One of the surprising things observed in the passage of the Epoxy / Deep Impact spacecraft near the comet is that large amounts of water blown from the comet are also accompanied by large amounts of gas
From the moment the Deep Impact spacecraft finished its encounter with comet Temple on July 1, 2005, there was an intention to use it again to study other comets. The target was the comet Boettin, but it disintegrated. Therefore it was decided to change its designation and the chosen comet was Hartley. In order to reach it, the spacecraft performed a transit flight near the Earth to change its flight path and accelerate its speed and reach it on November 4.11.2010, 700. It was decided that the spacecraft would pass at a distance of XNUMX km from it. A closer approach could have endangered the spaceship. The fear was that ice particles emitted from the comet would hit her and cause her damage. It was therefore necessary to make the transition at an optimal distance that would allow the spacecraft to perform its measurements without causing damage to it. When the spacecraft was close to the comet, the research instruments of the Odin research satellite, which was originally intended for astronomical and atmospheric observations, were directed towards it. This is a satellite built by Sweden jointly with Canada and Finland.
The spacecraft began observing the comet on September 5.9. And every day she broadcasts 2000 photographs. At the minimum crossing distance, the resolution was 7.6 meters per pixel. The transit time was planned so that the spacecraft would be between the comet and the sun from the south of the comet's nucleus, a point where the comet is optimally located in terms of sunlight falling on it. The transit itself lasted 3 hours and the observation continued for about 118,00 weeks afterwards. A total of XNUMX photographs from the comet were broadcast to Israel.
According to estimates made before the encounter, the length of the comet is 1.2 km and from a distance it looks like a machine for producing dust. It orbits the sun once every 6.5 years and that it revolves around itself once every 17 hours. Shortly before the encounter between the spacecraft and the comet on October 28.10.2010, 1.059, it was 2 astronomical units away from the sun. Close measurements showed that the length of the comet is 0.4 km and its minimum width is 18 km. It turned out that its axial speed is lower and that it rotates around itself once every XNUMX hours. It also rotates around its longitudinal axis.
Its surface is covered with a layer of material several meters thick. It is possible to distinguish 3 regions in the comet. One part is wide, the middle part is narrow and the third part is also wide, which is wider than the width of the first part. On both of its wide sides it is covered with small craters. The middle part is completely smooth and in the wider part you can see a depression tens of meters long connecting two craters. On the surface at the edges of the comet are blocks of rocks that are up to 70 meters high.
The nucleus is not uniform and there are probably 2-3 types of ice in it. Although the overall chemical composition is uniform, it seems that what is elusive and unclear is happening inside the comet.
The gas emissions are from different places on its surface. On 2.10 and 26.10 they noticed two eruptions of materials from it. They noticed the emission of cyanide, the emission of water at a rate of 180-300 kg/second, the emission of CO2, ice and organic substances. There was indeed advance knowledge that CO2 was emitted from it, but not in the quantities observed. The ice crystals that fell from it are very large, among them the size of basketballs, which in retrospect justified the decision made not to bring the spacecraft too close to the comet. The ice cloud emitted from it is dozens of kilometers wide or more. The ice blocks look crisp and remind of the ice found in high mountains. The ejection speed of the ice blocks is 8-16 km/h.
One of the surprising things observed is that large amounts of water blown from the comet are also accompanied by large amounts of gas. When the amounts of water emitted are small, the other amounts of gas emitted are also reduced. What is seen in one observation can change in another observation. According to the researchers' assessment, the water blocks in the core are bound together with the evaporating CO2 before the water evaporates.
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And this message also sounds wonderful from WordPress translators.
Regardless of more than 2 links, the system requires approval - to prevent spam
This time it worked... happens sometimes.
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The asteroid MD 2011 - passes very close to KDA:
http://www.space.com/12067-asteroid-2011-md-close-earth-flyby-june-27.html
Comet Elneo which is supposed to come to a very close encounter with the Earth:
http://www.space.com/11617-comet-elenin-wimpy-solar-system.html
And despite what was said in the article linked above, a message from NASA to all their employees and their families to prepare for an emergency:
http://www.nasa.gov/centers/hq/emergency/personalPreparedness/index.html
According to my understanding, there are other celestial bodies that are supposed to come very close to us.
