Found Images: 2019 April

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bystander
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HEIC: Comet or Cluster? (Messier 62)

Post by bystander » Mon Apr 15, 2019 3:28 pm

Comet or Cluster?
ESA Hubble Picture of the Week | 2019 Apr 15
Most globular clusters are almost perfectly spherical collections of stars — but Messier 62 breaks the mould. The 12-billion-year-old cluster is distorted, and stretches out on one side to form a comet-like shape with a bright head and extended tail. As one of the closest globular clusters to the centre of our galaxy, Messier 62 is likely affected by strong tidal forces that displace many of its stars, resulting in this unusual shape.

When globular clusters form, they tend to be somewhat denser towards the centre. The more massive the cluster, the denser the centre is likely to be. With a mass with almost a million times that of the Sun, Messier 62 is one of the densest of them all. With so many stars at the centre, interactions and mergers occur regularly. Huge stars form and run out of fuel quickly, exploding violently and their remains collapse to form white dwarfs, neutron stars and even black holes!

For many years, it was believed that any black holes that form in a globular cluster would quickly be kicked out due to the violent interactions taking place there. However, in 2013, a black hole was discovered in Messier 62 — the first ever to be found in a Milky Way globular cluster, giving astronomers a whole new hunting ground for these mysterious objects.

This view comprises ultraviolet and visible light gathered by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys.
Know the quiet place within your heart and touch the rainbow of possibility; be
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Re: Found Images: 2019 April

Post by starsurfer » Tue Apr 16, 2019 7:48 am

NGC 6822
http://astrophotography.aa6g.org/Astrop ... sx814.html
Copyright: Chuck Vaughn
ngc6822.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Tue Apr 16, 2019 7:50 am

vdB38
http://www.astrosurf.com/ilizaso/orriak ... Q_U16m.htm
Copyright: Iñaki Lizaso
vdb38.jpg
This area is near the emission nebula Sh2-264.
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Re: Found Images: 2019 April

Post by starsurfer » Wed Apr 17, 2019 9:46 am

HDW 6
https://pbase.com/skybox/image/169065340
Copyright: Kevin Quin
169065340.Dr6HCC7N.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Thu Apr 18, 2019 9:44 am

NGC 3486
https://www.flickr.com/photos/joelkuiper/37693207935
Copyright: Joel Kuiper
37693207935_713b0fd350.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Thu Apr 18, 2019 9:47 am

NGC 7331 and Stephan's Quintet
https://www.astrobin.com/232089/
Copyright: Stefan Roth
78e0f703a0b432efa061161325520ed6.1824x0.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sat Apr 20, 2019 9:04 am

Abell 36
http://www.capella-observatory.com/Imag ... bell36.htm
Copyright: Josef Pöpsel and Beate Behle
Abell36.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sun Apr 21, 2019 9:03 am

LDN 122 and LDN 146
http://www.atacama-photographic-observa ... .php?id=84
Copyright: Thierry Demange, Richard Galli and Thomas Petit
ldn122.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Mon Apr 22, 2019 7:39 am

Gamma Cygni region
https://www.cxielo.ch/gallery/v/nebulae ... x.jpg.html
Copyright: Martin Rusterholz
gcyg.jpg
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Blood Red (ALMA)

Post by bystander » Mon Apr 22, 2019 3:40 pm

Blood Red
ESO Picture of the Week | 2019 Apr 22
This ESO Picture of the Week, captured by ESO Photo Ambassador Petr Horálek, shows a bright crescent Moon hanging above the Chilean Andes, embedded in a blood-red sky that floods the frame with waves of deep crimson. Also seen here are a couple of the antennas belonging to the Atacama Large Millimeter/submillimeter Array (ALMA), a state-of-the-art observatory that studies light from some of the coldest objects in the Universe.

The silhouetted duo of antennas are seen peering upwards, eager to begin their evening of stargazing — and impatient for the eye-catching ripples of cloud to clear. At an altitude of 5000 metres in the arid Atacama Desert, clouds like these are relatively uncommon. The atmosphere in this region of northern Chile is incredibly dry and regularly leads to clear skies, offering around 300 cloudless nights per year!

ALMA has 66 individual constituent antennas, each of which can be moved very precisely around the vast Chajnantor plateau to create a variety of configurations. When working together they can produce much higher resolution observations of the cosmos than they can individually, and collectively they form the largest ground-based astronomical project in the world.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

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HEIC: Crowded Cluster (Messier 75)

Post by bystander » Mon Apr 22, 2019 3:49 pm

Crowded Cluster
ESA Hubble Picture of the Week | 2019 Apr 22
This sparkling burst of stars is Messier 75. It is a globular cluster: a spherical collection of stars bound together by gravity. Clusters like this orbit around galaxies and typically reside in their outer and less-crowded areas, gathering to form dense communities in the galactic suburbs.

