M16 (NGC 6611) and the Pillars of Creation

No Comments


M16 (NGC 6611) Eagle Nebula, or Star Queen Nebula, was discovered in 1745 by the Swiss astronome Jean-Philippe de Cheseaux while in 1745 and 1746, De Chéseaux compiled a list of 21 nebulous objects, of which he had originally discovered 8 objects: IC 4665, NGC 6633, M16, M25, M35 (this one might have seen before by John Bevis in England), M71, M4, and M17. Moreover, he independently re-discovered M6, NGC 6231 and M22 (No. 17). 

De Chéseaux sent this list to his grandfather, Reaumur, in Paris, and it was read by Reaumur at a meeting of the French Academy of Sciences on August 6, 1746 and mentioned by Jean Maraldi in 1746 (Maraldi 1751), by Le Gentil in 1759 (Le Gentil 1765), but then stayed unpublished and more or less forgotten until Guillaume Bigourdan recovered and published it within a larger paper in 1884 (Bigourdan 1892).

For Cheseaux observation cfr.: http://www.messier.seds.org/xtra/similar/deches.html [18/07/2023]

M16 was independently rediscovered, and nebula IC 4703 discovered, by Charles Messier on June 3, 1764.

This nebula lies in the Sagittarius Arm of the Milky Way and became famous as the “Pillars of Creation” imaged by the Hubble Space Telescope. 

The nebula contains several active star-forming gas and dust regions, and is part of a diffuse emission nebula H II region, which is catalogued as IC 4703. 

This region of active current star formation is about 5700 light-years distant. 

According to NASA, ESA, and The Hubble Heritage Team (STScI/AURA) [ https://esahubble.org/images/heic0506b/ ] among peculiarities there’s the 90 trillion kilometers long spire of gas that can be seen coming off the nebula in the northeastern part appearing like a winged fairy-tale creature poised on a pedestal, this object is actually a billowing tower of cold gas and dust rising from a stellar nursery called the Eagle Nebula. 

The name “Pillars of Creation” explains the gas and dust disposed in pillars clouds which are in the process of creating new stars, while also being eroded by the light from nearby stars that have recently formed, and it was given after the Hubble picture taken on April 1, 1995.

Astronomers responsible for the photo were Jeff Hester and Paul Scowen from Arizona State University. 

According to DeVorkin and Smith, 2015 [Devorkin, David H.; Smith, Robert W., 2015 “The Hubble Cosmos: 25 Years of New Vistas in Space.” National Geographic Society: 67 this name is based on a phrase used by Charles Spurgeon in his 1857 sermon “The Condescension of Christ”: by calling the Hubble’s spectacular image of the Eagle Nebula the Pillars of Creation, NASA scientists were tapping a rich symbolic tradition with centuries of meaning, bringing it into the modern age. 

As much as we associate pillars with the classical temples of Greece and Rome, the concept of the pillars of creation – the very foundations that hold up the world and all that is in it – reverberates significantly in the Christian tradition. When William Jennings Bryan published The World’s Famous Orations in 1906, he included an 1857 sermon by London pastor Charles Haddon Spurgeon titled “The Condescension of Christ”. In it, Spurgeon uses the phrase to convey not only the physical world but also the force that keeps it all together, emanating from the divine: “And now wonder, ye angels,” Spurgeon says of the birth of Christ, “the Infinite has become an infant; he, upon whose shoulders the universe doth hang, hangs at his mother’s breast; He who created all things, and bears up the pillars of creation, hath now become so weak, that He must be carried by a woman!”

According to Bally et. Al., the pillars are composed of cool molecular hydrogen and dust that are being eroded by photoevaporation from the ultraviolet light of relatively close and hot stars. The leftmost pillar is about four light years in length. The finger-like protrusions at the top of the clouds are larger than the Solar System, and are made visible by the shadows of evaporating gaseous globules (EGGs), which shield the gas behind them from intense UV flux.[10] EGGs are themselves incubators of new stars.

The stars then emerge from the EGGs, which then are evaporated.

