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* The Milky Way's satellite system consists of Sagittarius Dwarf Galaxy, Large Magellanic Cloud, Small Magellanic Cloud, Canis Major Dwarf, Ursa Minor Dwarf, Draco Dwarf, Carina Dwarf, Sextans Dwarf, Sculptor Dwarf, Fornax Dwarf, Leo I, Leo II, and Ursa Major I Dwarf and Ursa Major II Dwarf.
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Milky and Way's
It vividly stands out when conditions are otherwise so dark that the Milky Way's central region casts shadows on the ground.
According to Mohani Mohamed, the Arabian astronomer Alhazen ( 965 – 1037 ) made the first attempt at observing and measuring the Milky Way's parallax, and he thus " determined that because the Milky Way had no parallax, it was very remote from the Earth and did not belong to the atmosphere.
However, Slipher discovered that the spiral nebulae had high red shifts, indicating that they were moving away at rate higher than the Milky Way's escape velocity.
At the outer reaches of the system, however, the Sun's gravity is weaker and the gradient of the Milky Way's gravitational field plays a far more noticeable role.
* The galaxy RXJ1242-11, observed to have a supermassive black hole core similar to the Milky Way's, is about 200 megaparsecs ( 650 million light-years ) away from the Earth.
Furthermore, because of the LMC's high galactic latitude, an observer there would get an oblique view of the entire galaxy, free from the interference of interstellar dust which makes studying in the Milky Way's plane difficult from Earth.
* 11th century — Ibn al-Haytham ( Alhazen ), an Arabian astronomer, refutes Aristotle's theory on the Milky Way by making the first attempt at observing and measuring the Milky Way's parallax,
* 7 E + 41 m² – roughly the area of Milky Way's galactic disk
At a distance of about 200, 000 light-years, it is one of the Milky Way's nearest neighbors.
Particularly crowded regions of the sky ( namely, the Virgo Cluster and the Milky Way's galactic center ) can prove to be challenging to an observer as well, and a Messier marathon will generally budget time for these regions accordingly.
It had to be at a high galactic latitude, because dust and obscuring matter in the plane of the Milky Way's disc prevents observations of distant galaxies at low galactic latitudes.
The gravitational sphere of influence of M5, ( i. e. the volume of space in which stars are gravitationally bound to it rather than being torn away by the Milky Way's gravitational pull ) has a radius of some 200 light-years.
The bar may be surrounded by a ring called the " 5-kpc ring " that contains a large fraction of the molecular hydrogen present in the galaxy, as well as most of the Milky Way's star formation activity.
* A simulation of the stars orbiting the Milky Way's central massive black hole
It was referred to as an energy barrier that was the result of a hard radiation wave front from a megastar exploding in a globular cluster just beyond the Milky Way's leading edge.
The models of both its orbit and the Milky Way's potential field could be improved by proper-motion observations of Sag DEG's stellar debris.
Usually members of the Milky Way's halo, they frequently have high space velocities relative to the Sun.
In 1959 the IAU defined the position of the Milky Way's north galactic pole as exactly RA =, Dec = in the then-used B1950 epoch ; in the currently-used J2000 epoch, after precession is taken into account, its position is RA, Dec.
* The Inhibitors, having done severe damage to the galaxy during the Dawn War, attempt to redeem themselves by shepherding life through the Milky Way's collision with Andromeda.
At first he thought his analysis placed an upper limit on the Milky Way's diameter of about 10, 000 parsecs with the Sun located somewhat near the center although he later revised this.
In 1947, research had been started at the Lick Observatory in California to study the Northern Milky Way's structure by determining the accurate positions and apparent motions of stars.
This number is not well-estimated, because the Milky Way's mass is not well estimated.
Milky and satellite
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.
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
| satellite of Milky Way
The Large Magellanic Cloud ( LMC ) is a nearby irregular galaxy, and a satellite of the Milky Way.
Location of the Large Magellanic Cloud with respect to the Milky Way and other satellite galaxies
* 1. 7 Zm — 179, 000 light years — Distance to the Large Magellanic Cloud, largest satellite galaxy of the Milky Way
* 8. 5 Zm — 900, 000 light years — Distance to the Leo I Dwarf Galaxy, farthest known Milky Way satellite galaxy
The Large Magellanic Cloud, a satellite galaxy of the Milky Way at about 50 kpc () from the Sun, contains a giant H II region called the Tarantula Nebula.
AB7 is one of the highest excitation nebulae in the Magellanic Clouds, two satellite galaxies of our own Milky Way
The Sagittarius Dwarf Elliptical Galaxy ( Sag DEG ) is an elliptical loop-shaped satellite galaxy of the Milky Way Galaxy.
* July 21 – R. Ibata, M. Irwin, and G. Gilmore discover the Sagittarius Dwarf Elliptical Galaxy, a satellite galaxy of the Milky Way, considered the closest galaxy to the Milky Way until 2003.
** Sculptor Dwarf Galaxy, a dwarf spheroidal galaxy and satellite galaxy of the Milky Way, not part of the Sculptor Group.
S Doradus is one of the brightest stars in the Large Magellanic Cloud, a satellite of the Milky Way.
For comparison, there were observed to be around 38 dwarf galaxies in the Local Group, and only around 11 orbiting the Milky Way, ( for a detailed and more up to date list see Milky Way's satellite galaxies ) yet one dark matter simulation predicted around 500 Milky Way dwarf satellites.
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