posted to spaceweather.com\n\n"On Nov. 28th, in a split-second of total coincidence, a meteoroid the same size as the Lunar Leonid plunged to Earth over the Marshall Space Flight Center in Huntsville, AL. What happened? Nothing. It disintegrated harmlessly in the atmosphere. A local security camera captured this movie of the beautiful fireball."\n\nAnd here's the movie they are referring to:\n\nhttp://science.nasa.gov/spaceweather/swpod2006/03dec06/huntsville.asf