NGC 7331, also known as Caldwell 30, is an unbarred spiral galaxy about 40 million light-years (12 Mpc) away in the constellation Pegasus. It was discovered by William Herschel on 6 September 1784. [4] The galaxy appears similar in size and structure to the Milky Way, and is sometimes referred to as "the Milky Way's twin". [5]

NGC 7331，即科德韦尔30（Caldwell 30），是距离地球约40 × 10 6 光年（12百万秒差距）的无棒螺旋星系，在天球上位于飞马座。 该星系于1784年被 威廉·赫歇尔 发现 [ 3 ] 。

2023年10月28日 · NGC 7331 is an unbarred spiral galaxy located 39.8 million light-years away in the constellation Pegasus. With an apparent magnitude of 10.4, it can be seen in small telescopes. It is the brightest galaxy in the NGC 7331 Group, a visual grouping that also includes four more distant galaxies.

2018年2月2日 · This NASA/ESA Hubble Space Telescope image shows a spiral galaxy known as NGC 7331. First spotted by the prolific galaxy hunter William Herschel in 1784, NGC 7331 is located about 45 million light-years away in the constellation of Pegasus (the Winged Horse).

NGC 7331 Group is a visual grouping of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is a foreground galaxy in the same field as the collection, which is also called the Deer Lick Group. [1]

NGC 7331群是在飛馬座中一個可以透過光學望遠鏡觀測的星系群。螺旋星系 NGC 7331是與這個群在同一方向上的前景星系，也稱為Deer Lick Group [1] ，它擁有四個成員，被暱稱為"跳蚤"：透鏡或無棒螺旋星系NGC 7335和7336、棒旋星系NGC 7337和橢圓星系NGC 7340。

2022年9月22日 · Explanation: Big, beautiful spiral galaxy NGC 7331 is often touted as an analog to our own Milky Way. About 50 million light-years distant in the northern constellation Pegasus, NGC 7331 was recognized early on as a spiral nebula and is actually one of the brighter galaxies not included in Charles Messier’s famous 18th century catalog.

2023年9月14日 · Explanation: Big, beautiful spiral galaxy NGC 7331 is often touted as an analog to our own Milky Way. About 50 million light-years distant in the northern constellation Pegasus, NGC 7331 was recognized early on as a spiral nebula and is actually one of the brighter galaxies not included in Charles Messier’s famous 18th century

2022年10月5日 · NGC 7331 is a superb spiral galaxy lying in northern Pegasus, one of the brightest visible in the autumn sky, which can be found in apertures as small as 60–80mm (~three inches). It is a fine sight through a moderate-aperture telescope, looking like a miniature version of mighty Messier 31 in Andromeda, and makes an irresistible imaging ...

About 40 million light-years distant in the constellation Pegasus, NGC 7331 is often touted as an analog to our own Milky Way Galaxy. Adam Block / Mount Lemmon SkyCenter / University of Arizona. Among the stars of Pegasus, the Winged Horse, are some of the fall sky’s best galaxy groups for backyard observers.