• (disco) in reply to hungrier
    hungrier:
    But what if the goat is lying?

    Try and get it to stand up?

  • (disco) in reply to hungrier
    hungrier:
    But what if the goat is lying?

    Resume trying to deal with the issue in your next incarnation.

  • (disco) in reply to Jaloopa
    Jaloopa:
    How far away would a pixel the size of the Earth be?

    Interestingly, it's a bit under a quarter of an Astronomical Unit (AU). Curiously, the planet Venus's closest approach brings it within around 0.5AU of Earth, so that means Venus is smaller than a pixel (since we know its diameter is around that of Earth) despite the fact that its crescent is visible with the naked eye. (Well, provided I have my glasses on. :eyeglasses:)

    CSS pixels are too large. And have too much poisonous gas too.

  • (disco) in reply to dkf
    dkf:
    Interestingly, it's a bit under a quarter of an Astronomical Unit (AU).

    Why is that interesting, when compared with any other distance it may have been, or using any other unit of measurement?

    dkf:
    Venus is smaller than a pixel

    A picture of Venus (larger than actual size): .

  • (disco) in reply to another_sam
    another_sam:
    Why is that interesting

    It's a distance that's easier to comprehend than “lots of millions of kilometers” (despite being ostensibly the same thing) because people stumble over the whole “millions” business. And I thought it was interesting.

    I'm a bit tired. :smiley:

  • (disco) in reply to Jaloopa
    Jaloopa:
    How far away would a pixel the size of the Earth be?

    http://what.thedailywtf.com/t/you-know-youve-been-spending-too-much-time-on-tdwtf-when/2603/234

    Courtesy of @tar who originally linked the article.

    "Of the 640,000 individual pixels that compose each frame, Earth takes up less than one (0.12 pixels, according to NASA)"

    So, 6 Billion km @ .12 pixels = 720 million km away for the Earth to be about 1 pixel in size.

    dkf:
    Interestingly, it's a bit under a quarter of an Astronomical Unit (AU).

    My numbers above say almost 5 full AUs. Where did you find your data? I'm curious because it may be more accurate; not sure how NASA can determine the blue dot of Earth being 0.12 pixels, since a pixel is one unit of image resolution by definition. Not sure how you can determine a fraction of a pixel.

  • (disco) in reply to redwizard
    redwizard:
    not sure how NASA can determine the blue dot of Earth being 0.12 pixels, since a pixel is one unit of image resolution by definition.

    This thing is this close and takes this many pixels. Earth is this much smaller and this much further away, so it's only the matter of crunching numbers.

  • (disco) in reply to redwizard
    redwizard:
    My numbers above say almost 5 full AUs. Where did you find your data? I'm curious because it may be more accurate; not sure how NASA can determine the blue dot of Earth being 0.12 pixels, since a pixel is one unit of image resolution by definition. Not sure how you can determine a fraction of a pixel.

    Diameter of earth: 12,742 km (according to Google)

    Size of pixel: 77 arcseconds

    77 arcseconds = 0.000373306534 radians (again, according to Google)

    12742 km ÷ 0.000373306534 = 34132808.122639107 km (I know, stupid precision; I keep it here because I was cut-n-pasting) Note that the difference between that angle and the sine or tangent of that value is miniscule. Radians are definitely God's own angular scale.

    34132808.122639107 km = 0.22816373 AU (again, according to Google)

    In short, we're talking a little bit under a quarter of an AU. Venus's mean orbital distance is about half that of ours (and ours is 1 AU by definition) so when it's closest, it's going to be around half an AU away and at it's furthest it'll be 1.5 AU, i.e., 2 to 6 times the distance at which it would cover a pixel, and so covering 1/4 to 1/36 of a pixel (inverse square).

    OOOOOooobvious!

  • (disco) in reply to anotherusername

    Yeah, that's how I got there (thinks: "it's this wide at this distance, and if it's twice as far away it looks half as wide...").

  • JFig (unregistered)

    https://irongamers.ru/sale/key/3154411

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