What are comets made of?
365022
Comets are made of ice ,dust &gases
159793
The answer is either “Yes” followed by “but”, or “No” followed by “however”.\n\nThe biggest problem is that meteorites aren’t all one thing. Many are objects from the asteroid belt. However many are comets or fragments of cometss. Some are fragments smashed off other planets like the famous Martian meteorite that was found 15 years back and supposed to contain signs of life. Some are probably fragments of the Earth itself torn lose when the moon formed.\n\nIf we limit ourselves to just meteorites form the Asteroid belt that have swung out of orbit and found us, well the asteroid belt itself is believed to be the result of a planet that was torn apart many billions of years ago. So to answer your question, no, the Earth isn’t formed from the same thing as meteorites. Meteorites are formed from the destruction of another planet entirely. \n\nHowever it is the same thing in the sense it is all solid planetary material. Asteroids aren’t primarily of frozen water and gas like comets are.\n\nIt really does depend entirely on what you mean by ‘thing’. Ultimately everything in the universe is made from the same thing. It depends on how far back you want to go.\n\n______________________________\nTheca said “they think earth is meteorites stuck together\n>>>> after the big boom, so basically yes\n\n\nThey don’t think that. ‘ They’ think Earth is the result of dust and gas condensed out of the cloud left by a supernova. The planet that the asteroids broke off from formed out of the same material, but neither were formed from ‘meteorites’ stuck together.
33018
Plastic is a polymer, meaning it is a chain of small similar units all connected in a single molecule.  Usually it is made by taking a solution that consists of the building block units (called monomers) and including whatever chemicals will make the monomers bonds together.  The mixture is put into a mold and heated, and the resultant polymer has huge, inter-tangled chain molecules that become rigid and hard.  The mold is removed, and voila.
858037
carbon. because it can bond with more elements than any other, including itself.\n\nhence life is made out of it.\n\nit is extremely hard (diamond) and can be extremely soft (graphite). \n\nit doesnt have a melting point.
947106
WASHINGTON -- While astronomers predict only a minimal blast of dust debris from comet Tempel-Tuttle for the Leonid meteor shower this week, some spacecraft controllers are on standby alert.\n\nFor the past two years, measures have been taken to protect Earth-circling satellites from the Leonids. High-velocity particles can wreak havoc with spacecraft, damaging solar panels, as well as delicate sensors. \n\nHits of speeding comet debris can also spark electrical effects in a satellite, possibly causing control thrusters to accidentally fire.\n\n[uplink]\n\nThe potential severity of the Leonid shower in 1998 and 1999 spurred a number of precautionary action items for satellite ground controllers. \n\nSelected satellites and components were powered down. "A team" personnel took over consoles during the showers. And a number of spacecraft solar panels were adjusted to minimize exposure to incoming storm debris
359180
Chondrites and achondrites is one answer.  Chondrites are the more common form.  But another answer would be "stony" and "iron", of which the stony form is more common.  But of course you can have stony-iron meteorites too...
44003
amino acids, but the whole experiment was biased. why? they assumed that the first chemicals in the "primordial pool" were methane, ammonia, hydrogen and water. there is debate on this now because NASA has determined that the earth's "primordial soup" was not made of that. Water, oxygen and nitrogen seem to be more along the lines of reality. besides, linking amino acids together to form proteins is remarkably easy. if you are smart. by chance it "is about the same as the probability that a tornado sweeping through a junk yard could assemble a 747 from the contents therein" as Fredrick Hoyle has said (smart beyond belief, but weird)
1072965
Asteroides \n\nAny of numerous small celestial bodies that revolve around the sun, with orbits lying chiefly between Mars and Jupiter and characteristic diameters between a few and several hundred kilometers. Also called minor planet, planetoid.\n\nA small, mostly rocky body orbiting the Sun. Asteroids range in size from 1000 kilometers in diameter to tiny objects you could hold in your hand. Most asteroids orbit the Sun between Mars and Jupiter, and are the source of most meteorites. \n\nAn asteroid is a small, solid object in our Solar System, orbiting the Sun. An asteroid is an example of a minor planet (or planetoid). These minor planets are much smaller than the small planets such as Mercury or Mars. It is believed that most asteroids are remnants of the protoplanetary disc. The incorporation of these remnants into the planets during the formation of the Solar System was prevented by large gravitational perturbations induced by Jupiter. Some asteroids have moons. The vast majority of the asteroids are within the main asteroid belt, with elliptical orbits between those of Mars and Jupiter.\n\nMeteorites\n\nA stony or metallic mass of matter that has fallen to the earth's surface from outer space.\n\nthat survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites.\n\nObjects from outside the Earth that enter the Earth's field of gravitation and fall to the Earth's surface. Meteors, on the other hand, are objects from space that burn up in the Earth's atmosphere. \n\n\nMeteorites are bodies that are left over from the time when the planets formed, and therefore give us clues about the formation of the solar system.\n\nA metallic or stony (silicate) body that has fallen on Earth (or other planetary body) from outer space. Most meteorites come from asteroids, but a small number come from the Moon or Mars (see SNC meteorites). Meteorite types include: iron, stony iron, chondrite, carbonaceous chondrite, and achondrite. [See "Meteors, Meteorites, and Impacts" from The Nine Planets website.] Meteorites smaller than 1 mm are called "micrometeorites." \n\nA mass of metal or stone remaining from a piece of matter that has fallen upon the earth from the solar system.
