Page 1 of 2
Found Images: 2018 August
Posted: Thu Aug 02, 2018 1:58 pm
by bystander
Have you seen a great image or video somewhere that you think would make a great APOD? Nominate it for APOD! Please post as much information here as you have about the image/video with a link to any source(s) for it you know of here, and the editors will take a look.
When posting the image itself, please do not post anything larger than a thumbnail here; please honor the copyright holder's copyright.
Please keep hotlinked images under 400K.
Thank you!
<< Previously
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 4:45 am
by starsurfer
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 4:49 am
by starsurfer
Abell 1185
http://www.caelumobservatory.com/gallery/n3561.shtml
Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 4:57 am
by starsurfer
Rho Ophiuchi Nebula (IC 4604)
http://www.cielaustral.com/galerie/photo78.htm
Copyright: Ciel Austral
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 5:01 am
by starsurfer
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 5:07 am
by starsurfer
Re: Found Images: 2018 August
Posted: Fri Aug 03, 2018 5:08 am
by starsurfer
Cat's Paw Nebula (NGC 6334)
http://www.pbase.com/tango33/image/160473871
Copyright: Kfir Simon
Re: Found Images: 2018 August
Posted: Sun Aug 05, 2018 2:23 pm
by Ann
NGC 3433
https://www.flickr.com/photos/geckzilla/11079031636
I just stumbled on a truly beautiful picture of a spiral galaxy photographed by Hubble and processed by Geck. Unfortunately I can't post the picture, because it is too large, but do follow the link and read Geck's comment on the image!
Ann
ESO Under the Southern Cross
Posted: Mon Aug 06, 2018 2:11 pm
by bystander
Under the Southern Cross
ESO Picture of the Week | 2018 Aug 06
This photo from the
Ultra High Definition Expedition to ESO’s
La Silla Observatory in Chile shows the
Danish 1.54-metre telescope admiring the starry southern skies. The Southern Cross — one of the most distinctive asterisms — can be seen to the left of the telescope’s open dome, nestled in the plane of the
Milky Way.
The constellation of
Crux (
The Cross) is best known for this cross-shaped asterism, which comprises four stars —
Alpha,
Beta,
Gamma and
Delta Crucis. The closest of these stars, Gamma Crucis, sits just 88 light-years from Earth, while the furthest is 364 light-years away. The blue–white star Alpha Crucis, the bottom point of the Cross, is the 13th brightest star in the entire night sky.
The dark, inky smudge just above the Southern Cross is the
Coalsack Nebula, one of the most prominent
dark nebulae visible to the naked eye. This opaque cloud of interstellar dust obscures the light emitted by more distant stars, creating a seemingly starless void in the midst of the Milky Way. The fiery red
emission nebula IC 2948 and distinctive
Carina Nebula can be seen below the Cross as two patches of nebulosity.
The Southern Cross has great significance in the Southern Hemisphere. For centuries, it — like the
Big Dipper in northern skies — served as a beacon for navigators because the longer bar of the Cross points almost exactly towards the south pole of the sky. The Cross has also played an important role in the spiritual beliefs of many southern cultures and it is also the logo of the European Southern Observatory.
HEIC: A Globular Cluster’s Striking Red Eye (NGC 2108)
Posted: Mon Aug 06, 2018 2:23 pm
by bystander
A Globular Cluster’s Striking Red Eye
ESA Hubble Picture of the Week | 2018 Aug 06
This Picture of the Week shows the colourful
globular cluster NGC 2108. The cluster is nestled within the
Large Magellanic Cloud, in the constellation of the
Swordfish (
Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor
John Herschel, son of the famous
William Herschel.
The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a
carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C
2, CH, CN, C
3 and SiC
2, which scatter blue light within the star, allowing red light to pass through undisturbed.
This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (
ACS), using three different filters.
Re: HEIC: A Globular Cluster’s Striking Red Eye (NGC 2108)
Posted: Mon Aug 06, 2018 6:02 pm
by Ann
bystander wrote: ↑Mon Aug 06, 2018 2:23 pm
A Globular Cluster’s Striking Red Eye
ESA Hubble Picture of the Week | 2018 Aug 06
This Picture of the Week shows the colourful
globular cluster NGC 2108. The cluster is nestled within the
Large Magellanic Cloud, in the constellation of the
Swordfish (
Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor
John Herschel, son of the famous
William Herschel.
