APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

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APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by APOD Robot » Mon Oct 27, 2014 4:06 am

Image Plane, Clouds, Moon, Spots, Sun

Explanation: What's that in front of the Sun? The closest object is an airplane, visible just below the Sun's center and caught purely by chance. Next out are numerous clouds in Earth's atmosphere, creating a series of darkened horizontal streaks. Farther out is Earth's Moon, seen as the large dark circular bite on the upper right. Just above the airplane and just below the Sun's surface are sunspots. The main sunspot group captured here, AR 2192, is one of the largest ever recorded and has been crackling and bursting with flares since it came around the edge of the Sun early last week. Taken last Thursday, this show of solar silhouettes was unfortunately short-lived. Within a few seconds the plane flew away. Within a few minutes the clouds drifted off. Within a few hours the partial solar eclipse of the Sun by the Moon was over. Only the sunspot group remains, but within a few more days even AR 2192 will disappear around the edge of the Sun. Fortunately, when it comes to the Sun, even unexpected alignments are surprisingly frequent.

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by Beyond » Mon Oct 27, 2014 4:57 am

Plane, Clouds Moon, Spots, sun. Why that's a smorgasbord of astrologicalisity!
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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by mtbdudex » Mon Oct 27, 2014 7:56 am

Doyle Slifer - One of the neatest image I've seen of the partial solar eclipse last week, kudos to you!
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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by starsurfer » Mon Oct 27, 2014 9:02 am

Beyond wrote:Plane, Clouds Moon, Spots, sun. Why that's a smorgasbord of astrologicalisity!
There is however a lack of a planetary nebula. :D :lol2:
This post is also dedicated to Judy Schmidt.

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by supamario » Mon Oct 27, 2014 1:33 pm

starsurfer wrote:
Beyond wrote:Plane, Clouds Moon, Spots, sun. Why that's a smorgasbord of astrologicalisity!
There is however a lack of a planetary nebula. :D :lol2:
This post is also dedicated to Judy Schmidt.
Not planetary nebula, but there almost could have been a planet. I was hoping the fuzzy dot to the left could have been mercury. That would have made it that more awesome.

tomatoherd

Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by tomatoherd » Mon Oct 27, 2014 1:52 pm

Does anyone have records and could determine if a sunspot almost as big as AR 2192 occurred sometime between Sept 1973 and May 1975 ??? I distinctly remember being outside one very misty morning in Junior High school for gym class, and you could look at the sun directly because of the mist, and I know I saw a sunspot. After looking at AR 2192 the other day thru xray film, it seems roughly the same size as my remote gym class discovery.

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by custargazer » Mon Oct 27, 2014 4:26 pm

mtbdudex - Thanks! It was a lucky shot, but what a dream come true. Funny. I saw your most active topic and I have a similar story. My wife totally encouraged me to grab my scope (even though my club had several already out there), she helped me with the iPhone getting it to stay in focus and then, she practically twisted my arm off to get me to submit it to APOD. She's embarrassed and doesn't want me to give her too much credit (publicly :ssmile:), but I seriously doubt she reads these forums (plus, I don't care - she's awesome!). :)

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by geckzilla » Mon Oct 27, 2014 5:03 pm

tomatoherd wrote:Does anyone have records and could determine if a sunspot almost as big as AR 2192 occurred sometime between Sept 1973 and May 1975 ??? I distinctly remember being outside one very misty morning in Junior High school for gym class, and you could look at the sun directly because of the mist, and I know I saw a sunspot. After looking at AR 2192 the other day thru xray film, it seems roughly the same size as my remote gym class discovery.
It's very likely that the records exist somewhere but it might also be very challenging to find it. Solar observation is an ancient astronomical pastime.
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tomatoherd

Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by tomatoherd » Mon Oct 27, 2014 6:42 pm

Thanks, Geck.
And I found some candidates: Under "solar cycle 20" in wikidepia, the top right photo, "solar magnetogram from solar cycle 20 (1974)" has a verge large sunspot in blue, the top left-most, and looks every bit as big or bigger than AR 2192. Unless of course, these magnetograms are not using visible light, and so it's apples & oranges.
And the lower photo shows 'one of the largest solar flares ever recorded' in Dec. 1973. Maybe several days before that photo we'd have seen a large sunspot there....

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by NGC3314 » Tue Oct 28, 2014 4:42 am

There is a file of daily sunspot numbers (a visual average with groups counting more) here. From 1973-1975, the highest peak (comparable to recent numbers) is at 1973.68, followed pretty closely by 1974.77 and 1975.59. The middle one fits your date range (would be about May 17, 1974).

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by geckzilla » Tue Oct 28, 2014 7:41 am

NGC3314 wrote:1973.68, followed pretty closely by 1974.77 and 1975.59
I love this fractional method of dates.
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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by rstevenson » Tue Oct 28, 2014 1:39 pm

Ack! Metric dates!

Rob

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by Chris Peterson » Tue Oct 28, 2014 2:05 pm

geckzilla wrote:
NGC3314 wrote:1973.68, followed pretty closely by 1974.77 and 1975.59
I love this fractional method of dates.
Like the Julian day, but counting by years rather than days. That's a nice baseline for sunspot records.
Chris

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by Chris Peterson » Tue Oct 28, 2014 2:08 pm

rstevenson wrote:Ack! Metric dates!
I didn't larn me no decimals in my Murican school. When whar dem sunspots in fortnights?
Chris

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Re: APOD: Plane, Clouds, Moon, Spots, Sun (2014 Oct 27)

Post by owlice » Tue Oct 28, 2014 5:58 pm

tomatoherd wrote:After looking at AR 2192 the other day thru xray film
Please get eclipse glasses; you can get them online. Or view safely using a projection method.
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