937492
The speed of a comet can be found by observing its motion relative to background stars. First you'd need to know the comet's distance when you begin measurements. Also, the longer you observe it and gather data on its movement the more accurate will be the velocity solution.
420776
a comet is a ball of rock and ice that orbits the sun on a large elliptical orbit.  THey usually are not in the normal orbital plane of the planets so we only see them once in a while. So if the planets go around and around like on a plate, comets go on an angle like a plate on a 75 degree angle.  And instead of the sun being close to the center of the plate, with comets, the sun is much closer to the edge of the plate.\n\nSome planets take far longer than 76 years to orbit (pluto, neptune, etc...) so their orbits are even larger.  But they are more regular, comet's orbits are more stretched out so they get closer to the sun.
1063458
Shoemaker 1, tonight!\n\nVery comprehensive calender of comets below:\n\nhttp://www.aerith.net/comet/future-n.html\n\nBut for a simple answer, look at this website, it seems that today (7th June) we will see  the brilliantly named 102P/Shoemaker 1, which you can read about at the second of the two below links, and the third link is wikipedia's little info page on it (the important info is in the table at the right-hand side of the page)\n\nhttp://cometography.com/current_comets.html\nhttp://cometography.com/pcomets/102P.html\n\nSo get that telescope out! :-) Hope that helps
519613
If you mean completely made of diamond (tetrahedral carbon), then no.  There may be some sections of rocky moons where impacts from smaller object have created diamonds through heat and pressure but probably never enough to convert an entire moon to diamond or diamondoid material.\n\nHowever, a number of years ago there was an article published in Science (I think) that discussed what happens to carbon that is disassociated in Jupiter's atmosphere.  The author suggested that this carbon would fall to a point within the planet where the temperature and pressure would be sufficient to form a diamondoid layer or regions.\n\nI want to say the author is Frank Drake but it's been a number of years since I've seen the article.
499596
A comet is like a dirty snowball, full of rocks and chunks of gravel. As it swings around the Sun on its long elliptical orbit, the comet begins to heat up and vaporize. At the same time, the solar wind is streaming out at the comet. It can't hold back the main mass of the comet because it has so much momentum. The particles vaporized off the comet may become electrically charged and begin to repel one another. So the 'halo' of particles will spread out and trail behind.\n\nSometimes a comet will break up entirely if the ice all vaporizes, and then there is nothing left but the rocks and gravel. The meteor showers we have every year...? The Perseids and Leonids and others? They are what is left of big old comets that used to come by every so often. When they hit our atmosphere, they burn up and we see flashed of light.\n\nThey have spread out over a much larger area than they used to cover, because of the ice vaporizing and the vapor expanding. But it is still a good thing that they didn't hit us while they were all in one piece. We couldn't do anything to stop it.\n\nIn the old days, people used to pray, "From the Norsemen (the terrorists of their day) and the comet, Dear Lord, deliver us!" They prayed better than they knew. Maybe we should start praying like that again.
681471
yes comets have orbits
37735
Stars are like our Sun. Not comets at all. Comets are dirty, big snowballs that have no light at all. The twinkling comes from heat radiating from earth which makes the light spectrum shift in different colours. Symbols that represent something doesn't often look like the original. Take the symbol for a heart for example. But it's easy! :) Try to draw a immensly huge boiling, burning piece of gas that throws tons of particles out from it in lightning speed and see if anyone understands what you drew. Now try to make it into a character that you can type on a keyboard :)
480373
stars, planets, comets, meteors
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Dark Comets by Shapen