M45 Pleiades LRGB

M45 Pleiades LRGB

The Pleiades, also known as the Seven Sisters and Messier 45, are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and luminous stars that have formed within the last 100 million years. Reflection nebulae around the brightest stars were once thought to be left over material from the formation of the cluster, but are now considered likely to be an unrelated dust cloud in the interstellar medium through which the stars are currently passing.

Computer simulations have shown that the Pleiades were probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.
(c) Wikipedia

Own remote observatory. AZ-EQ6 mount, ED80 (520mm at 1/6.5), Atik383L+. Guilde – OAG with QHY5 camera.
Baader L: 104 x 600s;
Baader R: 30 x 300s;
Baader G: 30 x 300s;
Baader B: 55 x 300s;
Total exposure – 27 hr.
Captured in SGP, processed in Pixinsight.

Posted by sergiy.vakulenko on 2019-11-09 21:14:20

Tagged: , Astronomy , Astrophotography , Astrophoto , Deepsky , DSO , Space , Sky , Stars , Nebula , M45 , Pleiades , LRGB , ED80 , Atik383L+

The Core of Barred Spiral Galaxy NGC 1365

The Core of Barred Spiral Galaxy NGC 1365

The barred spiral galaxy NGC 1365 in Fornax is feeding material into its central region, igniting massive star birth and probably causing its bulge of stars to grow. The material also is fueling a black hole in the galaxy’s core. A galaxy’s bulge is a central, football-shaped structure composed of stars, gas, and dust.

A barred spiral galaxy is characterized by a lane of stars, gas, and dust slashing across a galaxy’s central region. It has a small bulge that is dominated by a disk of material. The spiral arms begin at both ends of the bar. The bar is funneling material into the hub, which triggers star formation and feeds the bulge. This Hubble image reveals only the core of the galaxy within its elongated bulge. The galaxy’s two large and prominent spiral arms are well outside the field of view.

For more information, visit: hubblesite.org/news_release/news/1999-34

Credit: Allan Sandage (The Observatories of the Carnegie Institution of Washington) and John Bedke (Computer Sciences Corporation and the Space Telescope Science Institute), John Trauger (Jet Propulsion Laboratory), NASA, ESA, Rainier Peleti, and C. Marcella Carollo (Johns Hopkins University and Columbia University)

Posted by NASA Hubble on 2018-05-18 18:14:17

Tagged: , NGC 1365 , Hubble , NASA , space , cosmos , astronomy , galaxy , barred spiral galaxy , Hubble Space Telescope , black hole

Backyard Milkyway

Backyard Milkyway

After a day of heavy rain, some hail, and then sunshine, the sky cleared enough to let the milky way shine

©Terry L Richmond

Posted by Terry L Richmond on 2018-09-28 05:13:43

Tagged: , sky , nature , smoke , astronomy , galaxy , landscape , night , space , outdoor , moon , grass , no person , atmosphere , field , hill , exploration , astronomical object , air , outer space , calamity , tree , riding , darkness , green , explosion , star , flying , outdoors , universe , track , sun , milky way , man , dust , water , spacecraft , hillside , science , mountain , meteorological phenomenon , large , dawn , midnight , train , travel , computer wallpaper , eruption , grassy , snow , standing

[Concept Art] Dust Storm over Endeavour Crater on Mars

[Concept Art] Dust Storm over Endeavour Crater on Mars

Rendered using Autodesk Maya and Adobe Lightroom. HiRISE data processed using gdal.

NASA/JPL/University of Arizona/USGS
Source: www.uahirise.org/dtm/dtm.php?ID=ESP_018701_1775

Posted by Kevin M. Gill on 2018-06-13 23:21:51

Tagged: , Mars , Endeavour , Endeavour Crater , HiRISE , Mars Exploration Rovers , Opportunity , Computer Graphics , CGI , Planetary , Science , Astronomy , Space

Whirlpool Galaxy (M51)

Whirlpool Galaxy (M51)