Cfr.: Bally, J.; Morse, J.; Reipurth, B. (1996). “The Birth of Stars: Herbig-Haro Jets, Accretion and Proto-Planetary Disks”. In Benvenuti, Piero; Macchetto, F.D.; Schreier, Ethan J. (eds.). Science with the Hubble Space Telescope – II. Proceedings of a workshop held in Paris, France, December 4–8, 1995. Space Telescope Science Institute. https://ui.adsabs.harvard.edu/abs/1996swhs.conf..491B/abstract [18/07/2023]

SH2-171 region in SHO Palette

No Comments
SH2-171 region in SHO Palette

Astrobin: https://www.astrobin.com/i4juxi/

Astrometry: https://nova.astrometry.net/user_images/7044397#annotated


Telescopi O Obiettivi Di Acquisizione: William Optics Redcat 51

Camere Di Acquisizione: ZWO ASI1600MM Pro

Montature: Sky-Watcher EQM-35 

Filtri: Astronomik H-alpha CCD 6nm 1.25″ · Astronomik OIII CCD 6nm 1.25″ · Astronomik SII CCD 6nm 1.25″

Accessori: ZWO ASIAIR Pro · ZWO EAF · ZWO EFW 8 x 1.25″ / 31mm

Software: Adobe Photoshop · Pleiades Astrophoto PixInsight

Telescopi o Obiettivi Di Guida: QHYCCD Mini Guide Scope

Camere Di Guida: ZWO ASI120MM Mini

SH2-157, NGC7635 region in SHO palette

No Comments
Region of SH2-157 and NGC7635 in narrowband filters, SHO palette.
From Bortle 6th degree sky in Livorno, Italy – home balcony.
William Optics Redcat 51 and ASI1600mm Pro cooled at -20 Celsius.
Mount SW EQM35 Pro, setup ground on Asiair Pro.

Astrobin: https://www.astrobin.com/kf7q9p/

Astrometry: https://nova.astrometry.net/user_images/6036245#annotated


Telescopi O Obiettivi Di AcquisizioneWilliam Optics Redcat 51

Camere Di AcquisizioneZWO ASI1600MM Pro

Montature Sky-Watcher EQM-35

Filtri Astronomik H-alpha CCD 6nm · Astronomik OIII CCD 6nm · Astronomik SII CCD 6nm

AccessoriZWO ASIair Pro · ZWO EAF · ZWO EFW 8 x 1.25″ / 31mm

Software Adobe Lightroom · Adobe Photoshop · Pleiades Astrophoto PixInsight

Telescopi o Obiettivi di Guida QHYCCD Mini Guide Scope, Camere Di Guida ZWO ASI120MM Mini

 Dettagli d’acquisizione

Date:30 Aprile 2022 ·  02 Maggio 2022Pose:

Astronomik H-alpha CCD 6nm: 99×180″ (4h 57′) (gain: 139.00) -20°C bin 1×1
Astronomik OIII CCD 6nm: 132×180″ (6h 36′) (gain: 139.00) -20°C bin 1×1
Astronomik SII CCD 6nm: 92×180″ (4h 36′) (gain: 139.00) -20°C bin 1×1

Integrazione:16h 9′

Dark:33, Flat:33, Dark dei flat:33

Giorno lunare medio:15.36 giorni

Fase lunare media:1.37%

Scala del Cielo Scuro Bortle:6.00

Dettagli astrometrici di base

Astrometry.net job: None

Risoluzione: 4544×3483

Luoghi: Home (balcony), Livorno, Livorno, Italia

Origine dei dati: Giardino


No Comments
Telescopi o obiettivi di acquisizione: William Optics RedCat 51 Petzval APO
Camere di acquisizione: ZWO ASI183MC Pro
Montature: SkyWatcher AZ-GTI  ·  Skywatcher EQ35M
Telescopi o obiettivi di guida: QHYCCD QHY Mini Guide Scope
Camere di guida: QHYCCD QHY5L-II-C
Software: Pleiades Astrophoto PinInsight  ·  Lightroom  ·  Stark Labs Phd2  ·  Photoshop  ·  Astroberry  ·  KStars Ekos/INDI, Astroberry OS
Filtri: SVBONY SII Filter 2″  ·  SVBONY H-Alpha 7nm  ·  SVBONY OIII 18nm
Accessorio: SVBONY Filter Wheel 2″

