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Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE !
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In accordance with industry accepted best practices we ask that users limit their copy / paste of copyrighted material to the relevant portions of the article you wish to discuss and no more than 50% of the source material, provide a link back to the original article and provide your original comments / criticism in your post with the article.
[quote:Anonymous Coward 61432111:MV8yNTk4OTk2XzQ1ODk1MjAxXzY1QkMyQTgx] [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODgzNTU1XzJFMjdBMzQ=] [quote:K Hall:MV8yNTk4OTk2XzQ1ODgzMDU4XzdBOThDNDYy] [b]I remember some guy saying "I'm not going to post any videos or ramble about EU going forward here." If you want to talk about electrickery, keep it relevant to Rosetta and comet 67P. This is not a general electrickery thread.[/b] K [/quote] And certain asteroids can become live comets as was discovered last year with the 6-tailed asteroid/comet. [/quote] Yes, I have posted somewhere before about Iwan Williams and the safari park. http://astrogeo.oxfordjournals.org/content/38/3/23.full.pdf [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODgzNTU1XzJFMjdBMzQ=] At least the vid I posted was only 13 minutes long. There is an 80 minute one that goes into great detail about EDM and Mars ... if you're interested. It's referenced in the 13 min vid I posted. [/quote] Lol, thanks but no thanks. I have a whole series of vids on tensor calculus and Riemann surfaces if you are having trouble sleeping. https://www.youtube.com/watch?v=e0eJXttPRZI [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODg0MTA0XzkyNEMyRTgy] From a standard theory standpoint how exactly does a comet with a fuzzy watery coma cause auroras?? [/quote] BG-Fan, are you seriously telling me that you don't think the electrical and magnetic properties of comets have been studied over the last 150 years. I think you need the kids book of comets or something. 1852 William Swan produced diatomic carbon spectra that matched William Huggin's comet coma spectra, so we have know for at least 152 years that outer comas contain ionised material, please catch up. As to under what circumstances this could or could not cause auroras that is beyond the ability of anyone here to calculate. This McCanney guy is picking up on what JPL were saying over a year and a half ago, RE auroras. http://www.fromquarkstoquasars.com/will-mars-be-hit-by-a-comet-the-revised-estimate/ http://www.gizmag.com/comet-c2013-a1-mars/26472/ [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODg5MTA2XzhFMjg5Nzcz] And yes according to standard theory they rely a great deal on magnetism while almost completely ignoring electrical conditions all together. [/quote] Wow, you really need to catch up on your 19th century science. https://www.boundless.com/physics/textbooks/boundless-physics-textbook/induction-ac-circuits-and-electrical-technologies-22/magnetic-flux-induction-and-faraday-s-law-161/faraday-s-law-of-induction-and-lenz-law-569-6693/ [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODg5MTA2XzhFMjg5Nzcz] So given that Mars basically has no magnetosphere, it makes the Martian aurora claim all the more fantastical from standard theory, doesn't it? [/quote] No, what you need for aurora is collisions of differing gasses ( ionised and donors ) in a low gas pressure environment with ionised gasses that have de-excitation spectra in the visible range. No need for a magnetosphere. Why would it be fantastical when it is scientists using their knowledge and skills that are predicting this. [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODg5MTA2XzhFMjg5Nzcz] [quote:Hydra:MV8yNTk4OTk2XzQ1ODg0NjA0Xzk3MDMzODA3] [quote:BG-Fan:MV8yNTk4OTk2XzQ1ODg0MTA0XzkyNEMyRTgy] Last week Nasa announced that Siding Spring........and on and on [/quote] [/quote] [/quote] Seriously why didn't you post this in Dr Astro's Siding Spring thread or better yet one of your own. I have already asked you to keep on topic, you are a regular poster so you know what is going on here, I am fine about you posting about Rosetta and 67P eletrickery stuff as I have already said. We had something like 3,400 threads on crappy comet ISON that did nothing then fell apart. Is it too much to ask to have one active thread on the most exciting and interesting space mission of the century so far, that is going to revolutionise our understanding of comets, is it really ??? K [/quote] [/quote]
Original Message
I want to use this thread to highlight news from the Rosetta comet mission.
Ten years ago the European Space Agency ( ESA ) launched the Rosetta comet chaser to rendezvous with comet 67P, go into orbit around it and land a probe on its surface.
120 Icy Patches - by last September
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 69)
thanks FBVA
Philae Phones Home
Great news, thanks F-BVFA
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 68)
Ceres fly over video
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 67)
New Coma Discovery
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 67)
Pictures MOTHER LODE !
- There are
hundreds
thousands of images from Rosetta, this post will always point to the most recent NAVCAM or OSIRIS picture. Updated several times per week. ( Thanks F-BVFA )
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 67)
Ceres Spot Shot
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 66)
Potato
Thread: Rosetta Comet Orbiter -** 120 Icy Patches ** Philae Phones Home ** Ceres Fly Over Video ** New Coma Discovery ** Picture MOTHER LODE ! (Page 66)
When the Rosetta mission is complete we will know so much more about comets, their composition and formation. Comets have been a cause of fear and fascination throughout human history, within the next few months many long standing mysteries will be solved.
K
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