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#astronomie

Current medias about #astronomie. Feel free to comment, like and share them

Check astrogasm_'s Instagram @rqfugate -  Background stars observed during total eclipse

I hesitate to post this in light of the incredible photos by Druckmuller, but it is nevertheless a pretty interesting shot of the eclipse and surrounding star field. This is a blend of 13 shots separated by 1 stop each. In order to bring out the slight differences between tone levels, I resorted to calibrating all of the light frames by subtracting master bias and dark frames (averaged for the same exposure time), then dividing by a master flat for the f/8, the aperture used in the 13 shots. The HDR composition was assembled in PixInsight using HDRComposition and the detail was extracted using non-linear stretch routines MaskedStrech and MultistageMedianTransform (a wavelet based routine that separates the image into layers based on spatial scale). After all that, done in a 64bit computational space, I had to make an 8 bit JPEG for IG (creating some posterization) and did adjust the highlights to enhance the stars so some of the innermost corona is slightly blown. 
There are over 20 stars detected in the original file, (the faintest being HD 87391, magnitude 9.47). The relative positions of the stars with respect to the center of the sun is a test of Einstein’s General Theory of Relativity. He predicted that the gravitational field from a massive body like the sun warps space-time and that rays of light passing near the sun would be deflected toward the sun as they pass. So the test is to measure the relative positions of the stars during a total eclipse (when you can see them) and compare their apparent positions measured six months later (when you can see them at night and the sun is no longer nearby). This was first done by the astronomer Arthur Eddington on May 29, 1919 using glass photographic plates and a telescope, and the results agreed with Einstein’s prediction. It would be hard to repeat this experiment with this and subsequent images to be made at night since the plate scale of 2.4 arc sec per pixel and low SNR are marginal to see the less than one arcsec change at these star positions. At some point I will post pictures on my website and make them available for download. 1611334085798681706_6074672770

@rqfugate - Background stars observed during total eclipse I hesitate to post this in light of the incredible photos by Druckmuller, but it is nevertheless a pretty interesting shot of the eclipse and surrounding star field. This is a blend of 13 shots separated by 1 stop each. In order to bring out the slight differences between tone levels, I resorted to calibrating all of the light frames by subtracting master bias and dark frames (averaged for the same exposure time), then dividing by a master flat for the f/8, the aperture used in the 13 shots. The HDR composition was assembled in PixInsight using HDRComposition and the detail was extracted using non-linear stretch routines MaskedStrech and MultistageMedianTransform (a wavelet based routine that separates the image into layers based on spatial scale). After all that, done in a 64bit computational space, I had to make an 8 bit JPEG for IG (creating some posterization) and did adjust the highlights to enhance the stars so some of the innermost corona is slightly blown. There are over 20 stars detected in the original file, (the faintest being HD 87391, magnitude 9.47). The relative positions of the stars with respect to the center of the sun is a test of Einstein’s General Theory of Relativity. He predicted that the gravitational field from a massive body like the sun warps space-time and that rays of light passing near the sun would be deflected toward the sun as they pass. So the test is to measure the relative positions of the stars during a total eclipse (when you can see them) and compare their apparent positions measured six months later (when you can see them at night and the sun is no longer nearby). This was first done by the astronomer Arthur Eddington on May 29, 1919 using glass photographic plates and a telescope, and the results agreed with Einstein’s prediction. It would be hard to repeat this experiment with this and subsequent images to be made at night since the plate scale of 2.4 arc sec per pixel and low SNR are marginal to see the less than one arcsec change at these star positions. At some point I will post pictures on my website and make them available for download.

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Check senjadianiid's Instagram The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths.

