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As shown in this Hubble image of a small outer part of the Andromeda galaxy, we can see background galaxies across the Andromeda halo. Thousands of such galaxies have been discovered, many of which are at various stages of mergers and acts of galactic cannibalism.NASA, ESA and T.M. Brown (STScI)
A look at the night sky, near and far, reveals galaxies everywhere we look.
The Hubble Advanced Camera for Investigations has identified a number of ultra-distant galaxy clusters. If black energy is a cosmological constant, all these groups will remain gravitationally bound, like all groups and clusters of galaxies, but they will move away from us and each other with time, while the Dark energy continues to dominate the expansion of the Universe.NASA, ESA, J. Blakeslee, M. Postman and G. Miley / STScI
It is estimated that there are about two billion galaxies throughout the observable universe.
Our local group of galaxies is dominated by Andromeda and the Milky Way, but our cosmic wood collar contains many dwarf galaxies clustered around each of the larger members. Triangulum is the 3rd largest. The large Magellan cloud is the fourth largest galaxy in the local group, with many more, including M32, between 0.1% and 0.6% of the mass of the Milky Way. About 72 galaxies exist in our local group altogether.Andrew Z. Colvin
Our local group, dominated by Andromeda and the Milky Way, is home to about 70 galaxies in total.
Different images of a simulation of the fusion of the Milky Way and Andromeda galaxies. When a major fusion of this type occurs, it may be that a large amount of debris is ejected, creating satellite galaxies dominated by normal matter. The merger will complete in about 7 billion years and the other local group galaxies will join a variety of calendars.NASA, ESA, Z. Levay, R. van der Marel, T. Hallas and A. Mellinger
On cosmic time scales, gravity will bring us all together into a single and huge elliptical galaxy.
The figure shows the current flow of galaxies – the flow in the cosmic super-highway and on the bridge to the Virgin, in the region around the Milky Way, Andromeda (M31) and Centaur A, the last of which is definitely beyond Beyond the Local. Group."Plans of satellite galaxies and the cosmic Web", Noam Libeskind et al., 2015
But beyond our backyard, all other galaxies, clusters and clusters move away from us.
Our local supercluster, Laniakea, contains the Milky Way, our local group, the Virgo group and many smaller groups and groups on the periphery. However, each group and group is bound only to itself and will be separated from others because of the dark energy and our expanding Universe. After 100 billion years, even the closest galaxy to our local group will be about a billion light-years away, making them thousands and potentially millions of times weaker than the closest ones . galaxies are appearing today.Andrew Z. Colvin / Wikimedia Commons
Once you are about 4 to 5 million light years away, dark energy increases the space faster than gravity attracts other objects in the space.
The different possible destinies of the Universe, with our current destiny, accelerated, shown right. After a while, the acceleration will leave all the galactic or supergalactic structures bound completely isolated in the Universe, all other structures irrevocably accelerating. We can only look in the past to infer the presence of dark energy, but its implications are greater for the future.NASA & ESA
Over time, all other galaxies will see their distance and speed of recession increase from our point of view.
The Markarian chain with the name of the galaxies, located near the center of the Cluster of the Virgin. At its current distance of 60 million light-years away from us at about 0.4% of the speed of light. After a few tens of billions of years, humanity will never be able to access it, even if we went there at the speed of light.Wikimedia Commons / Bilbo-le-hobbit and Packbj
The Virgo cluster, with thousands of galaxies, is the last big cluster that will remain visible.
The galaxy of the sculptor is about a galaxy of the size of the Milky Way that rapidly forms stars and is surrounded by a small number of satellite galaxies. Beyond that, a looser stream of galaxies, aligned with a filamentous line, may or may not be linked to it.ESO / J. Emerson / VISTA. Acknowledgments: Cambridge Astronomical Unit
Other smaller groups are more numerous and closer, but recede with the expansion of the Universe.
