The fuel for Sagittarius A* (or Sgr A* for short) is provided by local massive young stars but because these stars are located some distance from the hungry black hole where its gravity is significantly weaker, ...
What is known about Sagittarius A*,the center of our galaxy ?
The Answer ...
Sagittarius A-Star - The Milky Way's Galactic Center
(Image NASA et al.) Our Solar System revolves around the center of the Milky Way Galaxy (the Galactic Center). A large Black Hole lies at this center.
Sagittarius A*
The very center of the Milky Way, Sagittarius A* is a strong source of radio waves and probably a massive black hole.
Sagittarius Arm ...
Sagittarius A*: The powerful radio source located at the center of the Milky Way Galaxy.
SAGITTARIUS A
A complex radio source at the centre of the Milky Way Galaxy. At least a part of the energy is thought to originate from interactions in an accretion disc around a black hole with a mass a few million times that of the Sun.
Sagittarius also contains a number of interesting deep sky objects. The Milky Way appears densest in the constellation because that is where the galactic centre is located.
Sagittarius also tops out in bright gaseous nebulae (made mostly of glowing hydrogen lit up by nearby hot stars).
Sagittarius A, the galactic center of the Milky Way
Active galactic nuclei and pulsars have jets of charged particles which emit synchrotron radiation
Merging galaxy clusters often show diffuse radio emission ...
Sagittarius and Cancer ascend in two hours and forty minutes
Leo, Virgo, Libra and Scorpio take as much as three hours and fifteen minutes to ascend ...
Carina and Sagittarius Arm
There are at least two smaller arms or spurs, including:
orange ...
This image of Sagittarius A in the center of the Milky Way galaxy was taken by the Chandra X-ray Observatory. Image Credit: NASA/CXC/MIT/F.K. Baganoff et al.
View Larger Image → ...
A component of the Sagittarius Arm with noncircular gas motions. It is seen in absorption against Sgr A with a velocity of -53 km s-1, implying that at least part of the arm is expanding away from the galactic center.
Sagittarius A (Sgr A)
Sagittarius Arm
Sagittarius B2 (Sgr B2)
Sagittarius Dwarf Elliptical Galaxy
Sagittarius Dwarf Irregular Galaxy
Saha equation
Saiph (Kappa Orionis)
Sakurai's Object
Salpeter function ...
* The first X-ray emission was seen from the supermassive black hole, Sagittarius A*, at the center of the Milky Way. (Baganoff, et al, 2001)
* Chandra found much more cooler gas than expected spiralling into the center of the Andromeda Galaxy.
Lacaille originally depicted Telescopium as extending northwards between Sagittarius and Scorpius, as shown on the accompanying map by Bode, ...
Many of the objects in Sagittarius are emission nebulae and a list of them can be found here.
Other objects in Sagittarius
AAT 20 NGC 6589-90 reflection nebulae in Sagittarius
AAT 22 NGC 6520 open cluster and Barnard 86 ...
23(b) shows the bright radio source Sagittarius A, which lies at the center of the circle in Figure 23.22 and within the boxed region in Figure 23.23(a) and, we think, at the center of our Galaxy.
Yet another fine object to be found in the rich hunting grounds of Sagittarius a globular cluster known as M22. This bright cluster contains about 70,000 stars of which 32 are known to be variable.
Indeed, the galactic center is a very powerful radio source known as Sagittarius A (Sag A for short): the "A" designates the most powerful radio source located in that part of the sky called Sagittarius.
On the theory that the compact radio source Sagittarius A* is some kind of weak AGN, studies of kinematics near the Milky Way's nuclear become relevant.
But observations with radio and infrared radiation that could pass through the obscuring dust clouds in Sagittarius and elsewhere show that the Sun is quite far out in the Milky Way.
In 2012, Pluto's apparent path will be in Sagittarius about 3.5° south of its boundary with Scutum. During 2012 Pluto will be moving through the Milky Way with numerous background stars with a similar magnitude to the planet.
In fact, the Milky Way itself is currently subject to at least two minor mergers, with both the Sagittarius and Canis Major dwarf galaxies in the process of being shredded and absorbed.
