APOD: Twilight in a Western Sky (2018 Mar 31)

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APOD: Twilight in a Western Sky (2018 Mar 31)

Post by APOD Robot » Sat Mar 31, 2018 4:08 am

Image Twilight in a Western Sky

Explanation: A slender crescent Moon and inner planets Venus and Mercury never wander far from the Sun in planet Earth's skies. In the fading evening twilight of March 18, they line up near the western horizon in this atmospheric skyscape. While the celestial scene was enjoyed around the world, this photo captures the trio, with fainter Mercury at the far right, above the crags of Big Bend National Park in southwest Texas. Tonight the Moon will be full though, and rise opposite the Sun. Look for it high in the sky at midnight, near bright star Spica.

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De58te
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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by De58te » Sat Mar 31, 2018 7:09 am

"Look for it [tonight's Full Moon] high in the sky at midnight." Yes, but my question is what time do we look for it when we want to see it near the western sky near the crags of Big Bend National Park? My guess is 6 am?

heehaw

Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by heehaw » Sat Mar 31, 2018 9:55 am

Full moon is today, Saturday. My page, that I reprint an update of each day as my "reminder" calendar, has full moon as having occurred yesterday about 10 pm. The reason my calendar moon is slightly off is that in my fortran program that produces it, I just use the average lunar period, not taking into account the eccentricity. That is close enough for my purposes: see https://stardate.org/nightsky/moon

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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by orin stepanek » Sat Mar 31, 2018 11:45 am

Awesome Photo; today's APOD! Kudos to the Photographer! 8-) :D
Orin

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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by Chris Peterson » Sat Mar 31, 2018 2:07 pm

De58te wrote:
Sat Mar 31, 2018 7:09 am
"Look for it [tonight's Full Moon] high in the sky at midnight." Yes, but my question is what time do we look for it when we want to see it near the western sky near the crags of Big Bend National Park? My guess is 6 am?
Well, a full Moon always rises in the east near sunset and sets in the west near dawn, right?
Chris

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Sa Ji Tario

Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by Sa Ji Tario » Sat Mar 31, 2018 2:29 pm

For De5Bt, I think it refers to the local time, I understand that the Moon appears today on the horizon at 18.00hs local anywhere in the world and six hours after the end (24.00 local time)

Sa Ji Tario

Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by Sa Ji Tario » Sat Mar 31, 2018 2:39 pm

At 12:38 p.m. (UTC) the Moon will be full and I suppose that it will then be over the time zone "anti Green Wich"

Sa Ji Tario

Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by Sa Ji Tario » Sat Mar 31, 2018 2:48 pm

Sa Ji Tario wrote:
Sat Mar 31, 2018 2:39 pm
At 12:38 p.m. (UTC) the Moon will be full and I suppose that it will then be over the time zone India, China, Rusia

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neufer
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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by neufer » Sat Mar 31, 2018 4:25 pm

Chris Peterson wrote:
Sat Mar 31, 2018 2:07 pm
De58te wrote:
Sat Mar 31, 2018 7:09 am

"Look for it [tonight's Full Moon] high in the sky at midnight." Yes, but my question is what time do we look for it when we want to see it near the western sky near the crags of Big Bend National Park? My guess is 6 am?
Well, a full Moon always rises in the east near sunset and sets in the west near dawn, right?
Around equinox and away from the poles(; e.g., today near the crags of Big Bend National Park).

High latitudes around solstice are somewhat more complicated.
Art Neuendorffer

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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by BillBixby » Sat Mar 31, 2018 5:58 pm

orin stepanek wrote:
Sat Mar 31, 2018 11:45 am
Awesome Photo; today's APOD! Kudos to the Photographer! 8-) :D
I agree. :-)

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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by BillBixby » Sat Mar 31, 2018 6:06 pm

Big Bend, Texas, Moon set. One of these sources says 8:02 am, one says 8:03 am and one says 5:41 am. Perhaps one of them is correct?

Solar and Lunar tables for Big Bend National Park, TX. - WeatherForYou
https://www.weatherforyou.com/.../index ... park&state...

Big Bend National Park, TX, sunrise, sunset, moonrise, moonset, lunar periods and moon phase for March, 2018.
Moonrise, Moonset, and Moon Phase in Big Bend - TimeAndDate.com
https://www.timeanddate.com/moon/swaziland/big-bend

Moonrise and moonset time, Moon direction, and Moon phase in Big Bend – Swaziland for March 2018. When and where does the Moon rise and set?
Tonight's Moonrise, moon set and moon phases at Big Bend National ...
https://www.oorth.com/astronomy/moon/Un ... onal-Park/
Moonrise and moonset times at Big Bend National Park, Texas, United States. Table is showing moonrise, moonset and moon phases for next 7 days of the month March, 2018 . Different moon phases through out the month. Moon phases for a month. 2018. Moon Phase Detail. March. Date. Moon Phase. 9. 06:21.

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Re: APOD: Twilight in a Western Sky (2018 Mar 31)

Post by BDanielMayfield » Mon Apr 02, 2018 6:30 pm

APOD Robot wrote:
Sat Mar 31, 2018 4:08 am
the crags of Big Bend National Park in southwest Texas
are Carter Peak on the left and the southwest shoulder of the taller Vernon Bailey Peak on the right. This view (less this particular conjunction of course) is found along the Window hiking trial from the Basin parking lot or campground. I highly recommend this moderate hike to anyone in reasonable condition visiting BBNP.

Bruce
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