Located just outside the Big Dipper, the M81 and M82 objects appear nebulous, but are actually galaxies located far from the Milky Way, containing billions of stars each. The smallest galaxy, M82, moves temporarily towards us, but this is only due to the gravitational influence of the group as a whole. Over time, the M81 group will accelerate globally.Markus Schopfer / c.c.-by-2.5
This includes closely related groups, such as Sculptor and M81.
The Centaurus galaxy A contains a dusty disc, but it is dominated by an elliptical shape and a halo of satellites: evidence of a highly evolved galaxy that has seen many mergers in its past. It's the closest active galaxy to us, but it speeds up far from our local group.Christian Wolf and the SkyMapper / Australian National University Team
It also includes groups with two largely independent major members, such as the Centaurus A group or the IC 342 / Maffei group.
The promising works of the Italian astronomer Paolo Maffei on infrared astronomy have resulted in the discovery of galaxies – as Maffei 1 and 2, shown here – in the plane of the Milky Way itself. It may be that there are still closer galaxies on the border between us bound and unrelated, located in the plane of the Milky Way, until then unknown.WISE mission; NASA / JPL-Caltech / UCLA
Still others, like the M94, may only include free and unbound galaxies.
The Messier 94 galaxy is large, radical and beautiful, and is a dominant member of a weakly linked group named for it. One wonders if individual members are linked or will dissociate over time and that the Universe will expand further.R Jay Gabany (Blackbird Obs.)
The closest ones are NGC 55 and NGC 300.
This irregular galaxy, NGC 55, is as small as the big Magellan cloud, but is only 7 million light-years away, making it one of the closest galaxies of the local group and the place between us and the group of sculptors.Observatory of ESO in La Silla
As the Universe expands, they will all disappear.
The brightest and closest galaxy, confirmed as being beyond the local group, is NGC 300, just 6 million light-years away. In about 100 billion years, it will definitely be over: the last galaxy accessible beyond what remains of our local group.ESO / Large Field Imager (WFI)
Mostly Mute Monday tells the astronomical history of an object or phenomenon in images, images and no more than 200 words. Speak less; mouse more.
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As shown in this Hubble image of a small outer part of the Andromeda galaxy, we can see background galaxies across the Andromeda halo. Thousands of such galaxies have been discovered, many of which are at various stages of mergers and acts of galactic cannibalism.NASA, ESA and T.M. Brown (STScI)
A look at the night sky, near and far, reveals galaxies everywhere we look.
The Hubble Advanced Camera for Investigations has identified a number of ultra-distant galaxy clusters. If black energy is a cosmological constant, all these groups will remain gravitationally bound, like all groups and clusters of galaxies, but they will move away from us and each other with time, while the Dark energy continues to dominate the expansion of the Universe.NASA, ESA, J. Blakeslee, M. Postman and G. Miley / STScI
It is estimated that there are about two billion galaxies throughout the observable universe.
Our local group of galaxies is dominated by Andromeda and the Milky Way, but our cosmic wood collar contains many dwarf galaxies clustered around each of the larger members. Triangulum is the 3rd largest. The large Magellan cloud is the fourth largest galaxy in the local group, with many more, including M32, between 0.1% and 0.6% of the mass of the Milky Way. About 72 galaxies exist in our local group altogether.Andrew Z. Colvin
Our local group, dominated by Andromeda and the Milky Way, is home to about 70 galaxies in total.
Different images of a simulation of the fusion of the Milky Way and Andromeda galaxies. When a major fusion of this type occurs, it may be that a large amount of debris is ejected, creating satellite galaxies dominated by normal matter. The merger will complete in about 7 billion years and the other local group galaxies will join a variety of calendars.NASA, ESA, Z. Levay, R. van der Marel, T. Hallas and A. Mellinger
On cosmic time scales, gravity will bring us all together into a single and huge elliptical galaxy.
The figure shows the current flow of galaxies – the flow in the cosmic super-highway and on the bridge to the Virgin, in the region around the Milky Way, Andromeda (M31) and Centaur A, the last of which is definitely beyond Beyond the Local. Group."Plans of satellite galaxies and the cosmic Web", Noam Libeskind et al., 2015
But beyond our backyard, all other galaxies, clusters and clusters move away from us.
