Found images: 2015 December
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Re: Found images: 2015 December
NGC 253 and NGC 288
http://www.atacama-photographic-observatory.com
Copyright: Thierry Demange, Richard Galli and Thomas Petit
http://www.atacama-photographic-observatory.com
Copyright: Thierry Demange, Richard Galli and Thomas Petit
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Re: Found images: 2015 December
Hercules Galaxy Cluster (Abell 2151)
http://www.darkskywalker.com/Photograph ... 2Fs3LZS/X3
Copyright: Jimmy Walker
http://www.darkskywalker.com/Photograph ... 2Fs3LZS/X3
Copyright: Jimmy Walker
ESO: A Planetary Nebula Divided (NGC 3699)
A Planetary Nebula Divided (NGC 3699)
ESO Picture of the Week | 2015 Dec 14
ESO Picture of the Week | 2015 Dec 14
[c][attachment=0]potw1550a[1].jpg[/attachment][/c][hr][/hr]This fetching cloud of gas was imaged by the ESO Faint Object Spectrograph and Camera (EFOSC2) at ESO's La Silla Observatory. It can be found nestled in the busy constellation of Centaurus in the skies of the southern hemisphere. The cloud of gas — named NGC 3699 — is a planetary nebula, It is distinguished by an irregular mottled appearance and a dark rift, which roughly bisects it.
These objects, despite the name, have nothing to do with planets and are created in the final stages of the evolution of stars similar in mass to the Sun. The name "planetary nebula" arises from the time of their discovery by William Herschel, when they appeared in the telescopes of the time as rounded objects similar in looks to the planets.
Towards the end of their lives, stars like the Sun exhaust the supply of hydrogen in their cores, putting a stop to nuclear reactions. This causes the star's core to contract under the force of gravity and heat up, while the cooler outer layers expand tremendously — the surface of the Sun, for example, will likely engulf the orbit of Earth when it reaches this stage in its evolution. Unusually strong stellar winds push the gaseous outer layers of the star out into space, eventually exposing the core of the star, which begins to emit ultraviolet radiation, ionising the expelled gas, causing the nebula's ethereal glow, and producing beautiful and varied sights, such as the one in this image.
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
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
HEIC: A Home for Old Stars (Terzan 1)
A Home for Old Stars (Terzan 1)
ESA Hubble Picture of the Week | 2015 Dec 14
ESA Hubble Picture of the Week | 2015 Dec 14
[c][attachment=0]potw1550a[1].jpg[/attachment][/c][hr][/hr]This image, taken with the Wide Field Planetary Camera 2 (WFPC2) on board the NASA/ESA Hubble Space Telescope, shows the globular cluster Terzan 1. Lying around 20 000 light-years from us in the constellation of Scorpius (The Scorpion), it is one of about 150 globular clusters belonging to our galaxy, the Milky Way.
Typical globular clusters are collections of around a hundred thousand stars, held together by their mutual gravitational attraction in a spherical shape a few hundred light-years across. It is thought that every galaxy has a population of globular clusters. Some, like the Milky Way, have a few hundred, while giant elliptical galaxies can have several thousand.
They contain some of the oldest stars in a galaxy, hence the reddish colours of the stars in this image — the bright blue ones are foreground stars, not part of the cluster. The ages of the stars in the globular cluster tell us that they were formed during the early stages of galaxy formation! Studying them can also help us to understand how galaxies formed.
Terzan 1, like many globular clusters, is a source of X-rays. It is likely that these X-rays come from binary star systems that contain a dense neutron star and a normal star. The neutron star drags material from the companion star, causing a burst of X-ray emission. The system then enters a quiescent phase in which the neutron star cools, giving off X-ray emission with different characteristics, before enough material from the companion builds up to trigger another outburst.
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
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
Re: Found images: 2015 December
Veil Nebula Supernova Remnant
Credit: Hubble Legacy Archive, NASA, ESA
Processing and Copyright: Joachim Dietrich
Credit: Hubble Legacy Archive, NASA, ESA
Processing and Copyright: Joachim Dietrich
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Re: Found images: 2015 December
Ring Nebula (M57)
http://www.capella-observatory.com/Imag ... 7Field.htm
Copyright: Volker Wendel, Josef Pöpsel, Bernd Koch, Stefan Binnewies and Rainer Sparenberg
http://www.capella-observatory.com/Imag ... 7Field.htm
Copyright: Volker Wendel, Josef Pöpsel, Bernd Koch, Stefan Binnewies and Rainer Sparenberg
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Re: Found images: 2015 December
Seeing this great image makes me want to say, Halo, Halo!starsurfer wrote:Ring Nebula (M57)
http://www.capella-observatory.com/Imag ... 7Field.htm
Copyright: Volker Wendel, Josef Pöpsel, Bernd Koch, Stefan Binnewies and Rainer Sparenberg
Ann
Color Commentator
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Re: Found images: 2015 December
You're so funny, for some reason I imagine you wearing a giant sombrero whilst saying that!Ann wrote:Seeing this great image makes me want to say, Halo, Halo!starsurfer wrote:Ring Nebula (M57)
http://www.capella-observatory.com/Imag ... 7Field.htm
Copyright: Volker Wendel, Josef Pöpsel, Bernd Koch, Stefan Binnewies and Rainer Sparenberg
Ann
This is one of the very few double haloes around a planetary nebula, the other major one being the one around NGC 2438.