Messier 75 lies in the constellation of Sagittarius (The Archer), around 67 000 light-years away from Earth. The majority of the cluster’s stars, about 400 000 intotal, are found in its core; it is one of the most densely populated clusters ever found, with a phenomenal luminosity of some 180 000 times that of the Sun. No wonder it photographs so well!

Discovered in 1780 by Pierre Méchain, Messier 75 was also observed by Charles Messier and added to his catalogue later that year. This image of Messier 75 was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS).
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

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Re: Found Images: 2019 April

Post by starsurfer » Tue Apr 23, 2019 9:29 am

NGC 1261
http://www.astro-austral.cl/imagenes/st ... 1/info.htm
Copyright: José Joaquin Pérez
ngc1261.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Wed Apr 24, 2019 8:01 am

DG 66
http://bf-astro.com/dg66/dg66.htm
Copyright: Bob Franke
dg66.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Thu Apr 25, 2019 8:45 am

NGC 3532
https://www.astrobin.com/340934/
Copyright: Ben Klerk
d0qQxNPASmQh_1824x0_iV2k0-15.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Thu Apr 25, 2019 8:47 am

NGC 5927
https://www.astrobin.com/251047/
Copyright: Fabian Rodriguez Frustaglia
9e01d85d11c9ab4a1c7fc6972a7eb2b6.1824x0.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sat Apr 27, 2019 8:27 am

Pre 59 and Pre 61
http://members.pcug.org.au/~stevec/Wray ... 0_RC14.htm
Copyright: Steve Crouch
Pre59.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sun Apr 28, 2019 8:54 am

Albireo
http://www.capella-observatory.com/Imag ... lbireo.htm
Copyright: Stefan Binnewies and Josef Pöpsel
Albireo.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sun Apr 28, 2019 8:56 am

Sh2-54
https://astrodonimaging.com/gallery/egg-in-the-nest/
Copyright: Don Goldman
SH2_54.jpg
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Re: Found Images: 2019 April

Post by starsurfer » Sun Apr 28, 2019 9:00 am

Hen 2-145
http://www.chart32.de/index.php/component/k2/item/306
Copyright: CHART32
Processing: Johannes Schedler
Hen2-145.jpg
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Re: Found Images: 2019 April

Post by Ann » Sun Apr 28, 2019 9:57 am

IC 1613, Dwarf Galaxy
https://www.hansonastronomy.com/ic-1613
Copyright: Mark Hanson

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Re: Found Images: 2019 April

Post by Ann » Sun Apr 28, 2019 10:31 am

NGC 4214, Dwarf Galaxy
https://www.hansonastronomy.com/ngc-4214
Copyright: Mark Hanson

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Re: Found Images: 2019 April

Post by Ann » Sun Apr 28, 2019 10:57 am

NGC 1097
https://www.hansonastronomy.com/ngc-1097
Photo: Mark Hanson, S. Mazlin, W. Keller, R. Parker, T. Tse, P. Proulx, D. Plesko; SSRO/PROMPT/CTIO

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Re: Found Images: 2019 April

Post by Ann » Sun Apr 28, 2019 11:01 am

NGC 1398
https://www.hansonastronomy.com/ngc-1398
Photo: Mark Hanson, S. Mazlin, W. Keller, R. Parker, T. Tse, P. Proulx, D. Plesko; SSRO/PROMPT/CTIO

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Re: Found Images: 2019 April

Post by Ann » Sun Apr 28, 2019 12:04 pm

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ESO: Starbursts and Slow Burns (Messier 100)

Post by bystander » Mon Apr 29, 2019 4:53 pm

Starbursts and Slow Burns
ESO Picture of the Week | 2019 Apr 29
This is one of 74 nearby galaxies whose stellar nurseries were recently observed by the Atacama Large Millimeter/submillimeter Array, or ALMA, in an astronomical census called Physics at High Angular resolution in Nearby GalaxieS (PHANGS). So far, around 100 000 of these stellar nurseries have been imaged in over 750 hours of observation. ALMA’s remarkable sensitivity provides data at high enough resolution to study these regions in detail, and shows that some are bursting with new stars, while others evolve more gradually.

This anticipated diversity in the process of how stars form was the motivation behind this enormous effort. There have long been theories that aimed to explain how and why these differences might occur, some involving the characteristics of the home galaxy itself — properties such as size, age, and internal dynamics — but our lack of high-resolution data had been an obstacle to testing them.

The vast quantity and variety of data yielded by PHANGS are already helping astronomers to understand more, even though the census is only a third complete. The project aims to observe a total of about 300 000 stellar nurseries and by the end it should significantly advance our understanding of how a galaxy’s properties influence the way in which it forms new stars.
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor