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The Milky Way galaxy is a member of an association named the Local Group, a relatively small group of galaxies that has a diameter of approximately one megaparsec.
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Milky and Way
Finally we go into the farthest reaches of the Milky Way ; ;
It seemed almost a magnification of the Galaxy itself, of the Milky Way, blown up by some master photographer.
The information obtained by astrometric measurements provides information on the kinematics and physical origin of our Solar System and our galaxy, the Milky Way.
Astrometry is an important step in the cosmic distance ladder because it establishes parallax distance estimates for stars in the Milky Way.
They may similarly be produced in regions like the center of the Milky Way and other galaxies, where very energetic celestial events occur ( principally the interaction of relativistic jets with the interstellar medium ).
Because it occupies a part of the celestial sphere that faces away from the Milky Way, Antlia contains very few deep-sky objects.
The Milky Way, for example, has an absolute magnitude of about − 20. 5.
Antares ( α Scorpii, α Sco, Alpha Scorpii ) is a red supergiant star in the Milky Way galaxy and the sixteenth brightest star in the nighttime sky.
These names are from the love story of, Qī Xī, in which Niú Láng and his two children, β and γ Aquilae, are separated from their mother, (, ), the star Vega, by the Milky Way.
They are only permitted to meet once a year, when the Milky Way is crossed by a bridge of magpies.
Scholars have proposed that the bridge may have originally represented the Milky Way and have noted parallels between the bridge and another bridge in Norse mythology, Gjallarbrú.
He did not grasp the cosmological implications of this fact, and indeed at the time it was highly controversial whether or not these nebulae were " island universes " outside our Milky Way.
Across the top, the Milky Way disk appears distorted into an arc.
In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the core of our Milky Way galaxy contains a supermassive black hole of about 4. 3 million solar masses.
The Great Rift, a series of dark patches in the Milky Way, is more visible and striking in the southern hemisphere than in the northern.
" Members of the Inca civilization identified various dark areas or dark nebulae in the Milky Way as animals, and associated their appearance with the seasonal rains.
Due to the difficulty of using these methods, they did not realize that the nebulae were actually galaxies outside our own Milky Way, nor did they speculate about the cosmological implications.
From 1869 to 1872, he was employed as an Assistant in Harvard's astronomical observatory, doing important work on determining the brightness of stars and the shape of the Milky Way.
The Coalsack Nebula is the most prominent dark nebula in the skies, easily visible to the naked eye as a prominent dark patch in the southern Milky Way.
About seven million years old, an age that makes it one of the youngest open clusters in the Milky Way, it appears to have the shape of a letter A.
It is thought of as the anchor of Tama-rereti's waka ( the Milky Way ), while the Pointers are its rope.
Cetus lies far from the galactic plane, so that many distant galaxies are visible, unobscured by dust from the Milky Way.
NGC 1502 is also associated with Kemble's Cascade, an small chain of stars 2. 5 ° long that is parallel to the Milky Way and is pointed towards Cassiopeia.
Centaurus contains several very bright stars because of its position in the Milky Way ; in addition, its alpha and beta stars are used to find the constellation Crux.
It is the largest and brightest globular cluster in the Milky Way, at ten times the size of the next-largest cluster, it has a magnitude of 3. 7.
Milky and galaxy
This has prompted suspicion that Omega Centauri was the core of a dwarf galaxy that had been absorbed by the Milky Way.
This artist ’ s impression shows the expected distribution of dark matter in the Milky Way galaxy as a blue halo of material surrounding the galaxy.
The Drake equation is a mathematical equation used to estimate the number of detectable extraterrestrial civilizations in the Milky Way galaxy.
In a 2012 study, each star of the 100 billion or so in our Milky Way galaxy is estimated to host " on average ... at least 1. 6 planets.
In an informal discussion in 1950, the physicist Enrico Fermi questioned why, if a multitude of advanced extraterrestrial civilizations exists in the Milky Way galaxy, evidence such as spacecraft or probes is not seen.
Even if intelligent life occurs on only a minuscule percentage of planets around these stars, there might still be a great number of civilizations extant in the Milky Way galaxy alone.
Some notable observed features of galaxy structure ( including our own Milky Way ) that astronomers wish to explain with galactic formation theories include ( but are certainly not limited to ) the following:
Our own galaxy ( the Milky Way ) has a tiny satellite galaxy ( the Sagittarius Dwarf Elliptical Galaxy ) which is currently gradually being ripped up and " eaten " by the Milky Way.
This would put it far outside our Milky Way galaxy, which is about a hundred thousand light years in diameter, and indeed outside the Local Group and even the Virgo Supercluster ; however, at this distance it would still be within the Pisces-Cetus Supercluster Complex.
The word galaxy is derived from the Greek galaxias (), literally " milky ", a reference to the Milky Way galaxy.
The Milky Way galaxy appears to harbor at least one such object.
In the astronomical literature, the capitalized word ' Galaxy ' is used to refer to our galaxy, the Milky Way, to distinguish it from the billions of other galaxies.
The realization that we live in a galaxy, and that there were, in fact, many other galaxies, parallels discoveries that were made about the Milky Way and other nebulae in the night sky.
" The Persian astronomer al-Bīrūnī ( 973 – 1048 ) proposed the Milky Way galaxy to be " a collection of countless fragments of the nature of nebulous stars.
In the 14th century, the Syrian-born Ibn Qayyim proposed the Milky Way galaxy to be " a myriad of tiny stars packed together in the sphere of the fixed stars ".
Both analyses failed to take into account the absorption of light by interstellar dust present in the galactic plane, but after Robert Julius Trumpler quantified this effect in 1930 by studying open clusters, the present picture of our galaxy, the Milky Way, emerged.
Thus they were not gravitationally bound to the Milky Way, and were unlikely to be a part of the galaxy.
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