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Re: Found images: 2015 December
Great Horsehead Nebula in Orion
Credit and Copyright: Reddit user designbydave
(Sorry about the low resolution, a higher resolution photo under 400K is simply not possible. )
Credit and Copyright: Reddit user designbydave
(Sorry about the low resolution, a higher resolution photo under 400K is simply not possible. )
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Re: Found images: 2015 December
NGC 6445 and NGC 6440
http://www.pbase.com/strongmanmike2002/image/160572740
Copyright: Michael Sidonio NGC 6445 is the planetary nebula on the right and NGC 6440 is the globular cluster on the left.
http://www.pbase.com/strongmanmike2002/image/160572740
Copyright: Michael Sidonio NGC 6445 is the planetary nebula on the right and NGC 6440 is the globular cluster on the left.
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Re: Found images: 2015 December
Helix Nebula (NGC 7293)
http://www.tvdavisastropics.com/astroim ... 0000a2.htm
Copyright: Thomas Davis
http://www.tvdavisastropics.com/astroim ... 0000a2.htm
Copyright: Thomas Davis
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Re: Found images: 2015 December
Little Dumbbell Nebula (M76)
http://www.capella-observatory.com/Imag ... Ns/M76.htm
Copyright: Stefan Heutz, Stefan Binnewies and Josef Pöpsel
http://www.capella-observatory.com/Imag ... Ns/M76.htm
Copyright: Stefan Heutz, Stefan Binnewies and Josef Pöpsel
Re: Found images: 2015 December
Lunar Reconnaissance Orbiter, Earth and Moon
Credit: NASA/GSFC/Arizona State University.
Credit: NASA/GSFC/Arizona State University.
HEIC: Infant Star’s Artistic Outburst (HH 34)
Infant Star’s Artistic Outburst (HH 34)
ESA Hubble Picture of the Week | 2015 Dec 21
ESA Hubble Picture of the Week | 2015 Dec 21
[img3="Credit: ESA/Hubble & NASA"]http://cdn.spacetelescope.org/archives/ ... w1551a.jpg[/img3][hr][/hr]The artistic outburst of an extremely young star, in the earliest phase of formation, is captured in this spectacular image from the NASA/ESA Hubble Space Telescope. The colourful wisps, found in the lower left of the image, are painted onto the sky by a young star cocooned in the partially illuminated cloud of obscuring dust seen to the upper right.
Pictured punching through the enshrouding dust is an extremely hot, blue jet of gas released by the young star. As this jet speeds through space, it collides with cooler surrounding material. The result is the colourful object to the lower left, produced as the cooler material is heated by the jet (opo9524a, potw1307a).
This wispy object is known as HH 34 and it is an example of a Herbig–Haro (HH) object. It resides approximately 1400 light-years away near the Orion Nebula, a large star formation region within the Milky Way. HH objects exist for a cosmically brief time — typically thousands of years — with changes seen in observations taken only a few years apart (heic1113).
Although the jet extends the entire length between the infant star and HH34, only a fraction of it appears visible. This part of the jet possesses an intricate structure of knots and ripples, thought to be caused by the different outbursts catching up and ramming into each other over time.
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
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
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Re: HEIC: Infant Star’s Artistic Outburst (HH 34)
That is lovely, it should hang in an art gallery! I find it amusing the desciption mentions that it is near the Orion Nebula but it is one of many Herbig Haro objects that are part of the NGC 1999 complex. A wider image by Tony Hallas can be seen here.bystander wrote:Infant Star’s Artistic Outburst (HH 34)
ESA Hubble Picture of the Week | 2015 Dec 21[img3="Credit: ESA/Hubble & NASA"]http://cdn.spacetelescope.org/archives/ ... w1551a.jpg[/img3][hr][/hr]The artistic outburst of an extremely young star, in the earliest phase of formation, is captured in this spectacular image from the NASA/ESA Hubble Space Telescope. The colourful wisps, found in the lower left of the image, are painted onto the sky by a young star cocooned in the partially illuminated cloud of obscuring dust seen to the upper right.
Pictured punching through the enshrouding dust is an extremely hot, blue jet of gas released by the young star. As this jet speeds through space, it collides with cooler surrounding material. The result is the colourful object to the lower left, produced as the cooler material is heated by the jet (opo9524a, potw1307a).
This wispy object is known as HH 34 and it is an example of a Herbig–Haro (HH) object. It resides approximately 1400 light-years away near the Orion Nebula, a large star formation region within the Milky Way. HH objects exist for a cosmically brief time — typically thousands of years — with changes seen in observations taken only a few years apart (heic1113).
Although the jet extends the entire length between the infant star and HH34, only a fraction of it appears visible. This part of the jet possesses an intricate structure of knots and ripples, thought to be caused by the different outbursts catching up and ramming into each other over time.
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Re: Found images: 2015 December
NGC 2451 and NGC 2477
http://www.glitteringlights.com/Images/ ... ZKCV9pq/X3
Copyright: Marco Lorenzi
http://www.glitteringlights.com/Images/ ... ZKCV9pq/X3
Copyright: Marco Lorenzi
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Re: Found images: 2015 December
M4
http://www.chart32.de/index.php/component/k2/item/175
Copyright: CHART32
Processing: Bernd Flach-Wilken
http://www.chart32.de/index.php/component/k2/item/175
Copyright: CHART32
Processing: Bernd Flach-Wilken