Image Credit: John Hopkins University / Applied Physics Lab

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#planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie #worldcaptures 1611303452229964948_4672393134

The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths. Image Credit: John Hopkins University / Applied Physics Lab _______________________________ #planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie #worldcaptures

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Check christian_sainte's Instagram La voie lactée vu du Sud de la France #voielactée #milkway #astronomie #cosmique #skynight #stars #ig_france #ig_myshot 1611235276898104198_1520914178

La voie lactée vu du Sud de la France #voielactée #milkway #astronomie #cosmique #skynight #stars #ig_france #ig_myshot

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Check commentcaspace's Instagram À regarder maintenant sur France 2 ! 
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#thomaspesquet #ISS #astronomie #espace #space #emission #tv 1611216615934897812_5457197730

À regarder maintenant sur France 2 ! . #thomaspesquet #iss #astronomie #espace #space #emission #tv

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Check farfallinissimo's Instagram Lâché de ballons depuis la Coupole de la Cité de l'espace 
Nébuleuse multicolore 
#citedelespace #toulouse #lachedeballons #coupole #astronomie #couleurs 1611127526629093583_3271968431

Lâché de ballons depuis la Coupole de la Cité de l'espace Nébuleuse multicolore #citedelespace #toulouse #lachedeballons #coupole #astronomie #couleurs

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Check yann_garth's Instagram Un parhélie observé lors de la journée du club astro de Saint-Claude. #soleil #parhélie #astronomie 1611051977970474297_207651751

Un parhélie observé lors de la journée du club astro de Saint-Claude. #soleil #parhélie #astronomie

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Check lunallena_astronomia's Instagram Feliz Domingo exploradores del Cosmos! ✨⚡️
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Les presento esta Imagen que nos muestra una conjunción de cometas ☄️ es capturada en este hermoso campo estelar desde la mañana del 17 de septiembre. El cometa C / 2017 O1 ASASSN está en la parte inferior izquierda.☄️El resplandor ⚡️verdoso visible de su cola es producido por la fluorescencia de moléculas de carbono diatómicas en la luz solar.☀️⚡️Aproximándose a su punto más cercano al sol ☀️ el cometa binocular estaba solamente cerca de 7.2 minutos ligeros de la tierra ! En el mismo campo de visión telescópica está el cometa C / 2015 ER61 PanSTARRS de cola larga, saliente, en la parte superior derecha, a casi 14 minutos luz de distancia. A muchos años luz de distancia, el fondo estrellado incluye nebulosas débiles y polvorientas de la Vía Láctea.✨El conocido cúmulo de estrellas de las Pléyades se encuentra justo en la parte superior derecha del marco.✨⚡️
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Crédito de imagen y derechos de autor: José J. Chambo (Cometografia)
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#Astronomía #Astronomy #Astronomie #Comet #Cometa #Estrellas #Stars #etoiles #Vialactea #Milkyway #voielactée #Universo #Universe #Univers #Cosmos #Espacio #Space #spaceexploration #Spaceexplorers #LunaLlena #LunaLlenastronomia 1611012470116539364_3239163413

Feliz Domingo exploradores del Cosmos! ✨⚡️ - Les presento esta Imagen que nos muestra una conjunción de cometas ☄️ es capturada en este hermoso campo estelar desde la mañana del 17 de septiembre. El cometa C / 2017 O1 ASASSN está en la parte inferior izquierda.☄️El resplandor ⚡️verdoso visible de su cola es producido por la fluorescencia de moléculas de carbono diatómicas en la luz solar.☀️⚡️Aproximándose a su punto más cercano al sol ☀️ el cometa binocular estaba solamente cerca de 7.2 minutos ligeros de la tierra ! En el mismo campo de visión telescópica está el cometa C / 2015 ER61 PanSTARRS de cola larga, saliente, en la parte superior derecha, a casi 14 minutos luz de distancia. A muchos años luz de distancia, el fondo estrellado incluye nebulosas débiles y polvorientas de la Vía Láctea.✨El conocido cúmulo de estrellas de las Pléyades se encuentra justo en la parte superior derecha del marco.✨⚡️ - Crédito de imagen y derechos de autor: José J. Chambo (Cometografia) • • • #astronomía #astronomy #Astronomie #comet #cometa #estrellas #stars #etoiles #vialactea #milkyway #voielactée #universo #universe #univers #cosmos #espacio #space #spaceexploration #spaceexplorers #lunallena #lunallenastronomia

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Check astronomiefrance's Instagram NGC 1055 est une galaxie spirale barrée vue par la tranche située à environ 55 millions d'années-lumière de la Terre dans la constellation de la Baleine. Elle a été découverte le 18 décembre 1783 par le célèbre astronome germano-britannique William Herschel.

