Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way. Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius , about 5.6° south of the ecliptic , [ 7 ] visually close to the ...

Sagittarius A (Sgr A) is a complex radio source at the center of the Milky Way, which contains a supermassive black hole. It is located between Scorpius and Sagittarius, and is hidden from view at optical wavelengths by large clouds of cosmic dust in the spiral arms of the Milky Way.

人馬座A*（Sagittarius A*，簡寫為Sgr A*，星號*讀作「star」或「星」 [3] ）是個位於銀河系 中心的超大質量黑洞 [4] [5] [6] 。 它位於星座 人馬座 和 天蠍座 的邊界附近，大約位於 黃道 以南5.6° [ 7 ] ，視覺上接近 蝴蝶星團 （M6）和 尾宿八 （天蠍座λ）。

Sagittarius A (Sgr A) is a complex radio source located at the centre of the Milky Way Galaxy. The radio source consists of the supernova remnant Sagittarius A East, the spiral structure Sagittarius A West, and the bright compact radio source at the …

A full-synthesis map of Sgr A has been made at 5 GHz by combining data taken with the Westerbork and Owens Valley radio telescopes. The sidelobe level is less than 10 % and the angular resolution is 6.3" x 34", which corresponds to a linear resolution of 0.3 x 1.7 pc at a distance of 10 kpc.

2024年8月28日 · 人马座A* （Sagittarius A*，简写为 Sgr A*， 星号* 读作“star”或“星” [3]）是个位于 银河系 中心 的 超大质量黑洞 [4][5][6]。 它位于星座 人马座 和 天蝎座 的边界附近，大约位于 黄道 以南5.6° [7]，视觉上接近 蝴蝶星团 （M6）和 尾宿八 （天蝎座λ）。 这颗天体是明亮致密的 射电源。 人马座A*的名字有其历史渊源。 在 1954年 [8]， 约翰·丹尼尔·克劳斯 、柯贤清（Hsien-Ching Ko）和肖恩·马特（Sean Matt）列出了他们用 俄亥俄州立大学 射电望远镜在250MHz下 …

2013年8月29日 · The center of the Milky Way galaxy, with the supermassive black hole Sagittarius A* (Sgr A*), located in the middle, is revealed in these images. As described in our press release, astronomers have used NASA’s Chandra X-ray Observatory to take a major step in understanding why material around Sgr A* is extraordinarily faint in X-rays.

In this paper we simultaneously fit the orbits and line-of-sight velocities of the ionized gas around the supermassive black hole, Sagittarius A* (Sgr A*), at the center of the Milky Way.

The VLA has been used to map the continuum emission distribution of the radio source Sgr A at 6 and 20 cm, with a resolution of 5 x 8 arcsec. These maps are then used to obtain the spectral index distribution over Sgr A.

R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across. Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom. Click to enlarge. From Redmond , SgrA is not readily observable since it lies so far south that it will never rise more than 13° above the horizon.