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D-Archer Wrote:
-------------------------------------------------------
> mmm, it sounds like you have no idea what happens
> in space, or what has been reported about it over
> the years.
>
> I am done with you, this is my last reference to
> let you see how wrong you are and i quote you for
> posterity.
>
> Ianw16 said:And no asteroid has ever been seen
> to flare up

>
> Asteroid Sprouts Tails… Six of Them!:
> [www.slate.com]
>
> ---
>
> You can take the explanation of how/why this
> happened in the article and believe that, but
> photons are not massles, these are real impactors
> and they can charge up a rock in space, the
> sprouting tales is the discharge.
>
> Regards,
> Daniel


So, apart from the obvious obfuscation, let us look at these claims of Daniel's.
Firstly, protons and other ions are, indeed, not massless. They are, however, 1836 times more massive than electrons. This gives the electrons more mobility within the solar wind when they encounter an object, such as an asteroid. On the hemisphere facing the oncoming solar wind, not much is going to get charged by this process, as roughly equal numbers of both sign are going to hit it. However, on the side opposite the solar wind, it is easier for the electrons to impact. Therefore, the charging is mostly seen on that side, and is negative. On the other side you are likely to get a small + charge due to the photoelectric effect removing electrons from the surface. Neither of these charges are going to build up to the degree where there is going to be a 'discharge'. After all, the object is embedded within the solar wind, and any area that built up a substantial charge would attract particles of the opposite sign from the wind, and soon neutralise. Basic stuff, really.
Protons, and other heavier ions do cause sputtering on asteroid surfaces. This is a mechanical process, whereby the ion hits the surface and liberates atoms from the surface material. It was, in fact, measured at comet 67P early in the mission when the solar wind still had access to the surface. This doesn't last at comets though, as the outgassing volatiles eventually prevent the solar wind reaching the surface.

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Subject Views Written By Posted
Craters on Earths Moon 2491 ldennyjr 31-May-18 13:48
Perspective of Depth 456 Dr. Troglodyte 31-May-18 16:18
Re: Craters on Earths Moon 467 D-Archer 01-Jun-18 08:02
Re: Craters on Earths Moon 360 ianw16 05-Jul-18 09:36
Re: Craters on Earths Moon 375 David L 27-Jul-18 02:57
Re: Craters on Earths Moon 344 David L 27-Jul-18 03:03
Re: Craters on Earths Moon 342 D-Archer 27-Jul-18 09:29
Re: Craters on Earths Moon 335 ianw16 31-Jul-18 12:20
Re: Craters on Earths Moon 324 D-Archer 02-Aug-18 09:53
Crater formation simulation 347 Richard Fusniak 02-Aug-18 21:20
Re: Crater formation simulation 308 D-Archer 03-Aug-18 10:25
Re: Crater formation simulation 337 Richard Fusniak 04-Aug-18 07:34
Re: Crater formation simulation 303 D-Archer 04-Aug-18 08:27
Re: Crater formation simulation 301 ldennyjr 06-Aug-18 14:15
Re: Crater formation simulation 284 D-Archer 07-Aug-18 12:37
Re: Crater formation experiments 261 D-Archer 19-Aug-18 10:05
Re: Crater formation experiments 286 ianw16 23-Aug-18 13:49
Re: Crater formation experiments 261 D-Archer 24-Aug-18 08:46
Re: Crater formation experiments 282 ianw16 25-Aug-18 05:18
Re: Crater formation experiments 267 D-Archer 25-Aug-18 09:35
Re: Crater formation experiments 267 ianw16 25-Aug-18 09:44
Re: Crater formation experiments 267 D-Archer 26-Aug-18 09:07
Re: Crater formation experiments 281 ianw16 26-Aug-18 11:57
Re: Crater formation experiments 255 D-Archer 27-Aug-18 07:27
Re: Crater formation experiments 225 ianw16 27-Aug-18 12:17
Re: Crater formation experiments 230 D-Archer 27-Aug-18 13:16
Re: Crater formation experiments 228 ianw16 27-Aug-18 13:32
Re: Crater formation experiments 242 ianw16 27-Aug-18 13:48
Re: Crater formation experiments 235 ianw16 25-Aug-18 11:53
Re: Crater formation experiments 237 D-Archer 26-Aug-18 09:09
Re: Crater formation experiments 245 ianw16 26-Aug-18 12:01
Re: Crater formation experiments 229 D-Archer 27-Aug-18 07:31
Re: Crater formation experiments 241 ianw16 27-Aug-18 11:13
Re: Crater formation experiments 251 D-Archer 27-Aug-18 14:26
Re: Crater formation experiments 232 ianw16 27-Aug-18 14:32
Re: Crater formation experiments 234 D-Archer 27-Aug-18 14:45
Re: Crater formation experiments 239 ianw16 27-Aug-18 14:48
Re: Craters on Earths Moon 312 andy_mac_27 22-Sep-18 12:35
Re: Craters on Earths Moon 227 D-Archer 22-Sep-18 18:55
Re: Craters on Earths Moon 249 Lost_In_Place 22-Sep-18 23:14
Re: Craters on Earths Moon 273 D-Archer 23-Sep-18 10:25
Re: Craters on Earths Moon 249 Lost_In_Place 23-Sep-18 21:27
Re: Craters on Earths Moon 229 Eddie Larry 24-Sep-18 23:26
Re: Craters on Earths Moon 414 D-Archer 25-Sep-18 14:24


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