Date:22 Aprile 2021 ,  23 Aprile 2021 ,  24 Aprile 2021 ,  02 Maggio 2021 ,  08 Maggio 2021 ,  27 Maggio 2021 ,  31 Maggio 2021 ,  01 Giugno 2021 ,  03 Giugno 2021 ,  09 Giugno 2021 ,  12 Giugno 2021 ,  13 Giugno 2021 ,  14 Giugno 2021 ,  15 Giugno 2021 ,  17 Giugno 2021 ,  22 Giugno 2021 ,  26 Giugno 2021 ,  27 Giugno 2021 ,  28 Giugno 2021 ,  29 Giugno 2021 ,  01 Luglio 2021 ,  05 Luglio 2021 ,  06 Luglio 2021 ,  09 Luglio 2021 ,  12 Luglio 2021 ,  14 Luglio 2021
SVBONY H-Alpha 7nm: 56×300″ (4h 40′) (gain: 180.00) -15C bin 1×1
SVBONY H-Alpha 7nm: 245×300″ (20h 25′) (gain: 180.00) 0C bin 1×1
SVBONY OIII 18nm: 106×300″ (8h 50′) (gain: 180.00) -15C bin 1×1
SVBONY OIII 18nm: 20×300″ (1h 40′) (gain: 180.00) 0C bin 1×1
SVBONY SII Filter 2″: 106×300″ (8h 50′) (gain: 180.00) -15C bin 1×1
Integrazione: 44h 25′
Dark: ~28
Flat: ~28
Dark dei flat: ~28
Giorno lunare medio: 15.51 giorni
Fase lunare media: 46.90%
Scala del Cielo Scuro Bortle: 6.00

Astrometry.net job: 4776216
Centro AR: 20h 23′ 13″
Centro DEC: +40° 47′ 59″
Campionamento: 1,989 arcsec/pixel
Orientazione: 125,144 gradi
Raggio del campo: 1,768 gradi

Astrobin: https://www.astrobin.com/zhd4gn/


An SHO palette integration for NGC6910 field.
Subrfames recorded by William Optics Redcat 51 and ASI183MC-Pro with 2″ Svbony Ha, Sii, Oiii narrowband filters.
Drizzle data integration and postproduction by PixInSight, Photoshop and Lightroom.
Subframe list as follow:
WO51 ASI183 AZGTi NGC6910 -15C Ha G180 300s_26062021 16
WO51 ASI183 AZGTi NGC6910 Ha -15C G180 300sec_22062021 17
WO51 ASI183 NGC6910 Ha -15C G180 300sec AZGTi_01072021 23
WO51 ASI183 NGC6910 Ha G180 300sec_08052021 26
WO51Redcat ASI183 Ha NGC6910 G180 300s_03062021 26
WO51Redcat ASI183 Ha NGC6910 G180 300sec_01062021 28
WO51Redcat ASI183 Ha NGC6910 Gain180 300sec_27052021 29
WO51Redcat ASI183MC-Pro Ha NGC6910 G180 300sec_31052021 30
WO51Redcat ASI183MC-Pro Ha NGC6910 Gain180 300sec_02052021 21
WO51Redcat ASI183MC-Pro Ha NGC6910 Gain180 300sec_08052021 26
WO51Redcat ASI183MC-Pro Ha NGC6910 Gain180 300sec_22042021 7
WO51Redcat ASI183MC-Pro Ha NGC6910 Gain180 300sec_23042021 28
WO51Redcat ASI183MC-Pro Ha NGC6910 Gain180 300sec_24042021 24

WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_06072021 13
WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_09072021 15
WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_12072021 22
WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_14072021 13
WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_28062021 18
WO51 ASI183 NGC6910 Sii -15C G180 300sec AZGTi_29062021 13
WO51ASI183 NGC6910 Siii -15C G180 300sec AZGTi_12072021 12

WO51 ASI183 AZGTi NGC6910 -15C Oii G180 300sec_27062021 15
WO51 ASI183 NGC6910 Oiii -15C G180 300sec AZGTi_05072021 18
WO51Redcat ASI183 -15C Oiii NGC6910 G180 300sec_15062021 21
WO51Redcat ASI183 -15C Oiii NGC6910 G180 300sec_17062021 21
WO51Redcat ASI183 Oiii -15C NGC6910 G180 300sec_13062021 15
WO51Redcat ASI183 Oiii -15C NGC6910 G180 300sec_14062021 16
WO51Redcat ASI183MC-Pro Oiii NGC6910 G180 300sec_09062021 20

Map of NGC6910 region in BW/inverted color. Labels by PixInSight image solver and render annotation scripts.

Social Widgets powered by AB-WebLog.com.