Don't you think it's worth covering? I think there is much more interest here than in Hartley.
And to the point of your words. Every day there are dozens of scientific news worthy of reference. Our workforce is limited and based on volunteers. If you want to volunteer, you are welcome.
the other me
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The word in Greek should be "missed" above of course.
What about writing about the asteroid MD2011 that "SSP" flew by a few days ago and was not reported on until after it passed us? He passed much closer than Hartley.
How about writing something about Ele-nin the comet that should arrive here in the fall? Also much closer than Hartley… Here is a message from NASA to their emergency planning staff: http://www.nasa.gov/centers/hq/emergency/personalPreparedness/index.html
Don't you think this is news??
I added three links in the response to substantiate what I wrote and I received a strange response: "You wrote too much in one response, slow down" - is this a joke?
Or is it enough to write the name El-e-nin and the site filters??
Raz:
Your question is not defined correctly.
If the laws of physics known to us today are correct, then the law of conservation of mass and energy holds true in the universe.
This means that new particles of matter can be created in it, but not just like that - out of thin air - but at the expense of the energy present in it.
This happens frequently in particle accelerators built by man. There - the collision energy of the particles is often converted into new material particles - but this always happens at the expense of the kinetic energy that is lost.
What is preserved is the total sum of the mass and energy (which are brought to a common denominator using Einstein's well-known formula - E=Mc^2).
The truth is that there are exceptions to this, but they are negligible.
Because of the uncertainty principle, the vacuum also swarms with particles that are constantly being created and ionized in violation of the law of conservation of mass and energy for fractions of a second.
All this, as mentioned, according to the physical theories accepted today and means - if we take your words naively and intuitively - that the simplistic answer to your question is "no".
It should also be remembered that the known laws of nature also take into account the possibility of the formation of matter and energy in considerable amounts out of nowhere during an event such as the Big Bang itself, but this is a special situation that is not the situation in which the universe is today.
Peace,
Can anyone direct me? I'm looking for information/an answer to a question and I can't really find a clear answer.
The question is this: Is new matter/new particles created in the universe? Or was all the matter/particles created in a finite amount at the time of the big bang?
(When I speak of the "matter in the universe" I mean of course all those particles that are identified in the universe from an electron through an anti-electron including the "dark matter", quarks and other known and unknown particles that may exist).
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I missed characters again, apparently the keyboard needs care 🙂
The correct distance is 21 or 22 million million miles - still very close. That's 0.24 astronomical units - which means that this comet will pass between the Earth and the Sun.
Apart from conspiracy theories - there is no media coverage of this comet and there is no official announcement from NASA or the mainstream media - strange considering the celebration they made about Shumkar Levi...
The distance from the Earth is of course 2 million miles at the closest point to the Earth and not as above...
Why not send a spacecraft to photograph and study Comet Elenin?
It should pass here around November at a distance of 20,000 miles from Earth (according to NASA) - not worth checking out?
2 - Comets have a very flat elliptical orbit, therefore when they are far from the sun the rate of evaporation is low; Also, they usually have a strong magnetosphere that binds some of the vaporized particles to the comet. At the same time, they do "run out" within a few revolutions (depending on the orbit, the comet's mass, its composition, etc.), unless they crashed on the way to a planet or the Sun, or their mass was eroded to a brittle form until the comet disintegrated (as seems likely to happen to Hartley in the central belt).
water and carbon dioxide. You can open a soda water factory. Only there is a problem with the cyanide
A- Interesting.
B - The findings sound suspicious to me. An emission rate of about 200 kg per second is more than 200,000 cubic meters per year. Relatively to a 2 km long sausage, it should be eliminated in a very short time.
I would be happy to clarify the information. Thanks
Really fascinating.