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  • The Earth looks nothing like this

    From Gerald Kelleher@21:1/5 to All on Thu Feb 23 01:40:21 2023
    https://epic.gsfc.nasa.gov/

    Viewed from the orbital plane, the Earth's rotational orientation would actually run Southwest to Northeast just as on the September Equinox, it runs from Northwest to Southeast-

    https://en.wikipedia.org/wiki/Deep_Space_Climate_Observatory#/media/File:EpicEarth-Globespin-tilt-23.4.gif

    It is criminal that they would distort imaging to show the Earth with no daily rotational inclination-

    https://epic.gsfc.nasa.gov/galleries/2022/high_cadence/video

    Of course, they also show the March Equinox with a pivoting circle of illumination and a planet with no inclination-

    https://earthobservatory.nasa.gov/images/52248/seeing-equinoxes-and-solstices-from-space

    Everything but the right image in order to demonstrate that the North and South poles ( and the entire surface) traverse the light and dark hemispheres as they turn parallel to the orbital plane.

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  • From Quadibloc@21:1/5 to Gerald Kelleher on Thu Feb 23 16:19:53 2023
    On Thursday, February 23, 2023 at 2:40:24 AM UTC-7, Gerald Kelleher wrote:

    Of course, they also show the March Equinox with a pivoting circle of illumination and a planet with no inclination-

    https://earthobservatory.nasa.gov/images/52248/seeing-equinoxes-and-solstices-from-space

    For the other images, showing the Earth with or without an inclination depends on
    the perspective being sought. If the perspective is one of the whole Solar System,
    or the Earth's orbit, it makes sense to show it from the viewpoint of the Ecliptic plane.

    If the perspective is from that of the people on the ground, though, then putting North
    at the top makes sense.

    But while I didn't agree with your _other_ examples, this final one is on a page that is
    devoted to *explaining the reason for the seasons*. While it could be argued that a
    North at the top perspective still is appropriate, since this way it shows the Northern
    Hemisphere gets less light as the terminator, the line between light and dark, tilts
    away from it... what about the reason why that had happened?

    So in this last example, I'm inclined to agree that you have a valid complaint. Something
    is missing.

    But I also think I understand why they did it that way. They're using photos of the
    actual Earth, where the continents are hidden by clouds. Not a diagram of a globe,
    with latitude and longitude lines, in addition to the coastlines of the continents
    all drawn on it, and easy to see. So it isn't _obvious_ if they show the Earth tilted
    that it even _is_ tilted. By leaving the Earth with North at the top, then the way the
    light and dark halves move around is obvious.

    John Savard

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  • From Quadibloc@21:1/5 to Quadibloc on Thu Feb 23 16:35:26 2023
    On Thursday, February 23, 2023 at 5:19:55 PM UTC-7, Quadibloc wrote:
    On Thursday, February 23, 2023 at 2:40:24 AM UTC-7, Gerald Kelleher wrote:

    Of course, they also show the March Equinox with a pivoting circle of illumination and a planet with no inclination-

    https://earthobservatory.nasa.gov/images/52248/seeing-equinoxes-and-solstices-from-space
    For the other images, showing the Earth with or without an inclination depends on
    the perspective being sought. If the perspective is one of the whole Solar System,
    or the Earth's orbit, it makes sense to show it from the viewpoint of the Ecliptic plane.

    If the perspective is from that of the people on the ground, though, then putting North
    at the top makes sense.

    But while I didn't agree with your _other_ examples, this final one is on a page that is
    devoted to *explaining the reason for the seasons*. While it could be argued that a
    North at the top perspective still is appropriate, since this way it shows the Northern
    Hemisphere gets less light as the terminator, the line between light and dark, tilts
    away from it... what about the reason why that had happened?

    So in this last example, I'm inclined to agree that you have a valid complaint. Something
    is missing.