The Whirlpool Galaxy (also known as Messier 51a, M51a, and NGC 5194). This is the first astro-image created in over a month. During the downtime I have been giving the computer a much-needed overhaul. It was getting slower and slower and crashing with alarming regularity so I re-installed the operating system and upgraded much of the software. That meant there were bound to be some teething problems getting everything up and running again. For this reason we chose a fairly easy target but an old favourite nevertheless. What we call the Whirlpool Galaxy (or M51) is actually a pair of interacting galaxies; M51a, the larger of the pair, is a grand-design spiral galaxy, and its companion, M51b or NGC 5195, is a dwarf galaxy interacting with it. Both galaxies are approximately 25 million light-years away from Earth and are located in the constellation Canes Venatici. M51 can be found just next to the star Alkaid, the most eastern (or leftmost) star in the Big Dipper (or Plough) asterism. The two galaxies are connected by a dust-rich tidal bridge. The dust in this tidal bridge can be seen silhouetted against the center of NGC 5195. This demonstrates that NGC 5195 appears to lie behind the Whirlpool Galaxy. The encounter has significantly enhanced the spiral structure of M51. I measured the diameter of M51a to be approximately 46,000 light years and the diameter of M51b to be 12,560 light years. The distance between the cores of the two galaxies is approximately 28,400 light years. All measurements are approximations made from converting pixels to arcseconds and using the small angle formula.

More information here:

028 x 300 second exposures at Unity Gain (139) cooled to -20°C
030 x dark frames
050 x flat frames
100 x bias frames (subtracted from flat frames)
Binning 1×1
Total integration time = 2 hours and 20 minutes

Captured with APT
Guided with PHD2
Processed in Nebulosity and Photoshop

Telescope: Sky-Watcher Explorer-150PDS
Mount: Skywatcher EQ5
Guide Scope: Orion 50mm Mini
Guiding Camera: ZWO ASI120MC
Imaging Camera: ZWO ASI1600MC Pro
Baader Mark-III MPCC Coma Corrector
Light pollution filter

Posted by Davide Simonetti on 2020-04-21 04:26:30

Tagged: , Whirlpool Galaxy , Spiral Galaxies , Galaxies , Messier 51a , Messier 51b , Messier 51 , M51a , M51b , M51 , NGC 5194 , NGC 5195 , Space , Astrophotography , Astronomy

Exoplanet Apparently Disappears in Latest Hubble Observations

Exoplanet Apparently Disappears in Latest Hubble Observations

Now you see it, now you don’t.

What astronomers thought was a planet beyond our solar system has now seemingly vanished from sight. Though this happens in science fiction, such as Superman’s home planet Krypton exploding, astronomers are looking for a plausible explanation.

One interpretation is that, rather than being a full-sized planetary object, which was first photographed in 2004, it could instead be a vast, expanding cloud of dust produced in a collision between two large bodies orbiting the bright nearby star Fomalhaut. Potential follow-up observations might confirm this extraordinary conclusion.

"These collisions are exceedingly rare and so this is a big deal that we actually get to see one," said András Gáspár of the University of Arizona, Tucson. "We believe that we were at the right place at the right time to have witnessed such an unlikely event with NASA’s Hubble Space Telescope."

"The Fomalhaut system is the ultimate test lab for all of our ideas about how exoplanets and star systems evolve," added George Rieke of the University of Arizona’s Steward Observatory. "We do have evidence of such collisions in other systems, but none of this magnitude has been observed in our solar system. This is a blueprint of how planets destroy each other."

The object, called Fomalhaut b, was first announced in 2008, based on data taken in 2004 and 2006. It was clearly visible in several years of Hubble observations that revealed it was a moving dot. Until then, evidence for exoplanets had mostly been inferred through indirect detection methods, such as subtle back-and-forth stellar wobbles and shadows from planets passing in front of their stars.

Unlike other directly imaged exoplanets, however, nagging puzzles arose with Fomalhaut b early on. The object was unusually bright in visible light, but did not have any detectable infrared heat signaturewhen observed by NASA’s Spitzer Space Telescope. Astronomers conjectured that the added brightness came from a huge shell or ring of dust encircling the planet that may possibly have been collision-related. The orbit of Fomalhaut b also appeared unusual, possibly very eccentric.

"Our study, which analyzed all available archival Hubble data on Fomalhaut revealed several characteristics that together paint a picture that the planet-sized object may never have existed in the first place," said Gáspár.

The team emphasizes that the final nail in the coffin came when their data analysis of Hubble images taken in 2014 showed the object had vanished, to their disbelief. Adding to the mystery, earlier images showed the object to continuously fade over time, they say. "Clearly, Fomalhaut b was doing things a bona fide planet should not be doing," said Gáspár.

