|Today's doodle on Earth day is INCORRECT||Anuradha Bhagwat||4/21/13 10:02 PM|
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Today's doodle on Earth day is INCORRECT. The moon rsing should have its lighted part towards the sun. It is shown opposite, and hence INCORRECT.
Please let me know when you have corrected it.
And warm regards,
|Re: Today's doodle on Earth day is INCORRECT||Storms||4/22/13 1:53 AM|
Good catch but Doodles are done far in advance and with the work to make it interactive I will bet that they will not change the Doodle. It will stay as is, I think it is cool that you caught a human error and how smart are you for that. Congrats.
|Re: Today's doodle on Earth day is INCORRECT||Michael Nesbitt||4/22/13 10:45 AM|
Essentially correct, but not quite.
Keep in mind that it is the Earth's own rotation that is important in seeing the cosmos through the night, with the Moon's proper motion repositioning it, slowly, through its various orientations to the Sun.
The whole association is incorrect, as the motions of moon and sun in the doodle are oriented to a full-moon position: the sun sets as the moon rises, and the moon sets as the sun rises.
Appearance of the Moon after "full" are more reflective (no pun intended) of the position shown, as the Moon moves closer in its orbit to the moment of sunrise. Once past 3rd-quarter position, it appears as a declining crescent phase before New Moon, at which it is, relatively, in line with the Sun and unseen (save, of course, for eclipses).
The other problem is that the obscure part of the moon's disc is transparent in the doodle, with star-points shining until they are occulted by the lighted crescent.
Which brings up another problem, in that the stars are fixed, making the moon seem like it is moving on its own in the direction opposite to its actual motion. It is the Earth's rotation that makes the cosmos seem to pass across our view each night, and the background stars should move with the foreground Moon, save the small proper motion of the Moon in the opposite direction (though Google could be forgiven that minor adjustment, as most people don't register it anyway, on a daily - or nightly - basis).