The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a
carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C
2, CH, CN, C
3 and SiC
2, which scatter blue light within the star, allowing red light to pass through undisturbed.
This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (
ACS), using three different filters.
Fascinating. Are we sure that the red carbon star is a member of the globular?
Ann
Re: HEIC: A Globular Cluster’s Striking Red Eye (NGC 2108)
Posted: Tue Aug 07, 2018 2:42 pm
by starsurfer
Ann wrote: ↑Mon Aug 06, 2018 6:02 pm
bystander wrote: ↑Mon Aug 06, 2018 2:23 pm
A Globular Cluster’s Striking Red Eye
ESA Hubble Picture of the Week | 2018 Aug 06
This Picture of the Week shows the colourful
globular cluster NGC 2108. The cluster is nestled within the
Large Magellanic Cloud, in the constellation of the
Swordfish (
Dorado). It was discovered in 1835 by the astronomer, mathematician, chemist and inventor
John Herschel, son of the famous
William Herschel.
The most striking feature of this globular cluster is the gleaming ruby-red spot at the centre left of the image. What looks like the cluster’s watchful eye is actually a
carbon star. Carbon stars are almost always cool red giants, with atmospheres containing more carbon than oxygen — the opposite to our Sun. Carbon monoxide forms in the outer layer of the star through a combination of these elements, until there is no more oxygen available. Carbon atoms are then free to form a variety of other carbon compounds, such as C
2, CH, CN, C
3 and SiC
2, which scatter blue light within the star, allowing red light to pass through undisturbed.
This image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (
ACS), using three different filters.
Fascinating. Are we sure that the red carbon star is a member of the globular?
Ann
Well I guess they can compare the radial velocities of the star and the cluster and they probably match. This is near the much nicer NGC 2100.
Re: Found Images: 2018 August
Posted: Tue Aug 07, 2018 2:45 pm
by starsurfer
Cave Nebula (Sh2-155)
https://www.astrobin.com/320008/0/
Copyright: Tero Turunen
Re: Found Images: 2018 August
Posted: Wed Aug 08, 2018 10:47 am
by starsurfer
Ear Nebula (IPHASX J205013.7+465518)
http://www.pbase.com/dsantiago/image/167803856
Copyright: Derek Santiago
Re: Found Images: 2018 August
Posted: Wed Aug 08, 2018 10:50 am
by starsurfer
Re: Found Images: 2018 August
Posted: Wed Aug 08, 2018 10:53 am
by starsurfer
Cocoon Nebula (IC 5146)
https://www.astrobin.com/147114/
Copyright: Olly Penrice
Re: Found Images: 2018 August
Posted: Wed Aug 08, 2018 5:08 pm
by Ann
NGC 6935 and NGC 6937
Copyright: Michael Sidinio
NGC 6935 (bottom right) is an unusual galaxy which is, nevertheless, very similar to nearby galaxy
M94. Both M94 and NGC 6935 are unbarred galaxies sporting a bright blue ring of star formation separating a yellow center from a yellow disk.
Original 857K image of NGC 6935 and NGC 6937:
http://www.pbase.com/strongmanmike2002/ ... 4/original
Ann
ESO: A Fulldome Family Portrait (VLT)
Posted: Mon Aug 13, 2018 4:01 pm
by bystander
A Fulldome Family Portrait
ESO Picture of the Week | VLT | 2018 Aug 13
This fulldome view of the Very Large Telescope (
VLT), at ESO’s Paranal Observatory, shows almost all of the telescope’s constituent units in one family photograph!
ESO's VLT comprises four large 8.2-metre Unit Telescopes (
UTs), all of which can be seen here and are recognised by their boxy appearance, and four 1.8-metre Auxiliary Telescopes (
ATs), two of which are seen here flanking their bigger relatives (both with their rounded domes open). Alongside their standard designations — UT1, UT2, and so on — each of the four giant UTs has its own
name in the local Chilean Mapuche language: Antu (The Sun), Kueyen (The Moon), Melipal (The Southern Cross), and Yepun (Venus).