    But I also think I understand why they did it that way. They're using photos of the
    actual Earth, where the continents are hidden by clouds. Not a diagram of a globe,
    with latitude and longitude lines, in addition to the coastlines of the continents
    all drawn on it, and easy to see. So it isn't _obvious_ if they show the Earth tilted
    that it even _is_ tilted. By leaving the Earth with North at the top, then the way the
    light and dark halves move around is obvious.

    On further reflection, what they _should_ have done is obvious.

    The pictures of the Earth that they used - with North at the top - are okay as _one element_
    of such a page. But those pictures have exactly the same information as pictures that could have
    been taken on the ground, without fancy satellites. So _those_ pictures should have also been
    present.

    The picture showing the line between light and dark inclined so that the Arctic regions are lit
    should have been accompanied by a picture on Earth from a Northern Hemisphere location showing
    the noonday sun high above the horizon - in the summer.

    The picture showing that line inclined the other way should have been accompanied by a picture showing
    the noonday sun very low on the horizon - in the winter.

    And the accompanying text should have explained that the two pictures are showing the same thing,
    from different views.

    And then, to answer the question of why that happens, show this from the Ecliptic perspective.

    For that, instead of tilting the satellite photos, the kind of diagram of the equinoxes and solstices
    which appears in old school atlases would be clearer and do a better job. Because, as I noted,
    latitude and longitude lines aren't visible on a satellite photo of the Earth.

    John Savard

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  • From palsing@21:1/5 to Quadibloc on Thu Feb 23 19:31:39 2023
    On Thursday, February 23, 2023 at 4:35:28 PM UTC-8, Quadibloc wrote:

    The picture showing the line between light and dark inclined so that the Arctic regions are lit
    should have been accompanied by a picture on Earth from a Northern Hemisphere location showing
    the noonday sun high above the horizon - in the summer.

    The picture showing that line inclined the other way should have been accompanied by a picture showing
    the noonday sun very low on the horizon - in the winter.

    ... and if they took a picture from the same locations every couple of days for a full year they would not only be showing the Sun high in the summer and low in the winter, they would also show a big beutiful annalema!

    https://www.google.com/search?q=annalema+picture&rlz=1C1GTPM_enUS1017US1018&sxsrf=AJOqlzW6hk5FjxLJilMPhSaiLeEh_GwHNQ:1677209425070&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiw2vr_m639AhW0h-4BHWscAbEQ_AUoAXoECAEQAw&biw=1536&bih=809&dpr=2.5

    This, of course, might make Gerlald's brain explode...

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  • From Gerald Kelleher@21:1/5 to All on Fri Feb 24 02:18:15 2023
    All those previous images came from the NASA organisation and, apart from the September Equinox time-lapse, were manipulated to generate contrived narratives, and therein is the problem.

    If there were productive and creative personnel at NASA, they would demonstrate what the Earth looks like from the orbital plane so that by the March Equinox, the rotational orientation runs Southwest to Northeast relative to the orbital plane and
    opposite to the September Equinox-

    https://en.wikipedia.org/wiki/Deep_Space_Climate_Observatory#/media/File:EpicEarth-Globespin-tilt-23.4.gif

    Only on the December/June Solstices does the Earth appear to move as promoted by the Dscovr/ Epic website-

    https://www.youtube.com/watch?v=-OgLCH7jYp8

    Only the March Equinox is missing, and that can be easily rectified if those highly paid individuals were doing their jobs

    It follows from the observable principle that the Earth turns in two separate ways to the Sun and the Earth's divisor. One is a property of daily rotation, while the other is a property of the specific way the Earth and other planets orbit our parent
    star.

    https://www.youtube.com/watch?v=612gSZsplpE

    I know all too well that there are people who can sit at a desk and be unproductive their entire day or working career while others are actually interested in contributing to society. I never complain on this account, for my influence extends no further
    than this forum which I would not trade for anything; after all, the moderated/monetised forums only address the unhealthy relationship between RA/Dec observers and theorists operating out of the same framework.

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