Strange Posted December 24, 2015 Posted December 24, 2015 ...at 1AU Earth has solar pressure at the average level of .9.08 Pa That is 9.08 MICRO pascals. And the variations in that pressure will be even smaller (hence nanopascals). Sheesh. In talking about the effects, that article describes it as "feeble". A large enough comet, coming in at enough velocity and on a trajectory crossing Earth's path will perturb its orbit and send out vibrations through its lithosphere and outer plates. This will produce tectonic activity on such habitable worlds... Do you have any evidence to support this? [...and this motion in space has little to do with the amount of Earth's atmospheric pressure, other than when the shock wave comes in through it...] This "shock wave" is less than a billionth of the atmospheric pressure. I don't think anyone is going to notice that. It would be like stroking a supertanker with a feather. Read up on the effects on the atmosphere from Comet Siding Spring as it passed close by Mars and how NASA had to "hide" their probes from the comets path- http://mars.nasa.gov/comets/sidingspring/ You have absolutely no concept of scale do you? That was really close, a few thousand miles. Close enough to scatter dust in the atmosphere. As opposed to your comet which you claim was hundreds of millions of miles away. [This, pretty much, proves my point, no?] It pretty much proves you don't have a clue.
Kalopin Posted December 24, 2015 Author Posted December 24, 2015 (edited) That is 9.08 MICRO pascals. And the variations in that pressure will be even smaller (hence nanopascals). Sheesh. In talking about the effects, that article describes it as "feeble". Do you have any evidence to support this? This "shock wave" is less than a billionth of the atmospheric pressure. I don't think anyone is going to notice that. It would be like stroking a supertanker with a feather. You have absolutely no concept of scale do you? That was really close, a few thousand miles. Close enough to scatter dust in the atmosphere. As opposed to your comet which you claim was hundreds of millions of miles away. It pretty much proves you don't have a clue. That's not a measurement of disturbed pressure, but an average or normal pressure... No, I claim that Comet C/1811 F1 was much closer than the suggested orbital elements, as it was seen as one and a half times the size of the Sun [that's not a measurement, it's an observation!]... Yes, I have evidence and just gave you plenty [shoemaker/Levy, Siding Spring] Did you not see the effects from the close passing of these comets? [i would think- wouldn't take a "Sherlock", uh Watson? ;-] Dendrochronologist Mike Baillie's work- http://www.sott.net/article/145683-New-Light-on-the-Black-Death-The-Cosmic-Connection https://en.wikipedia.org/wiki/Mike_Baillie ...see what the findings are from the close passing of comets and tree ring data and how they coincide with so many socioeconomic and environmental downturns... "...the odd thing is, even though Bailie points out that many high level scientists and government agencies are taking these things very seriously,...it is still ignored, marginalized and ridiculed to the general public via the mainstream media! Baillie writes-..." Please read its entirety... thanks {one for you Strange- http://cosmoquest.org/forum/archive/index.php/t-130354.html;-] Edited December 24, 2015 by Kalopin -2
Strange Posted December 24, 2015 Posted December 24, 2015 That's not a measurement of disturbed pressure, but an average or normal pressure... And the changes in pressure would be much smaller. But even if the changes in pressure in these shock waves were 100 or 1000 times larger than the average pressure it will still have no effect on the dense atmosphere. These changes in pressure you depend on are taking place in a hard vacuum. (I don't know why you bother to link to one of your many threads where you fail to provide any evidence. That one was at least shut down mercifully quickly.)
swansont Posted December 24, 2015 Posted December 24, 2015 "Solar radiation pressure is a source of orbital perturbations...", "...Spacecraft are affected along with natural bodies [comets, asteroids, dust grains, gas molecules]..."- https://en.wikipedia.org/wiki/Radiation_pressure ...at 1AU Earth has solar pressure at the average level of .9.08 Pa No, that's not what the link says. The heading is micropascals (the wikipedia page I read said nano, but no matter. It's still tiny) micro is 10^-6 A large enough comet, coming in at enough velocity and on a trajectory crossing Earth's path will perturb its orbit and send out vibrations through its lithosphere and outer plates. This will produce tectonic activity on such habitable worlds... Where did you come up with "a few nanopascals"? [...and this motion in space has little to do with the amount of Earth's atmospheric pressure, other than when the shock wave comes in through it...] The shock wave is coming from the comet as it passes through Earth's orbital path... https://en.wikipedia.org/wiki/Solar_wind "The wind exerts a pressure at 1 AU typically in the range of 1–6 nPa (1–6×10−9 N/m2), although it can readily vary outside that range." Here's a little science for you. Let's compare this to a human standing. If you have a mass of around 100kg, you exert a force of around a kilonewton. Let's say you have big feet, and we'll use a square meter as your foot area, so we make a conservative estimate. That's a kilopascal you are exerting on the earth - 100 million times larger pressure than the solar wind. When you lift up one foot to walk, you double that pressure. (When your foot lands, it will have an impact even larger) So we should be causing earthquakes every day by walking around, if shock waves in the solar wind can cause them. Read up on the effects on the atmosphere from Comet Siding Spring as it passed close by Mars and how NASA had to "hide" their probes from the comets path- http://mars.nasa.gov/comets/sidingspring/ "...added a temporary and very strong layer of ions to the ionosphere..."- observations from MAVEN, MRO and ESA probes, see- http://mars.nasa.gov/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1749 [This, pretty much, proves my point, no?] [of interest-] the effect of sonic booms from a [tiny] F-4 aircraft- http://scrippsscholars.ucsd.edu/jahildebrand/content/field-measurements-sonic-boom-penetration-ocean-0 "...into the ambient noise field by 30-50 m, depending on the strength of the boom..." [comets send out much lower frequencies with much higher intensities] Prove your point? No. I think this is the "any port in a storm" effect. You see a few key words and think that these articles support your position, but you obviously don't understand the science (including the scale) involved and why they don't.
Phi for All Posted December 24, 2015 Posted December 24, 2015 ! Moderator Note Kalopin, it seems clear you aren't ready to defend this idea with the minimum rigor we expect in our Speculations section. I'm closing this, so please don't open the subject again unless you can dig a bit deeper to support the conclusions you've made.
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