The yellow laser streaking up into the night sky, launched by one of the UTs, creates an artificial star high in the atmosphere, fittingly known as a Laser Guide Star (
LGS). This ‘star’ is part of the telescope’s
adaptive optics system, which allows astronomers to compensate for the effects of atmospheric turbulence and achieve far clearer images.
The image was created by
ESO Photo Ambassador Petr Horálek, and is a puzzle made up of numerous different pictures stitched together to form this high resolution
panorama.
HEIC: Galactic Treasure Chest
Posted: Mon Aug 13, 2018 4:13 pm
by bystander
Galactic Treasure Chest
ESA Hubble Picture of the Week | 2018 Aug 13
Galaxies abound in this spectacular Hubble image;
spiral arms swirl in all colours and orientations, and fuzzy
ellipticals can be seen speckled across the frame as softly glowing smudges on the sky. Each visible speck of a galaxy is home to countless stars. A few stars closer to home shine brightly in the foreground, while a massive
galaxy cluster nestles at the very centre of the image; an immense collection of maybe thousands of galaxies, all held together by the relentless force of
gravity.
Galaxy clusters are some of the most interesting objects in the cosmos. They are the nodes of the
cosmic web that permeates the entire Universe — to study them is to study the organisation of matter on the grandest of scales. Not only are galaxy clusters ideal subjects for the study of
dark matter and
dark energy, but they also allow the study of farther-flung galaxies. Their immense gravitational influence means they distort the
spacetime around them, causing them to act like giant zoom
lenses. The light of background galaxies is warped and magnified as it passes through the galaxy cluster, allowing astronomers insight into the distant — and therefore early —
Universe.
This image was taken by Hubble’s Advanced Camera for Surveys (
ACS) and Wide-Field Camera 3 (
WFC3) as part of an observing programme called
RELICS (Reionization Lensing Cluster Survey). RELICS imaged 41 massive galaxy clusters with the aim of finding the brightest distant galaxies for the forthcoming NASA/ESA/CSA James Webb Space Telescope (
JWST) to study.
ESO: Under the Celestial Arch
Posted: Mon Aug 20, 2018 2:51 pm
by bystander
Under the Celestial Arch
ESO Picture of the Week | 2018 Aug 20
In this spectacular image, taken by
ESO Photo Ambassador Petr Horálek, we see the bright arc of the
Milky Way stretching across the sky above ESO’s
La Silla Observatory in Chile. On the ground are the dome of ESO’s
3.6-metre optical telescope (on the right) and the silvery dish of the
Swedish-ESO submillimetre telescope (on the left). Even though it was decommissioned in 2003 to make way for the more advanced
APEX and
ALMA instruments, the Swedish-ESO dish still seems to be gazing longingly at the sky, perhaps hoping for another chance to explore the mysteries of the heavens.
The Milky Way dominates this image, showing clearly why La Silla is one of the best astronomical sites in the world, famed for its dark skies and clear air. From the peak of the bright arc hangs a striking red feature known as
Gum Nebula. This, like similar regions along the band of the Milky Way, is an
emission nebula, where gas is made to glow by radiation emitted from nearby bright stars. The bright band of the Milky Way is broken up by dark filaments of
dust, wherein stars are forming, stars that will add to the spectacle in the millennia to come.
Sitting under the arc is one of the Milky Way’s companion
dwarf galaxies, the
Large Magellanic Cloud; below it, just to the right of the Swedish-ESO dish, is the second such companion, known unsurprisingly as the
Small Magellanic Cloud. Over to the right of the image is the planet Jupiter, glowing brightly against the faint glow of the
gegenschein, a phenomenon only seen in the darkest skies. A rare sight for most, this magical celestial display is commonplace at astronomical observing sites like La Silla.
