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APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 4:09 am
by APOD Robot
Clouds of Earth and Sky
Explanation: If you go high enough, you may find yourself on a picturesque perch between the water clouds of the Earth and the star clouds of the Milky Way. Such was the case last month for one adventurous alpinist astrophotographer.
Captured here in the foreground above white clouds are mountain peaks in the
Dolomite range in northern
Italy. This multi-exposure image was captured from
Lagazuoi, one of the Dolomites. Hundreds of millions of years ago,
the Dolomites were not mountains but islands an ancient sea that rose through
colliding tectonic plates. The Dolomites divergent
history accounts for its unusually contrasting features, which include jagged crests and
ancient marine fossils. High above even
the Dolomites, and far in the distance, dark
dust lanes streak out from the central plane of our
Milky Way Galaxy. The stars and dust are dotted with bright
red clouds of glowing
hydrogen gas -- such as the
Lagoon Nebula just above and to the left of center.
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 4:48 am
by Ann
This is a great APOD! The "sea of clouds" on the Earth are interesting, and the portrait of the Milky Way is superb!
Ann
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 8:44 am
by heehaw
Interstellar clouds, and terrestrial clouds!
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 11:17 am
by neufer
heehaw wrote: ↑Tue Jul 24, 2018 8:44 am
Interstellar clouds, and terrestrial clouds!
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 6:41 pm
by Joe Stieber
I was curious about the position of (4) Vesta in the picture, which would also provide the actual date (and I didn't want to log into FB to see if there was more info; also, no EXIF data this time).
Vesta is the relatively bright, star-like object to the left of, and slightly lower than the open cluster, M23. Its position corresponds with a date of June 12, 2018, in the early morning hours local time. The position of Saturn, the bright object at the left edge, is also consistent with June 12.
To find Vesta, draw a line from the Lagoon Nebula (M8, the brightest object in the picture, with a reddish tinge) upwards through the Trifid nebula (M20, also bright and reddish, but not nearly as large as M8) for about 2.5 times the spacing between M8 and M20. The line will pass between Vesta on the left and M23 on the right.
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Tue Jul 24, 2018 7:06 pm
by andyg
Very neat. In a lot of situations, those lower clouds might be the best (and only?) way to reduce light pollution, especially in such highly-populated areas.
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 3:19 am
by BDanielMayfield
andyg wrote: ↑Tue Jul 24, 2018 7:06 pm
Very neat. In a lot of situations, those lower clouds might be the best (and only?) way to reduce light pollution, especially in such highly-populated areas.
Not the only way. Widespread electric grid power failures are almost totally effective at reducing light pollution.
Bruce
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 8:06 am
by Pinturicchio
From the data that appear on the profile fb of the author shows that the landscape with the clouds was taken approximately 10 months ago, in October 2017 with a 135mm, the sky probably 12 June 2018 with a 50mm, from a location that at this point I can not say it's the same.
It would be nice to know if photomontages like this are possible for the publication on APOD ....
![Shocked :shock:](./images/smilies/icon_eek.gif)
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 8:26 am
by Ann
Pinturicchio wrote: ↑Wed Jul 25, 2018 8:06 am
From the data that appear on the profile fb of the author shows that the landscape with the clouds was taken approximately 10 months ago, in October 2017 with a 135mm, the sky probably 12 June 2018 with a 50mm, from a location that at this point I can not say it's the same.
It would be nice to know if photomontages like this are possible for the publication on APOD ....
APOD Robot wrote:
This multi-exposure image was captured from Lagazuoi
So yes, it is allowed.
So why not make a multi-exposure image yourself that is as nice as this one? Maybe it could become an APOD.
Ann
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 8:59 am
by Pinturicchio
I believe that a "Multi exposure" image is a bit different from an image taken on different dates and at different focal lengths.
It does not just change the exposure, it changes angles, proportions, perspectives, orientation....
But this is a matter of scientific rigor that NASA does not require...
I'm happy to have obtained my APOD without these tricks.
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 1:47 pm
by geckzilla
Pinturicchio wrote: ↑Wed Jul 25, 2018 8:59 am
I believe that a "Multi exposure" image is a bit different from an image taken on different dates and at different focal lengths.
It does not just change the exposure, it changes angles, proportions, perspectives, orientation....
But this is a matter of scientific rigor that NASA does not require...
I'm happy to have obtained my APOD without these tricks.
Yeah, I'm not really sure this kind of "multi exposure" is kosher. Here's the mentioned original image of the Dolomites. The APOD would appear to not be an accurate representation of a real scene. I don't even know if this one is a real image.
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 3:25 pm
by MarkBour
neufer wrote: ↑Tue Jul 24, 2018 11:17 am
heehaw wrote: ↑Tue Jul 24, 2018 8:44 am
Interstellar clouds, and terrestrial clouds!
What's a Dolotite ?
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Wed Jul 25, 2018 4:33 pm
by neufer
MarkBour wrote: ↑Wed Jul 25, 2018 3:25 pm
neufer wrote: ↑Tue Jul 24, 2018 11:17 am
heehaw wrote: ↑Tue Jul 24, 2018 8:44 am
Interstellar clouds, and terrestrial clouds!
