APOD: August's Lunar Eclipse (2017 Aug 09)

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APOD: August's Lunar Eclipse (2017 Aug 09)

Post by APOD Robot » Wed Aug 09, 2017 4:07 am

Image August's Lunar Eclipse

Explanation: August's Full Moon is framed in this sharp, high dynamic range composition. Captured before sunrise on August 8 from Sydney, Australia, south is up and the Earth's dark, umbral shadow is at the left, near the maximum phase of a partial lunar eclipse. Kicking off the eclipse season, this time the Full Moon's grazing slide through Earth's shadow was visible from the eastern hemisphere. Up next is the much anticipated total solar eclipse of August 21. Then, the New Moon's shadow track will include North America, the narrow path of totality running coast to coast through the United States.

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Re: APOD: August's Lunar Eclipse (2017 Aug 09)

Post by Boomer12k » Wed Aug 09, 2017 5:06 am

Nice pic...

Should be interesting to see all of the variations of the Solar Eclipse from Coast to Coast...

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Re: APOD: August's Lunar Eclipse (2017 Aug 09)

Post by isoparix » Wed Aug 09, 2017 8:10 am

My wife said to tell him to get his thumb out of the way of the lens next time...


Re: APOD: August's Lunar Eclipse (2017 Aug 09)

Post by heehaw » Wed Aug 09, 2017 9:15 am

I always look at ESPOD after APOD, and today ESPOD is a nice picture of Lyra. Then I tried googling Lyra APOD: interesting!


Re: APOD: August's Lunar Eclipse (2017 Aug 09)

Post by zumbinis » Wed Aug 09, 2017 3:48 pm

I posted this comment about this image on your Facebook post just now. Except for not using the terms preceding and following Limb, which I wasn't sure how to correctly apply to the image into my thought experiment, are my comments correct? I believe they are but can you correct me if they are not? Thanks in advance.

Another proof that the Earth is round (in fact, an example of one of the first ever empirical proofs of that fact seen and understood by the ancients): Earth's curved shadow touches and crosses the Moon. And at the eclipse continues and the shadow later leaves the Moon, if the shadow is well-centered, an observer would see that the shadow is completely circular and be able to deduce that the source of the Shadow, the Earth, is round and a sphere.

If the ancient Observer lived north of Earth's equator and was familiar with the hourly, daily and monthly look of the Moon from that vantage point, but somehow traveled to Australia to view the Moon and take this image, then he might also make note of several more clues that the Earth is round: the moon still rises in the East and sets in the West, but it is now high in the North rather than the South relative to his position when it is at its highest position above the the horizon each night . This is especially noticeable when the Moon is full and in the sky all night. It is also inverted, compared to his familiar Northern view. Finally, Mare Crisium ( the small, dark oval lunar "sea" at the Moon's lower limb in this image) is also on the moon's lowest limb upon rising, rather than at the Upper Limb in the northern hemisphere View.