#Milky_Way_Galaxy

[phonemantra-blog]

Research shows that some Milky Way star clusters did not form within the galaxy, but appear to have been "stolen" from other galaxies According to recent research in astronomy, most large galaxies arose from the merger of small galaxies. This means that some star clusters currently in the Milky Way may have been inherited from absorbed galaxies, or even "stolen" from neighboring galaxies such as the Magellanic Clouds. The first connections between these clusters and different host galaxies were discovered in the 1990s, but recent research has become increasingly informative, allowing the percentage of clusters stolen and which clusters were "stolen" to be determined. The Milky Way is adjacent to a large number of galaxies. This includes the famous Magellanic Clouds, as well as lesser-known ones such as the Fornax Dwarf Galaxy and the Antlia 2 Dwarf Galaxy. The discovery of streams of ruptured clusters driven by tidal forces has offered a possible explanation for why many star clusters in the Milky Way are similar in age while others are relatively young. Astronomers have suggested that these young clusters formed inside dwarf galaxies. [caption id="attachment_68895" align="aligncenter" width="768"] Milky Way[/caption] Over time, more and more evidence has been collected to support this argument. In 2002, the cluster NGC 5634 was discovered to be in a stream emanating from a dwarf galaxy in the constellation Sagittarius. Its motion and poor metal content also pointed to an origin in a dwarf galaxy. Since then, astronomers have found compelling evidence that several other star clusters are associated with this stream-torn galaxy. Among them: AM 4, Arp 2, Pal 12, NGC 2419, NGC 4147, Terzan 7, Terzan 8, Whiting 1. Meanwhile, other streams of broken dwarf galaxies have been discovered, including the Helm Stream, the Gaia-Enceladus Stream, and the Sequoia Galaxy. More associations with additional star clusters followed. In addition to the galaxies currently undergoing engulfment, astronomers have also suggested that some more intact dwarf galaxies orbiting the Milky Way could have contributed. how did star clusters from other galaxies end up in the Milky Way? In a recent series of papers, astronomers from the Iran University of Science and Technology have studied how various neighboring galaxies of the Milky Way can exchange clusters. In their first work, they built models of dwarf galaxies with star clusters in different orbits around the Milky Way to study how easily their clusters could separate from their host galaxy. They found that the percentage of such clusters varied from 12% to 93%. Clusters were most often "stolen" if they had elliptical orbits that reached the outskirts of their parent galaxies. However, more massive galaxies were better able to hold together their clusters. Based on this range, the paper suggested that at least two clusters could have been stolen from the Fornax galaxy, four from the Large Magellanic Clouds, two from the Small Magellanic Clouds, and fourteen from the Sagittarius dwarf galaxy. In the second paper, the researchers took a different approach and studied the orbital characteristics of 154 globular star clusters and compared them with the characteristics of 41 dwarf galaxies around the Milky Way and other tidally disrupted systems. They identified 14 clusters associated with the Sagittarius dwarf galaxy. However, their results disagree with other studies regarding exactly what kind of clusters these are. Five clusters previously associated with the Sagittarius dwarf galaxy, according to the authors, did not have sufficiently similar parameters to be considered “stolen.” However, they identified four new globular clusters not previously associated with the galaxy as having a high probability of originating in another galaxy, and six others with a lower probability. The study also found six clusters that likely formed in the Large Magellanic Cloud. As a result, their review notes that 29 of the known star clusters have properties similar enough to the dwarf galaxies considered to trace their connection. The authors acknowledge that their models are somewhat oversimplified because they do not fully account for the three-dimensional structure of dwarf galaxies. Thus, they leave it open for future research, which will include further study of the newly identified star clusters. These studies provide more evidence that the Milky Way's star clusters are not its population. They are a combination of clusters from other galaxies and clusters formed within satellite galaxies.

[yocsquizzl-blog]

#The_Milky_Way_Galaxy rotates at about 560,000 miles per hour and completes a full revolution once every 200 million years. Astronomers have estimated that there are more than 100 billion galaxies in the universe. It is said that in about 4 billion years, the #Milky_Way_galaxy will merge with the #Andromeda_galaxy to form “Milkomedia”. Learn facts about #galaxies and stellar objects by subscribing to #SquizzlWorld. For more information visit https://www.squizzlworld.com/ #galaxy #childmagazineindia #KidsMagazines #ChildrenMagazines #BestMagazines #KidsStories #KidsComics #bestmagazinesforkids #onlinemagazinesforkids https://www.instagram.com/p/BxjZFcnhrVw/?igshid=1nn24ofj3yvki

[itsdanystormborn]

Hey,can you send me your background pic?I loooove it and I want it as my desktop background^^And keep the good work,love your page

Hello! The pink milky way? sure! :) and thank you!

https://www.10wallpaper.com/es/view/milky_way_galaxy-Universe_HD_Wallpaper.html

[nativemakers]

via Amateur Astrophotography

[apod]

2017 June 14

M89: Elliptical Galaxy with Outer Shells and Plumes Image Credit & Copyright: Mark Hanson

Explanation: Can you see them? This famous Messier object M89, a seemingly simple elliptical galaxy, is surrounded by faint shells and plumes. The cause of the shells is currently unknown, but possibly tidal tails related to debris left over from absorbing numerous small galaxies in the past billion years. Alternatively the shells may be like ripples in a pond, where a recent collision with another large galaxy created density waves that ripple through this galactic giant. Regardless of the actual cause, the featured image highlights the increasing consensus that at least some elliptical galaxies have formed in the recent past, and that the outer halos of most large galaxies are not really smooth but have complexities induced by frequent interactions with -- and accretions of -- smaller nearby galaxies. The halo of our own Milky Way Galaxy is one example of such unexpected complexity. M89 is a member of the nearby Virgo cluster of galaxies which lies about 50 million light years distant.