HEIC: Painting a Picture of the Evolving Universe
Posted: Mon Aug 20, 2018 3:05 pm
by bystander
Hubble Contributes to Painting a Picture of the Evolving Universe
ESA Hubble Picture of the Week | 2018 Aug 20
The Hubble Deep Field (
HDF) from 1995 allowed astronomers a first glimpse into the early Universe. This first picture was followed later by an even deeper observation, the Hubble Ultra Deep Field (
HUDF) in 2004. Both images were observed in visible light, the same form of light human eyes can see. But astronomers are also interested in the many forms of invisible light out in the Universe. Therefore, the Ultra Deep Field was later observed in the
infrared and the
ultraviolet as well, allowing scientists to learn even more about the Universe and to look back even further into its history.
It is less known that the famous deep field observations were not the only images the NASA/ESA Hubble Space Telescope took of the distant Universe. Hubble is also an essential part of the
GOODS (The Great Observatories Origins Deep Survey) programme, which unites extremely deep observations from several space telescopes: NASA’s
Spitzer and
Chandra; ESA's
Herschel and
XMM-Newton; and Hubble.
Together these observatories observe two patches of the sky, the
GOODS North and the
GOODS South fields, with the aim of studying it in as many different wavelengths as possible. The new image here shows part of the GOODS North Field; it includes new Hubble data at ultraviolet wavelengths in addition to the existing data. Because Earth’s atmosphere filters out most ultraviolet light, these observations can only be accomplished from space.
The observation programme, called the Hubble Deep UV (
HDUV) Legacy Survey, harnessed the ultraviolet vision of Hubble’s Wide Field Camera 3 (
WFC3). This study extends and builds on the previous Hubble multi-wavelength data in the
CANDELS-Deep (Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey) fields within the central part of the
GOODS (The Great Observatories Origins Deep Survey) fields. This mosaic is 14 times the area of the Hubble Ultraviolet Ultra Deep Field (
UVUDF) released in 2014.
viewtopic.php?t=38610
Re: Found Images: 2018 August
Posted: Sat Aug 25, 2018 1:52 pm
by starsurfer
Kronberger 45
https://www.astrobin.com/359509/B/
Copyright: Sascha Schüller
This is one of more than a hundred planetary nebulae discovered by the Deep Sky Hunters member Matthias Kronberger.
Re: Found Images: 2018 August
Posted: Sun Aug 26, 2018 1:56 pm
by Ann
NGC 4691
http://www.caelumobservatory.com/gallery/n4691.shtml
Copyright: Adam Block
Adam Block has posted a new picture of a galaxy, the remarkable barred spiral galaxy NGC 4691.
The entire spiral pattern of NGC 4691 is extremely fuzzy and devoid of any signs of youth. It looks like it is billions of years old. The bar, by contrast, is bursting with ongoing star formation. This is very unusual!
According to Principal Galaxy Catalog, the distance to NGC 4691 is about 47 million light-years, which would make it a little closer than the Virgo Cluster, and its true brightness would be 6 billion stars like the Sun, or 0.3 times the brightness of the Milky Way. But according to
this page, NGC 4691 is located some 73 million light-years away, and its true brightness would be much higher.
Ann
Re: Found Images: 2018 August
Posted: Sun Aug 26, 2018 4:45 pm
by starsurfer
Ann wrote: ↑Sun Aug 26, 2018 1:56 pm
NGC 4691
http://www.caelumobservatory.com/gallery/n4691.shtml
Copyright: Adam Block
NGC 4691.png
Adam Block has posted a new picture of a galaxy, the remarkable barred spiral galaxy NGC 4691.
The entire spiral pattern of NGC 4691 is extremely fuzzy and devoid of any signs of youth. It looks like it is billions of years old. The bar, by contrast, is bursting with ongoing star formation. This is very unusual!
According to Principal Galaxy Catalog, the distance to NGC 4691 is about 47 million light-years, which would make it a little closer than the Virgo Cluster, and its true brightness would be 6 billion stars like the Sun, or 0.3 times the brightness of the Milky Way. But according to
this page, NGC 4691 is located some 73 million light-years away, and its true brightness would be much higher.
Ann
When on Earth is Adam Block going to release an image of a planetary nebula?! I've been waiting years!
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Re: Found Images: 2018 August
Posted: Sun Aug 26, 2018 4:48 pm
by starsurfer
Hickson 44
http://www.gwaquarius.de/hick44.htm
Copyright: Gerald Willems