NGC 7172 is a spiral galaxy located in the constellation Piscis Austrinus. It is located at a distance of about 110 million light years from Earth, which, given its apparent dimensions, means that NGC 7172 is about 100,000 light years across. [2] It was discovered by …

2022年4月1日 · When astronomers inspected NGC 7172 across the electromagnetic spectrum they quickly discovered that there was more to it than meets the eye: NGC 7172 is a Seyfert galaxy – a type of galaxy with an intensely luminous active galactic nucleus powered by matter accreting onto a supermassive black hole.

2022年3月28日 · The galaxy lies approximately 110 million light-years from Earth in the constellation Piscis Austrinus. The lane of dust threading its way across NGC 7172 — which is viewed side-on in this image — is obscuring the luminous heart of the galaxy, making NGC 7172 appear to be nothing more than a normal edge-on spiral galaxy.

2022年3月28日 · NGC 7172 is located approximately 110.5 million light-years away in the constellation of Piscis Austrinus.. The galaxy was discovered on September 23, 1834 by the English astronomer John Herschel.. Otherwise known as ESO 466-38, IRAS 21591-3206 or LEDA 67874, it has a diameter of 85,000 light-years. NGC 7172 is a member of the Hickson Compact Group 90, a galaxy group that also includes two ...

2022年3月28日 · 该星系位于距地球约 1.1 亿光年的奥斯林星座（Piscis Austrinus）。穿过 NGC 7172 的尘埃通道掩盖了该星系发光的中心，使得 NGC 7172 看起来只不过是一个正常的边缘旋涡星系。 当天文学家通过电磁波谱检查 NGC 7172 时，他们很快就发现，它并不像人们看到的那样。

1998年3月13日 · We present evidence of flux variability, on both short (hours) and long (months) time scales of the Seyfert 2 galaxy NGC 7172. These results are based on the ASCA observation of NGC 7172 performed on May 1996. The source was detected at a rather low flux level, about 3 times fainter than its usual state (including one year before, when it was also observed by ASCA). The source also varied by ...

NGC 7172 is a Spiral Galaxy in the Piscis Austrinus constellation. NGC 7172 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere. Given its visual magnitude of 13.61, NGC 7172 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.

2011年10月12日 · 1.2. NGC 7172. NGC 7172 is an edge on early-type spiral galaxy with a prominent dustlane crossing the galaxy from east to west (see Fig. 1). It is a member of the Hickson compact group HCG 90 at a redshift of 0.0087 (Sazonov et al. 2007). Marshall et al. (1979) identified NGC 7172 with the X-ray source H2158-321.

NGC 7172 Location. NGC 7172 location is 22 02 01.897 (R.A.) and -31 52 11.60 (Dec.). They are celestial equivalents of Longitude and Latitude. The right ascension (longitude) is the angular distance of an object along the celestial equator from the March Equinox. As a rough guide, the March Equinox is located in the constellation of Pisces.

NGC 7172 is a bright member of a small sub-group of the Grus-Indus galaxy cluster. The group is centred on the gaint elliptical galaxy, NGC 7176, which is the bright galaxy below NGC 7172. NGC 7176 appears to be interacting with one or possibly two other galaxies, the almost edge-on spiral NGC 7174, and the elliptical galaxy NGC 7173. ...