Our local supercluster, Laniakea, contains the Milky Way, our local group, the Virgo group and many smaller groups and groups on the periphery. However, each group and group is bound only to itself and will be separated from others because of the dark energy and our expanding Universe. After 100 billion years, even the closest galaxy to our local group will be about a billion light-years away, making them thousands and potentially millions of times weaker than the closest ones . galaxies are appearing today.Andrew Z. Colvin / Wikimedia Commons
Once you are about 4 to 5 million light years away, dark energy increases the space faster than gravity attracts other objects in the space.
The different possible destinies of the Universe, with our current destiny, accelerated, shown right. After a while, the acceleration will leave all the galactic or supergalactic structures bound completely isolated in the Universe, all other structures irrevocably accelerating. We can only look in the past to infer the presence of dark energy, but its implications are greater for the future.NASA & ESA
Over time, all other galaxies will see their distance and speed of recession increase from our point of view.
The Markarian chain with the name of the galaxies, located near the center of the Cluster of the Virgin. At its current distance of 60 million light-years away from us at about 0.4% of the speed of light. After a few tens of billions of years, humanity will never be able to access it, even if we went there at the speed of light.Wikimedia Commons / Bilbo-le-hobbit and Packbj
The Virgo cluster, with thousands of galaxies, is the last big cluster that will remain visible.
The galaxy of the sculptor is about a galaxy of the size of the Milky Way that rapidly forms stars and is surrounded by a small number of satellite galaxies. Beyond that, a looser stream of galaxies, aligned with a filamentous line, may or may not be linked to it.ESO / J. Emerson / VISTA. Acknowledgments: Cambridge Astronomical Unit
Other smaller groups are more numerous and closer, but recede with the expansion of the Universe.
Located just outside the Big Dipper, the M81 and M82 objects appear nebulous, but are actually galaxies located far from the Milky Way, containing billions of stars each. The smallest galaxy, M82, is moving temporarily towards us, but this is only due to the gravitational influence of the group as a whole. Over time, the M81 group will accelerate globally.Markus Schopfer / c.c.-by-2.5
This includes closely related groups, such as Sculptor and M81.
The Centaurus galaxy A contains a dusty disc, but it is dominated by an elliptical shape and a halo of satellites: evidence of a highly evolved galaxy that has seen many mergers in its past. It's the closest active galaxy to us, but it speeds up far from our local group.Christian Wolf and the SkyMapper / Australian National University Team
It also includes groups with two largely independent major members, such as the Centaurus A group or the IC 342 / Maffei group.
The promising works of the Italian astronomer Paolo Maffei on infrared astronomy have resulted in the discovery of galaxies – as Maffei 1 and 2, shown here – in the plane of the Milky Way itself. It may be that there are still closer galaxies on the border between us bound and unrelated, located in the plane of the Milky Way, until then unknown.WISE mission; NASA / JPL-Caltech / UCLA
Still others, like the M94, may only include free and unbound galaxies.
The Messier 94 galaxy is large, radical and beautiful, and is a dominant member of a weakly linked group named for it. One wonders if individual members are linked or will dissociate over time and that the Universe will expand further.R Jay Gabany (Blackbird Obs.)
The closest ones are NGC 55 and NGC 300.
This irregular galaxy, NGC 55, is as small as the big Magellan cloud, but is only 7 million light-years away, making it one of the closest galaxies of the local group and the place between us and the group of sculptors.Observatory of ESO in La Silla
As the Universe expands, they will all disappear.
The brightest and closest galaxy, confirmed as being beyond the local group, is NGC 300, just 6 million light-years away. In about 100 billion years, it will definitely be over: the last galaxy accessible beyond what remains of our local group.ESO / Large Field Imager (WFI)
Mostly Mute Monday tells the astronomical history of an object or phenomenon in images, images and no more than 200 words. Speak less; mouse more.