The interpretation is that Fomalhaut b is slowly expanding from the smashup that blasted a dissipating dust cloud into space. Taking into account all available data, Gáspár and Rieke think the collision occurred not too long prior to the first observations taken in 2004. By now the debris cloud, consisting of dust particles around 1 micron (1/50th the diameter of a human hair), is below Hubble’s detection limit. The dust cloud is estimated to have expanded by now to a size larger than the orbit of Earth around our Sun.

Equally confounding is that the team reports that the object is more likely on an escape path, rather than on an elliptical orbit, as expected for planets. This is based on the researchers adding later observations to the trajectory plots from earlier data. "A recently created massive dust cloud, experiencing considerable radiative forces from the central star Fomalhaut, would be placed on such a trajectory," said Gáspár. "Our model is naturally able to explain all independent observable parameters of the system: its expansion rate, its fading and its trajectory."

Because Fomalhaut b is presently inside a vast ring of icy debris encircling the star, colliding bodies would likely be a mixture of ice and dust, like the comets that exist in the Kuiper belt on the outer fringe of our solar system. Gáspár and Rieke estimate that each of these comet-like bodies measured about 125 miles (200 kilometers) across (roughly half the size of the asteroid Vesta).

According to the authors, their model explains all the observed characteristics of Fomalhaut b. Sophisticated dust dynamical modeling done on a cluster of computers at the University of Arizona shows that such a model is able to fit quantitatively all the observations. According to the author’s calculations, the Fomalhaut system, located about 25 light-years from Earth, may experience one of these events only every 200,000 years.

Gáspár and Rieke — along with other members of an extended team — will also be observing the Fomalhaut system with NASA’s upcoming James Webb Space Telescope in its first year of science operations. The team will be directly imaging the inner warm regions of the system, spatially resolving for the first time the elusive asteroid-belt component of an extrasolar planetary system. The team will also search for bona fide planets orbiting Fomalhaut that might be gravitationally sculpting the outer disk. They will also analyze the chemical composition of the disk.

Their paper, "New HST [Hubble] data and modeling reveal a massive planetesimal collision around Fomalhaut" is being published on April 20, 2020, in the Proceedings of the National Academy of Sciences.

The Hubble Space Telescope is a project of international cooperation between NASA and ESA (European Space Agency). NASA’s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, Maryland, conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy in Washington, D.C.

For more information: www.nasa.gov/feature/goddard/2020/exoplanet-apparently-di…

Credits: NASA, ESA, and A. Gáspár and G. Rieke (University of Arizona)

Posted by NASA Hubble on 2020-07-31 15:35:11

Tagged: , NASA , Hubble Space Telescope , Hubble , exoplanet , Astronomy , Universe , Space , Science

NGC 5256 and Their Last Dance

NGC 5256 and Their Last Dance

[NGC 5256]

NGC 5256 is a galaxy that has two disc galaxies, that are colliding into each other.
It was discovered by William Herschel and it is located in the constellation Ursa Major. NGC 5256 is located about 350 million lightyears away from the Earth.

Here is a brief explanation of what is happening here; Two disc galaxies started to interact with each other gravitationally for billions of years. That gravitational interaction caused a collision between two galaxies. When they finally collided both galaxies started to release enormous amounts of energy and ionized gas to the vastness of space. You can see the remaining dust and gas from the ongoing last phase of collision. Also red surrounding ionized gas is mostly made out of SII

Technical Details;

Image color:
-Composed 5 channels to create a color balance. 3 different stacked and cleared data sets were used.

Cameras used:
-Hubble Space Telescope-WFC3 (Wide Field Camera 3)
-Hubble Space Telescope-ACS (Advanced Camera for Surveys)

-435nm (Optical Blue)
-673nm (Optical SII)
-814nm (Infrared)

Processing Softwares:
-Siril (I used this software to combine 3 different monochrome images that were taken with 3 different filter and 2 different camera. I also used this software for color calibration)

-GIMP (I used this software to clear artifacts and other stuff on the image using healing tool. I also did some levels adjustments)

-Topaz Studio 2 (I used this software which can clear and denoise the image using artificial intelligence)

-Adobe PS (I used this software to align and rescale the monochrome images since they were taken with different cameras they weren’t aligning)

