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  • George's Avatar
    Yesterday, 02:15 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Yes, and I suspect about 2/3rds of the energy is in that 2/3rds of the spectrum as well. A 5772K value will give the same luminosity as the Sun, but...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-17, 08:06 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Let me know what you think of the following. I favor 5850K for a better BB match, no that it matters much, I suppose. BTW, do you have a...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-14, 05:37 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Hmmm, I get 6,928K to match the photon flux at 390nm with 750 nm. I will double check my Planck equation work and conversions to see if I might...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-14, 03:40 PM
    George replied to a thread Sun Color Challenge in Astronomy
    I'm not familiar, being an amateur after all, with the filter use for clusters. I assume that the blue and red filters are the common choices used,...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-13, 08:18 PM
    George replied to a thread Sun Color Challenge in Astronomy
    At the risk this will exacerbate the color problem, take a look at today's APOD. Isn't it possible some will look at the B-R results and falsely...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-13, 06:47 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Yep, and the power of color constancy that pushes the brain toward white for the brightest light source is worth remembering. Yet this white push is...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-13, 04:19 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Has color pedantry died? Have I underestimated the solar color question fatigue? Admit it, I have been self-restrained for quite a while, after...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-13, 01:27 AM
    George replied to a thread Sun Color Challenge in Astronomy
    “George!” should work. But you can shout any solar color question to find me, unless it’s a solar physicists’ convention. Come to think of it,...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 08:50 PM
    George replied to a thread Superflares on the Sun in Astronomy
    Thanks for the estimate. That's plenty of time if they are prepared.
    17 replies | 288 view(s)
  • George's Avatar
    2019-Jun-12, 08:43 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Yes, and stars, of course, will do the same. I have wondered if a reasonable particulate count could be determined by noting the change in tint for...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 05:25 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Is this dusty thread it? Here
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 04:52 PM
    George replied to a thread Sun Color Challenge in Astronomy
    So to help someone or some two get an ice cream sundae.... Take the first one.... "The Sun emits a lot of energy in the visible range. In...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 04:26 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Yes, when pollen, aerosols, dust, etc. pile-up, so to speak, in the atmosphere then a great deal of additional scattering takes place, scattering...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 04:21 PM
    George replied to a thread Superflares on the Sun in Astronomy
    Any idea how much time the nauters (astro, cosmo, etc.) would have to return to Earth if in LEO? The particle blast speed would be very high no...
    17 replies | 288 view(s)
  • George's Avatar
    2019-Jun-12, 02:20 PM
    George replied to a thread Sun Color Challenge in Astronomy
    I had thought about offering the standard prize of this board -- an ice cream sundae. Hmmm. Okay I think I will do so for the first two people who...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 01:21 PM
    George replied to a thread Sun Color Challenge in Astronomy
    Do you mean orangish-yellow? It usually requires afternoon air turbulence to bump the particle count high enough to produce the extra scattering...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-12, 01:14 PM
    George replied to a thread Sun Color Challenge in Astronomy
    I would likely shout, "Yes!" If you are looking at it then it would necessarily have to be at least a saturated yellow to allow direct observation....
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-11, 09:20 PM
    George started a thread Sun Color Challenge in Astronomy
    More fun with the color of the Sun… It seems like a long time since any salvo has been shot at this subject... perhaps. What is interesting and...
    34 replies | 705 view(s)
  • George's Avatar
    2019-Jun-11, 08:03 PM
    George replied to a thread Superflares on the Sun in Astronomy
    Is that because a Bruce Willis can't stop the thing? Still, human struggle would be great enough to fit most Hollywood movies, no doubt. Bueno...
    17 replies | 288 view(s)
  • George's Avatar
    2019-Jun-11, 07:34 PM
    George replied to a thread Superflares on the Sun in Astronomy
    Yeah, I can see why it would potentially make an exciting story; one can find a lot of drama in dramatic events! There was an odd statement in...
    17 replies | 288 view(s)
  • George's Avatar
    2019-Jun-11, 06:54 PM
    George replied to a thread Superflares on the Sun in Astronomy
    The Carrington Flare (1859) is estimated to have been about 5 x 1032ergs. So a superflare is about 100x this big one. Super ouch! It's interesting...
    17 replies | 288 view(s)
  • George's Avatar
    2019-May-31, 08:48 PM
    Is that correct? The arms, IIRC, are density waves, like a heavy traffic on the highway that slows everyone down. Is this a traffic jam we somehow...
    449 replies | 11032 view(s)
  • George's Avatar
    2019-May-31, 08:25 PM
    An attempt to accomplish this happened in Oregon one year earlier (June 8,1918) by Samuel Mitchell, et. al. but clear skies were no where in sight.
    1 replies | 110 view(s)
  • George's Avatar
    2019-May-29, 05:45 PM
    Given your likely aversion for puns, - the 12 hours is strong evidence for such, and probably to your credit — and the convoluted manner of its...
    3953 replies | 676055 view(s)
  • George's Avatar
    2019-May-28, 08:30 PM
    This also applies to major impacts especially for the KT event. I'm not that familiar with many details but some have argued that volcanic activity...
    6 replies | 322 view(s)
  • George's Avatar
    2019-May-28, 04:38 PM
    (my bold) Just to eshoe ofuscation, this wasn’t intentional, right? :) iphone
    3953 replies | 676055 view(s)
  • George's Avatar
    2019-May-28, 04:18 PM
    Is it just me, or is this helioseismology 101? If, as they state, 10% of the data show this result, how could this be something to write about,...
    6 replies | 322 view(s)
  • grapes's Avatar
    2019-May-26, 09:52 AM
    Worse, we know that the electron, the closest thing to a point particle (when it is a particle), has a magnetic moment. The electron magnetic moment...
    33 replies | 1059 view(s)
  • grapes's Avatar
    2019-May-26, 09:32 AM
    grapes replied to a thread SpaceX in Space Exploration
    Just how bright are these objects, and how bright will they be in higher orbit? ...
    2076 replies | 391068 view(s)
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5 Visitor Messages

  1. View Conversation
    Hi George,

    hidden in plain sight- LOVE IT! You are obviously a fan of 60's spy trillers and crypography in general. Why don't you write rude comments to people in white?.. interspersed between your polite comments...

    Plant
  2. View Conversation
    Dear George

    Thanks for the message of January 2010. Sorry for not replying earlier. I have been very busy recently and have been neglecting the forum. I must try and visit more often. I appreciate the mention in your article, though I hardly deserve it.

    Best wishes

    Brendan.
  3. Thanks, and welcome to the forum. You have stimulating posts.
  4. View Conversation
    Have a good one
  5. View Conversation
    Belated happy birthday, George
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About George

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We know time flies, we just can't see its wings.

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