Image : ESO 
#galaxie #spirale #barree #galaxy #NGC #Terre #constellation #Baleine #Univers #universe #universo #espace #space #cosmos #astrophysics #astrophotography #Herschel #astronome #astronomie #astronomy #astronomia #astronomiefrance 1611007352991661718_1580309556

NGC 1055 est une galaxie spirale barrée vue par la tranche située à environ 55 millions d'années-lumière de la Terre dans la constellation de la Baleine. Elle a été découverte le 18 décembre 1783 par le célèbre astronome germano-britannique William Herschel. Image : ESO #galaxie #spirale #barree #galaxy #ngc #terre #constellation #baleine #univers #universe #universo #espace #space #cosmos #astrophysics #astrophotography #herschel #astronome #astronomie #astronomy #astronomia #astronomiefrance

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Check greenpeace65's Instagram #Repost @spaceclub (@get_repost)
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The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths.

Image Credit: John Hopkins University / Applied Physics Lab

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#planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie 1610882238463630588_5522964697

#repost@spaceclub (@get_repost) ・・・ The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths. Image Credit: John Hopkins University / Applied Physics Lab _______________________________ #planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie

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Check zwyback's Instagram Natürlich hat sich auch El Nath, in der Spitze des nördlichen Horns des Stieres, in mein Teleskop verirrt 
#Astroschau#Teleskop#Astro#Astronomie#astronomy#telescope#space#ElNath#βTauri#BetaTauri#Stier#Stier♉#Taurus#constellation#Sternbild#Star#Stern#Fixstern#astrophoto#astrophotography 1610878316403711831_819347427

Natürlich hat sich auch El Nath, in der Spitze des nördlichen Horns des Stieres, in mein Teleskop verirrt #astroschau#teleskop#astro#Astronomie #astronomy#telescope#space#elnath#βtauri#betatauri#stier#stier♉#taurus#constellation#sternbild#star#stern#fixstern#astrophoto#astrophotography

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Check spaceclub's Instagram The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths.

Image Credit: John Hopkins University / Applied Physics Lab

_______________________________

#planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie #worldcaptures 1610868261926688718_4397805199

The most beautiful and detailed image of the planet Mercury. The beauty of it is, that even though it is so close to the sun, some of these craters still hold water ice deposits in their depths. Image Credit: John Hopkins University / Applied Physics Lab _______________________________ #planet #mercury #merkur #astrophotography #astronomy #telescope #science #nasa #esa #eso #cosmos #solarsystem #planetarium #planetary #space #universe #venus #earth #mars #jupiter #saturn #uranus #neptune #milkywaygalaxy #amazingview #beautifulview #astrophysics #astronomia #astronomie #worldcaptures

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Check marysolfuega's Instagram Ahoy lovelies! How was your week? Mine was quite chilled. Saw some friends, read a lot, blogged a little... Nothing too exiting ^^ Do you enjoy going to the planetarium? I actually do, though I'm not expert on stars  ××××××××××××××××××××××××××××××××××××××××××××× Ahoy ihr Lieben! In letzter Zeit bin ich ja hochmotiviert, Sachbücher zu lesen! Und da kam ich um diese #Neuerscheinung nicht drumrum. Wie mir die Reise ins All gefallen hat, könnt ihr auf meinem Blog nachlesen 

http://marys-buecherwelten.blogspot.de/2017/09/das-universum-ist-eine-scheissgegend.html

#bookstagram #instabooks #bookworm #booklover #bookaddict #reader #readinggirl #rezensionsexemplar #rezension #rezensiert #bibliophile #sciencebusters #dtv #dasuniversumisteinescheissgegend #sachbuch #astronomie #weltall #universum #naturwissenschaft #physik 1610868047051464941_1714286104