-Adobe Lightroom CC (I used this software to add sharpness, texture and clarity I also denoised the image a little bit to make it softer)

-ESA/ESO/NASA FITS Liberator(I used this software to stretch the RAW data sets that I got from Hubble Legacy Archive [HLA])

-NASA, ESA, Hubble, HLA
-Hüseyin Avcu (@hsyns_astro & @juggernatphysics [on Instagram])

Posted by hsyn.avcu5 on 2020-08-10 13:11:38

Tagged: , Astrophotography , Astronomy , Computer , Processing , Telescope , Space , Hubble

M45- The Pleiades Cluster

M45- The Pleiades Cluster

The Pleiades, also known as M45, the Seven Sisters or Subaru (Japan), is an open star cluster containing middle-aged stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.

[Info from Wikipedia]

Nikon D5100
Explore Scientific ED80
Celestron AVX Mount
23 x 120 second exposures @ ISO 1600

Shot from the L&A Dark Sky Viewing Area in Erinsville, Ontario

Posted by Dark Arts Astrophotography on 2016-10-08 20:38:55

Tagged: , astrophotography , astronomy , space , Pleiades , Subaru , Cluster , m45 , Kingston , kingstonist , Ontario , Astrometrydotnet:id=nova1769464 , Astrometrydotnet:status=solved

The Mice

The Mice

This colliding pair of spiral galaxies is known as "The Mice" because of the long tails of stars and gas emanating from each galaxy. Otherwise known as NGC 4676, they will eventually merge into a single giant galaxy.

In the galaxy at left, the bright blue patch can be identified as a cascade of clusters and associations of young, hot blue stars, whose formation has been triggered by the tidal forces of the gravitational interaction. Streams of material can also be seen flowing between the two galaxies in this Hubble Space Telescope image.

The clumps of young stars in the long, straight tidal tail (upper right) are separated by fainter regions of material. These dim regions suggest that the clumps of stars have formed from the gravitational collapse of the gas and dust that once occupied those areas. Some of the clumps have luminous masses comparable to dwarf galaxies that orbit in the halo of our own Milky Way.

For more information, visit: hubblesite.org/image/1183/news_release/2002-11

For a computer simulation of The Mice colliding, visit: hubblesite.org/video/285/news_release/2002-11

Credit: NASA, H. Ford (JHU), G. Illingworth (UCSC/LO), M. Clampin (STScI), G. Hartig (STScI), the ACS Science Team, and ESA

Posted by NASA Hubble on 2019-04-09 20:57:37

Tagged: , NGC 4676 , Interacting galaxies , colliding galaxies , galaxy collision , galaxy , galaxies , space , astronomy , NASA , Hubble , Hubble Space Telescope , cosmos

Interacting Galaxy NGC 4485

Interacting Galaxy NGC 4485

Galaxy NGC 4485 is irregular in shape, but it hasn’t always been so. Part of NGC 4485 has been dragged toward a second galaxy, named NGC 4490 — which lies out of frame to the bottom right of this image. Between them, these two galaxies make up a galaxy pair called Arp 269. Their interactions have warped them both, turning them from spiral galaxies into irregular ones.

NGC 4485 is the smaller galaxy in this pair, which provides a real-world example for astronomers to compare to their computer models of galactic collisions. The most intense interaction between these two galaxies is all but over; they have made their closest approach and are now separating. The trail of bright stars and knotty, orange clumps that we see here extending out from NGC 4485 is all that connects them — a trail that spans some 24,000 light-years.

Astronomers believe that many of the stars in this connecting trail could never have existed without the galaxies’ close encounter. When galaxies interact, hydrogen gas is shared between them, triggering intense bursts of star formation. The orange knots of light in this image are examples of such regions, clouded with gas and dust.

A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Kathy van Pelt.

For more information, visit: www.spacetelescope.org/images/potw1419a/

Credit: ESA/Hubble & NASA; Acknowledgment: Kathy van Pelt

Posted by NASA Hubble on 2019-04-11 05:57:45

Tagged: , NGC 4485 , NGC 4490 , Arp 269 , Interacting galaxies , colliding galaxies , galaxy collision , galaxy , galaxies , space , astronomy , NASA , Hubble , Hubble Space Telescope , cosmos , ESA , Hidden Treasures