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Do all comets have a Tail?
Tempel 1 looks so dry,and with all those sandy craters begs the question
"does it have a tail?" Some comets tails are millions of miles long,and that could tell us something about its composition. Tempel 1 when hit by that 600lb projectile caused a man made crater and the explosion blaster fine dust 100 of miles into space(mostly fine dust.) Tempel 1 seen close up has proven it is not a dirty snow ball. I think when more and more comets are probed we will have to change are way of describing them. Comets 3.8 billion years ago were very wet. Now they are very dry. The Sun has destroyed water molecules. into their two atoms. Its the dense atmosphere of the Earth that has saved water from breaking apart. Bert |
#2
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Do all comets have a Tail?
"G=EMC^2 Glazier" wrote in message...
... Tempel 1 looks so dry,and with all those sandy craters begs the question "does it have a tail?" Some comets tails are millions of miles long,and that could tell us something about its composition. Tempel 1 when hit by that 600lb projectile caused a man made crater and the explosion blaster fine dust 100 of miles into space(mostly fine dust.) Tempel 1 seen close up has proven it is not a dirty snow ball. I think when more and more comets are probed we will have to change are way of describing them. Comets 3.8 billion years ago were very wet. Now they are very dry. The Sun has destroyed water molecules. into their two atoms. Its the dense atmosphere of the Earth that has saved water from breaking apart. Bert Pretty much yup, Bert. And some tails get even longer. Longest on record, i think, was the tail of comet Hyakutake. Ulysses, the joint ESA/NASA spacecraft, was on a mission to map the Sun's poles when it chanced upon Hyakutake's tail back in 2000. The nucleus was more than 325 million miles back toward the Sun from Ulysses! Some scientists think that comet tails stretch all the way out to the edge of the heliosphere, about 100AU from the Sun! happy days and... starry starry nights! -- I'm a fool upon a hill, See my planet spinning still? Sun goes down and stars arise, Warm and pleasing to mine eyes. See my little telescope? People say I'm such a dope; I don't mind because I nurse Secrets of the Universe! http://www.geocities.com/odetobobbie...yric/lfool.htm Indelibly yours, Paine http://www.savethechildren.org/ http://www.painellsworth.net |
#3
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Do all comets have a Tail?
On Oct 3, 5:20 am, (G=EMC^2 Glazier) wrote:
Tempel 1 looks so dry,and with all those sandy craters begs the question "does it have a tail?" Some comets tails are millions of miles long,and that could tell us something about its composition. Tempel 1 when hit by that 600lb projectile caused a man made crater and the explosion blaster fine dust 100 of miles into space(mostly fine dust.) Tempel 1 seen close up has proven it is not a dirty snow ball. I think when more and more comets are probed we will have to change are way of describing them. Comets 3.8 billion years ago were very wet. Now they are very dry. The Sun has destroyed water molecules. into their two atoms. Its the dense atmosphere of the Earth that has saved water from breaking apart. Bert Tempel One was analyzed to be composed of about 50% ice crystals. But it also had other stuff in it like carbonates that they usually find in seashells. This surprised scientists. Not dry, Bert. In fact, with that seashell material, you might think it was blasted off a water world, perhaps when the collision happened that formed its moon! Double-A |
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Do all comets have a Tail?
"Double-A" wrote in message
ups.com... On Oct 3, 5:20 am, (G=EMC^2 Glazier) wrote: Tempel 1 looks so dry,and with all those sandy craters begs the question "does it have a tail?" Some comets tails are millions of miles long,and that could tell us something about its composition. Tempel 1 when hit by that 600lb projectile caused a man made crater and the explosion blaster fine dust 100 of miles into space(mostly fine dust.) Tempel 1 seen close up has proven it is not a dirty snow ball. I think when more and more comets are probed we will have to change are way of describing them. Comets 3.8 billion years ago were very wet. Now they are very dry. The Sun has destroyed water molecules. into their two atoms. Its the dense atmosphere of the Earth that has saved water from breaking apart. Bert Tempel One was analyzed to be composed of about 50% ice crystals. But it also had other stuff in it like carbonates that they usually find in seashells. This surprised scientists. Not dry, Bert. In fact, with that seashell material, you might think it was blasted off a water world, perhaps when the collision happened that formed its moon! Double-A Now see, this is another problem that i have with the present moon-creation theory that a Mars-sized rock collided with Earth to form the Earth/Selene binary planet system... A rock that size would have to have been a protoplanet forming in a stable orbit around the Sun. If it were as large as Mars, then it would have taken a good deal of time in a stable orbit to get that size. Then that rock was somehow knocked out of stable orbit to a new orbit on an eventual collision path with Earth. The chances against this have to be staggering. Comets, on the other hand, are known to lose mass on each pass toward the Sun and back out again. Back several billion years ago, some of them may have been quite a bit larger than any we've seen or heard about in this age. And unlike a protoplanet that must somehow be knocked out of a stable solar orbit, a comet is already on a path that might get in the way of a planet. Could it have been a large comet rather than a Mars-sized rock that collided with Earth to form our mysterious sister planet, Selene? happy days and... starry starry nights! -- Tender is my love for thee Oh star so close at hand, Warming those so dear to me As we play on the sand... It's so easy to believe In all this beachin' fun, That some day you and we will be-- Altogether one. http://sec.noaa.gov/primer/primer.html As it "sinks" into the sea, You can almost hear the sssssss... http://tinyurl.com/2tjr2b Indelibly yours, Paine http://www.savethechildren.org/ http://www.painellsworth.net |
#5
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Do all comets have a Tail?