What's a Dolotite ?
https://en.wikipedia.org/wiki/Stalactite wrote:
<<A stalactite (from the Greek stalasso, (σταλάσσω), "to drip", and meaning "that which drips") is a type of formation that hangs from the ceiling of caves, hot springs, or manmade structures such as bridges and mines. Any material which is soluble, can be deposited as a colloid, or is in suspension, or is capable of being melted, may form a stalactite. Stalactites may be composed of lava, minerals, mud, peat, pitch, sand, sinter, and amberat (crystallized urine of pack rats).
A stalagmite (from the Greek σταλαγμίτης - stalagmitês, from σταλαγμίας - stalagmias, "dropping, trickling") is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings.
The Dolomites, also known as the "Pale Mountains", take their name from the carbonate rock dolomite, itself named for 18th-century French mineralogist Déodat Gratet de Dolomieu (1750–1801), who was the first to describe the mineral.
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO
3)
2. In old USGS publications, it was referred to as magnesian limestone, a term now reserved for magnesium-deficient dolostones or magnesium-rich limestones. Technically, dolostone has a stoichiometric ratio of nearly equal amounts of magnesium and calcium. Most dolostones formed as a magnesium replacement of limestone or lime mud prior to lithification. It is resistant to erosion and can either contain bedded layers or be unbedded. It is less soluble than limestone in weakly acidic groundwater, but it can still develop solution features over time.>>
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Fri Jul 27, 2018 8:32 pm
by Mistikal
So how come you can see and photograph the milky way from earth but whenever you see pictures of astronauts on the space station you can never see the milky way on those pictures? This has always puzzled me. Fantastic picture, I love it.
![Smile :)](./images/smilies/icon_smile.gif)
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Fri Jul 27, 2018 9:34 pm
by neufer
Mistikal wrote: ↑Fri Jul 27, 2018 8:32 pm
So how come you can see and photograph the milky way from earth but whenever you see pictures of astronauts on the space station you can never see the milky way on those pictures? This has always puzzled me. Fantastic picture, I love it.
Whenever you see pictures of astronauts on the space station
between Memorial Day and Labor Day you can never see the milky way because the astronauts are always wearing their summer whites such that the photographs are set to too short an exposure to also see the milky way.
https://womens-fashion.lovetoknow.com/Why_Is_It_Bad_to_Wear_White_After_Labor_Day wrote:
<<In the early 1900s, the rule about only wearing white between Memorial Day and Labor Day was started according to the vacationing schedule of the elite. Those who could afford it would leave their homes behind and spend months at the sea or in the mountains, where they had a completely different type of wardrobe, including the light, bright white pieces most associated with the summer months. When those fun-loving summer days were over, the white clothes were packed away and the people went back to their regular lives, having escaped the oppressive heat between the end of May and early September. Those white clothes that they loved during the summer months had no place in their "real life" wardrobes, so the cutoff for white clothing became Labor Day.>>
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Sun Jul 29, 2018 8:41 pm
by robertocolombari
There has been a discussion over the FB pages today about it (in Italian).
I'm not particularly touched by the fact that this image is not "real" but what would have been great is the author explaining that he copied and pasted (if he did so, as I understood) the milky way from another image he did, probably not even in the Dolomites.
Again, it is not required. It is a gentle agreement among us, imagers.
As far as I understood from Facebook today, this image has nothing to do with multi-exposure techniques, for instance some longer exposures for the Milky Way and shorter for the terrestrial landscape and then a merge in PS.
It seems that these are 2 separated sessions, probably not even done in the same place, and merged together with some unknown criteria (if I am wrong on this point, I'd be glad to be corrected).
Cheers.
RC
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Sun Jul 29, 2018 9:34 pm
by Bubu93
robertocolombari wrote: ↑Sun Jul 29, 2018 8:41 pm
There has been a discussion over the FB pages today about it (in Italian).
I'm not particularly touched by the fact that this image is not "real" but what would have been great is the author explaining that he copied and pasted (if he did so, as I understood) the milky way from another image he did, probably not even in the Dolomites.
As far as I understood from Facebook today, this image has nothing to do with multi-exposure techniques, for instance some longer exposures for the Milky Way and shorter for the terrestrial landscape and then a merge in PS.
It seems that these are 2 separated sessions, probably not even done in the same place, and merged together with some unknown criteria (if I am wrong on this point, I'd be glad to be corrected).
This is the image used for the milky way shot, completely unrelated to the Dolomites image (and pheraps also to the sea one?).
https://www.facebook.com/angeloperronep ... =3&theater
I've also seen what happened on those italian pages, after he got criticized for the manipulation apparently the author threatened to sue the owner of the page which caught him and now the page got taken down (not sure if by the owned for caution or because of legal measures), that's a pretty disgusting behaviour if you ask me...
![Confused :?](./images/smilies/icon_confused.gif)
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Sun Jul 29, 2018 9:51 pm
by robertocolombari
Lol I read it
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Mon Aug 06, 2018 2:56 pm
by micheleciro
Is there a way to let APOD know the scandal going on in Italy with this photo? It's not good for this website, nor for Italian astrophotographers...
Re: APOD: Clouds of Earth and Sky (2018 Jul 24)
Posted: Mon Aug 06, 2018 3:12 pm
by geckzilla
micheleciro wrote: ↑Mon Aug 06, 2018 2:56 pm
Is there a way to let APOD know the scandal going on in Italy with this photo? It's not good for this website, nor for Italian astrophotographers...
You can
email the editors if you want. I'm not sure how many people have already informed them about it, though. Oddly enough, this isn't the first scandal to come out of Italy.