The center of the Galaxy is in the direction of the constellation Sagittarius about 26,000 light years from our solar system. A strong radio source, called Sagittarius A, is seen at the center.
In the north, there are several OB associations in Cygnus alone, while you lucky folk in the southern hemisphere can view the many rich star fields in Sagittarius and Scorpius.
In the wonderfully creative way that astronomers name things, they decided to call this strong radio source Sagittarius A, or Sgr A for short. Isn't that clever?
That spectacular globular cluster in Sagittarius almost rivals nearby M22. It was discovered by Lacaille in 1752 and Messier observed it on July 24, 1778.
Father away, 26,000 light years from us in the center of our galaxy, sits Sagittarius A, a supermassive black hole four million times the mass of our Sun. Gas and dust between it and us hide it from our optical telescopes.
The major arms of the Milky Way galaxy are the Perseus Arm, Sagittarius Arm, Centaurus Arm, and Cygnus Arm; our Solar System is in a minor arm called the Orion Spur.
The Orion Arm, Perseus Arm and Sagittarius Arms of the galaxy are located in that quadrant. (Star Trek: Voyager background graphic) ...
Supermassive Black Hole at Center of Milky Way "Sagittarius A Star" National Geographic - November 2, 2005
The black hole at the center of the Milky Way is actually helping stars form Space.com - October 14, 2005 ...
Just like many other galaxies, the center of the Milky Way is a supermassive black hole named Sagittarius A*. It is 26,000 light years away from Earth and measures 22.5 million km across. The entire galaxy is 120,000 light years in diameter.
The center of the galaxy is a little above the "spout" of the teapot-shaped constellation Sagittarius at the upper right of this photograph. It's about 27,000 light-years away.
Capricorn is seen along the between Sagittarius and Aquarius. The brightest stars in Capricornus are Prima Giedi (Alpha 1 Cap) and Secunda Giedi (Alpha 2 Cap). The globular cluster M30 is in Capricorn.
Corona Australis is a small compact constellation nestled between Sagittarius and Scorpius, just east of Scorpion's stinger.
The discovery was made as part of Chandra's ongoing program of monitoring the region around Sagittarius A* (Sgr A*), the supermassive black hole at the center of the Milky Way.
Due to the precession of the Earth axis, the sun is now in the neighbouring constellation Sagittarius at this time of the year. The latitude on Earth on which Capricorn appears overhead of an observer is still known as the Tropic of Capricorn.
The original name of the constellation was Tubus Astronomicus. It is a small and faint constellation that can be found south of Sagittarius and Corona Australis.
the stars we know to be closer than 10 light-years, Ross 154 is another of those ubiquitous red dwarfs. Much too dim to be seen with the unaided eye, it is a thoroughly unremarkable-looking point of light in the crowded constellation Sagittarius as ...
The Milky Way is currently undergoing at least two minor mergers, with the Sagittarius and Canis Major dwarf galaxies, suggesting that this could be a real possibility.
The Earth is about 26,000 light-years from the center of the Milky Way Galaxy. The major arms of the Milky Way galaxy are the Perseus Arm, Sagittarius Arm, Centaurus Arm, and Cygnus Arm; our Solar System is in a minor arm called the Orion Spur.
glow red due to hydrogen's strongest spectral line); dark nebulae do not emit or reflect light, but are visible in silhouette against a brighter background of stars or diffuse nebulae; examples of diffuse nebulae include the M8 in Sagittarius and the ...
Modern stargazers tend to see Sagittarius as "the teapot." Alnasl marks the tip of the "spout," as is shown in this photo. Again, if you're a deep-sky aficionado, M 8 (Lagoon nebula) nearly aligns with this southern solstice point.
in Scorpio; and the eastern stream, which grows brighter as it passes southward through Scutum and Sagittarius. The brightest part of the Milky Way extends from Scutum to Scorpio, through Sagittarius. The center is in the direction of Sagittarius and ...
2002 - Astronomers present evidence for the hypothesis that Sagittarius A* is a supermassive black hole at the centre of the Milky Way galaxy, ...
 See also: Sagittarius, Sagitta, Constellation, Sun, Light
  
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