Ahoy lovelies! How was your week? Mine was quite chilled. Saw some friends, read a lot, blogged a little... Nothing too exiting ^^ Do you enjoy going to the planetarium? I actually do, though I'm not expert on stars ××××××××××××××××××××××××××××××××××××××××××××× Ahoy ihr Lieben! In letzter Zeit bin ich ja hochmotiviert, Sachbücher zu lesen! Und da kam ich um diese #neuerscheinungnicht drumrum. Wie mir die Reise ins All gefallen hat, könnt ihr auf meinem Blog nachlesen http://marys-buecherwelten.blogspot.de/2017/09/das-universum-ist-eine-scheissgegend.html #bookstagram #instabooks #bookworm #booklover #bookaddict #reader #readinggirl #rezensionsexemplar #rezension #rezensiert #bibliophile #sciencebusters #dtv #dasuniversumisteinescheissgegend #sachbuch #astronomie #weltall #universum #naturwissenschaft #physik

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Check bookishtwinreads's Instagram "If you're outside the path of totality eclipse, if there's any way you can get into the path of totality for the eclipse, do it. Take the day off. Take the kids out of school. This is a once-in-a-lifetime opportunity for most people to see a total eclipse, and it is one of the grandest sights in all of nature. It's something you'll always remember, and you'll pass stories of it onto your grandchildren." - Fred Espenak  (IZ)
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Did you see the eclipse last August 21?
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#pathoftotality #eclipse #ALS #outcast #chess #astronomie #friendship #autumn #fall #bookaddict #bookworm #booklover #bookaholic #booknerd #booklove #bookcover #bookstagrammer #bookstagram #bibliophile #bookphotography #bookhoarder #bookdragon #youngadult #yabooks #book #books #reading #bookish #twin #reads 1610864452104812818_5590381246

"If you're outside the path of totality eclipse, if there's any way you can get into the path of totality for the eclipse, do it. Take the day off. Take the kids out of school. This is a once-in-a-lifetime opportunity for most people to see a total eclipse, and it is one of the grandest sights in all of nature. It's something you'll always remember, and you'll pass stories of it onto your grandchildren." - Fred Espenak (IZ) • Did you see the eclipse last August 21? • #pathoftotality #eclipse #als #outcast #chess #astronomie #friendship #autumn #fall #bookaddict #bookworm #booklover #bookaholic #booknerd #booklove #bookcover #bookstagrammer #bookstagram #bibliophile #bookphotography #bookhoarder #bookdragon #youngadult #yabooks #book #books #reading #bookish #twin #reads

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Check tamino76's Instagram Éclipse dans une tasse de thé....
#eclipse #astronomie #soleil #the #surealisme 1610840803018305005_4148907737

Éclipse dans une tasse de thé.... #eclipse #astronomie #soleil #the #surealisme

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Check cecilerth's Instagram [S U N D A Y]
Le dimanche c'est détente! Un bon magasine, une petit #bougie au senteur de l'#automne, ici c'est Warm Cashmere  
Il faut aussi que je vous parle de mon #ananas rose gold choppé chez #maisondumonde  depuis Le temps que j'en voulais un!
Et au passage le numéro de Septembre/Octobre de Ciel et Espace est en Kiosque depuis une semaine 
#sundaymorning #sunday #associationfrancaisedastronomie #cieletespace #saturne #cassini #astronomie 
#yankeecandle #warmcashmere #autumn
#pineapple #rosegold 
#potd #picoftheday #pictureoftheday #picture #instamoment #igers #igersreims #igersfrance #instagrammers #blogger 1610823687161036575_1448633374

[S U N D A Y] Le dimanche c'est détente! Un bon magasine, une petit #bougieau senteur de l' #automne, ici c'est Warm Cashmere Il faut aussi que je vous parle de mon #ananasrose gold choppé chez #maisondumonde depuis Le temps que j'en voulais un! Et au passage le numéro de Septembre/Octobre de Ciel et Espace est en Kiosque depuis une semaine #sundaymorning #sunday #associationfrancaisedastronomie #cieletespace #saturne #cassini #astronomie #yankeecandle #warmcashmere #autumn #pineapple #rosegold #potd #picoftheday #pictureoftheday #picture #instamoment #igers #igersreims #igersfrance #instagrammers #blogger

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