NGC 185 (also known as Caldwell 18) is a dwarf spheroidal galaxy located 2.08 million light-years from Earth, appearing in the constellation Cassiopeia. It is a member of the Local Group, and is a satellite of the Andromeda Galaxy (M31). [6] NGC 185 was discovered by William Herschel on November 30, 1787, and he cataloged it "H II.707". [6]

2024年8月23日 · Also known as NGC 185, it is a member of the Local Group of galaxies. Caldwell 18 is notable for its active galactic nucleus, a region at the center of the galaxy that emits extreme radiation over part of the electromagnetic spectrum. Some astronomers classify Caldwell 18 as a type II Seyfert galaxy. These types of galaxies appear intensely ...

NGC 185 是 仙后座 的一个 矮椭圆星系，也是 仙女座星系 的 卫星星系 之一。 至少有两种技术被用来测量NGC 185的距离。 表面亮度波动距离测量技术根据星系外观的颗粒度来估计星系的距离，使用此技术测量到到NGC 185的距离为2.08±0.15Mly (640 ± 50 kpc) [3]。 然而因为NGC 185足够接近地球，可以使用红巨星分支尖端方法来估计其距离。 使用此技术估计NGC 185 的距离为2.02 ± 0.2Mly (620 ± 60 kpc) [4][5]。 ^ 跳转到： 1.0 1.1 1.2 1.3 1.4 NGC 185. SIMBAD. 斯特 …

2024年1月1日 · NGC 185 and NGC 147 are only one degree apart in the sky, and just over 7° north of the Andromeda Galaxy. Both are dwarf ellipticals found in M31’s outer halo, but farther out than M32 and...

NGC 185 是位于 仙后座 的一个 矮椭圆星系 或 球状星系。 它是 仙女座星系 的 卫星星系 之一。 也是 本星系群 的众多 矮星系 中的一员。 NGC 185并非只含古老恒星，也具有少量的年轻恒星以及一些气体和尘埃。 两个大的 尘埃云 组成一个不连续的、近似圆形的壳，其中心位于星系上，偏离星系中心约200光年。 年轻的蓝色恒星散布于星系表面，在靠近中心的区域很多， 中性氢 则集中于一侧。 [1] 对于这一异常现象，一个可能的解释为：约100亿年前，NGC 185在绝大部分 …

2023年8月7日 · The ground-based image of Caldwell 18 (NGC 185) in the top left is from the Digitized Sky Survey (DSS) and shows the sites of some additional Hubble observations of the galaxy. The image in the upper right is a composite of observations taken by the Advanced Camera for Surveys (ACS), while the bottom two images are composites from the Wide ...

NGC 185 is a Elliptical Galaxy in the Cassiopeia constellation. NGC 185 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its visual magnitude of 9.2, NGC 185 is visible with the help of a binocular with a 60-70mm aperture or a small telescope.

2025年1月12日 · NGC 185 (PGC 2329, UGC 396, Caldwell 18 and others) is a dwarf spheroidal galaxy located approximately 2.15 million light-years away in Cassiopeia. It is a member of the Local Group and a satellite of M31.

NGC 185: 위치 별자리 카시오페이아자리: 적경: 00 h 38 m 58.0 s: 적위 +48° 20′ 15″ 물리적 성질 시선 속도-202 ± 3 km/s: 거리 205만 ± 13만 광년(630 ± 40 kpc) 형태 dSph/dE3 규모 크기 11'.7 X 10'.0 광학적 성질 겉보기등급 +10.1 기타 성질 명칭 NGC 185, UGC 396, PGC 2329

2023年8月7日 · The ground-based image of Caldwell 18 (NGC 185) from the Digitized Sky Survey (DSS), shown in the bottom left, includes a white square that outlines the area of the galaxy imaged by Hubble’s Wide Field Camera 3 (WFC3).