In article ,
"Painius" wrote: snip Now see, this is another problem that i have with the present moon-creation theory that a Mars-sized rock collided with Earth to form the Earth/Selene binary planet system... A rock that size would have to have been a protoplanet forming in a stable orbit around the Sun. If it were as large as Mars, then it would have taken a good deal of time in a stable orbit to get that size. Then that rock was somehow knocked out of stable orbit to a new orbit on an eventual collision path with Earth. The chances against this have to be staggering. On the contrary, that the object collided with Earth implies that it was *not* in a stable orbit; it may have been 'dumped' into the inner solar system by interaction with a gas giant. Early in the solar system's history the orbits of even the largest planets were undergoing very significant secular changes, and in the process of clearing their paths Jupiter and Saturn flung a great number of smaller worlds about. This continued for quite some time after the formation of the Moon, as evidenced by the many ancient scars on its surface. It's true that the densest bodies must have formed in the inner parts of the solar system, but why assume the hypothetical impactor was one such? The greater the relative velocities involved in a collision, the more destructive it is (in proportion to v^2); a planet formed in a similar orbit to Earth's would be unlikely to close very fast. OTOH an icy, comet- or KBO-like 'rock' coming from the outer regions on an eccentric trajectory would impart much more energy in proportion to its mass -- and if composed of light, volatile materials, could have boiled away in the collision and over the following billion years or so. -- Odysseus |
#6
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Do all comets have a Tail?
Painius Right you are. Collision(explosion) theory creates more
questions . Once a theory needs lots of explaining(lots of words) Bohr,and Einstein will tell you its a bad theory. Capture theory is simple,and even a bar maid can understand it(Bohr) Bert |
#7
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Do all comets have a Tail?
Not having a tail begs the question. Are they out there but unseen? If
Pluto had a elongated orbit that got it as close to the Sun as Mercury would it have a tail,and would we call it a comet? Would it be to big to call it a comet? Its two small to be called a planet. When comets came into the solar system could some of them been as large as Pluto,and melted away? Bert |
#8
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Do all comets have a Tail?
On Oct 5, 7:04 am, (G=EMC^2 Glazier) wrote:
Not having a tail begs the question. Are they out there but unseen? If Pluto had a elongated orbit that got it as close to the Sun as Mercury would it have a tail,and would we call it a comet? Would it be to big to call it a comet? Its two small to be called a planet. When comets came into the solar system could some of them been as large as Pluto,and melted away? Seems like having a tail is what defines a comet AS a comet. Would a *tailless* object of the same mass and on the same trajectory as it rounds the sun still be defined as a comet? And would a 'real' comet, when it's out furthest from the sun and sporting no tail, still be technically a comet? Deep questions for inquiring minds. :-) oc |
#9
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Do all comets have a Tail?
On Oct 5, 7:51 am, oldcoot wrote:
On Oct 5, 7:04 am, (G=EMC^2 Glazier) wrote: Not having a tail begs the question. Are they out there but unseen? If Pluto had a elongated orbit that got it as close to the Sun as Mercury would it have a tail,and would we call it a comet? Would it be to big to call it a comet? Its two small to be called a planet. When comets came into the solar system could some of them been as large as Pluto,and melted away? Seems like having a tail is what defines a comet AS a comet. Would a *tailless* object of the same mass and on the same trajectory as it rounds the sun still be defined as a comet? And would a 'real' comet, when it's out furthest from the sun and sporting no tail, still be technically a comet? Deep questions for inquiring minds. :-) oc Venus has a tail: "Venus has an ion-packed tail 45 million km/28 million mi in length that stretches away from the Sun and is caused by the bombardment of the ions in Venus's upper atmosphere by the solar wind. It was first discovered in the late 1970s but it was not until 1997 that the Solar Heliospheric Observatory revealed its immense length." http://www.tiscali.co.uk/reference/e.../m0010425.html Double-A |
#10
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Do all comets have a Tail?
Comets lose their tails and become asteroids, BEERTbrain. Wow, you
sure are behind in astronomical knowledge! Saul Levy On Wed, 3 Oct 2007 08:20:15 -0400, (G=EMC^2 Glazier) wrote: Tempel 1 looks so dry,and with all those sandy craters begs the question "does it have a tail?" Some comets tails are millions of miles long,and that could tell us something about its composition. Tempel 1 when hit by that 600lb projectile caused a man made crater and the explosion blaster fine dust 100 of miles into space(mostly fine dust.) Tempel 1 seen close up has proven it is not a dirty snow ball. I think when more and more comets are probed we will have to change are way of describing them. Comets 3.8 billion years ago were very wet. Now they are very dry. The Sun has destroyed water molecules. into their two atoms. Its the dense atmosphere of the Earth that has saved water from breaking apart. Bert |
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