∞ Source: apod.nasa.gov/apod/ap170614.html

[wigmund]

From Astronomy Picture of the Day; February 6, 2018:

Galaxy NGC 474: Shells and Star Streams CFHT, Coelum, MegaCam, J.-C. Cuillandre (CFHT) & G. A. Anselmi (Coelum)

What's happening to galaxy NGC 474? The multiple layers of emission appear strangely complex and unexpected given the relatively featureless appearance of the elliptical galaxy in less deep images. The cause of the shells is currently unknown, but possibly tidal tails related to debris left over from absorbing numerous small galaxies in the past billion years. Alternatively the shells may be like ripples in a pond, where the ongoing collision with the spiral galaxy just above NGC 474 is causing density waves to ripple through the galactic giant. Regardless of the actual cause, the featured image dramatically highlights the increasing consensus that at least some elliptical galaxies have formed in the recent past, and that the outer halos of most large galaxies are not really smooth but have complexities induced by frequent interactions with -- and accretions of -- smaller nearby galaxies. The halo of our own Milky Way Galaxy is one example of such unexpected complexity. NGC 474 spans about 250,000 light years and lies about 100 million light years distant toward the constellation of the Fish (Pisces).

[phonemantra-blog]

Galactic archeology reveals the dramatic history of Andromeda. The formation of the galaxy was more intense than that of the Milky Way, with several periods of intense star formation caused by galactic collisions A study led by scientists from the University of Hertfordshire has revealed the dramatic history of Andromeda, our closest neighboring galaxy. An international team of astrophysicists has determined details of the galaxy's history through galactic archaeology, an approach that studies the chemical composition of stars and the development of their host galaxy to reconstruct its past. Scientists examined the elemental composition of Andromeda, and the gas and dust content of planetary nebulae formed from the discarded outer layers of dying low-mass stars. [caption id="attachment_68817" align="aligncenter" width="780"] Milky Way[/caption] The analysis showed that the formation of Andromeda was more dramatic and powerful than the formation of our Galaxy. After the intense burst of star formation at the time of the galaxy's creation between 2 and 4.5 billion years ago, another burst occurred, most likely caused by the so-called "wet merger" - the merger of two gas-rich galaxies that provokes intense star formation. Andromeda's history turns out to be more dramatic than that of the Milky Way Scientists, based on the position and movement of individual stars within the galaxy, have long assumed that Andromeda was formed by the merger of two galaxies. Professor Kobayashi's research sheds light on the nature and consequences of such a merger using the chemical composition of stars and explains how stars and elements formed throughout Andromeda's history. [caption id="attachment_68818" align="aligncenter" width="780"] Milky Way[/caption] Professor of Astrophysics Kobayashi, from the Center for Astrophysics Research at the University of Hertfordshire, said: “This is a fantastic example of how galactic archeology can provide new insights into the history of the universe. By analyzing the chemical enrichment of different generations of stars in Andromeda, we can bring its history to life and better understand its origins." Professor Kobayashi's theoretical model predicts two different compositions of stars in the two components of Andromeda's disk. One composition contains ten times more oxygen than iron, and the other contains approximately equal amounts of oxygen and iron. These simulations are supported by spectroscopic observations of planetary nebulae and observations of red giants by the James Webb Space Telescope (JWST). The new study continues Professor Kobayashi's work on the origin of elements in the Universe. As he explains: “Oxygen is one of the so-called alpha elements created by massive stars. Other alpha elements include neon, magnesium, silicon, sulfur, argon, and calcium. Oxygen and argon have been measured using observations of planetary nebulae, but Andromeda is so distant that measuring other elements, including iron, will require JWST." In the coming years, JWST and large ground-based telescopes will continue to observe Andromeda, confirming new results.

[nativemakers]

via Amateur Astrophotography

[tadcraigphotography]

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A post shared by Maui Wedding Photographer Extraordinaire (@tadcraigphotography)

Last night hanging out with all these stars, hunting for meteors on the summit of Haleakala!😎👍🏿. _____________________________________ #hawaii #haleakala #milkyway #maui #mauilove #mauinokaoi #mauiscenic #mauidestinationphotographer #amazing_longexpo #longexposure #longexpo_kings #milky_way_galaxy #nikon #perseidmeteors #meteors (at Haleakala National Park)

[tadcraigphotography]

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A post shared by Maui Wedding Photographer Extraordinaire (@tadcraigphotography)

Was up near the summit of Haleakala for sunset and got to witness the evening turn into night. Quite spectacular thing to witness. Maui No Ka Oi! ___________________________________ #maui #mauilove #mauiscenic #longexposure #longexpo_kings #amazing_longexpo #haleakala #mauinokaoi #milky_way_galaxy #stars (at Haleakala National Park)