NGC 520, also known as the Flying Ghost, [5] is a pair of colliding spiral galaxies about 105 million light-years away in the constellation Pisces. [6] They were discovered by astronomer William Herschel on 13 December 1784.

NGC 520 是 雙魚座 的一個 星系。

2021年9月8日 · The jumble of stars, gas, and dust that is NGC 520 is now thought to incorporate the remains of two separate disk galaxies. A defining component of NGC 520 — as seen in great detail in the featured image from the Hubble Space Telescope — is its band of intricately interlaced dust running vertically down the spine of the colliding galaxies.

2008年4月24日 · NGC 520 is one of the brightest galaxy pairs on the sky, and can be observed with a small telescope toward the constellation of Pisces, the Fish, having the appearance of a comet. It is about 100 million light-years away and about 100,000 light-years across. The galaxy pair is included in Arp's catalogue of peculiar galaxies as ARP 157.

NGC 520 is one of the brightest galaxy pairs on the sky, and can be observed with a small telescope toward the constellation of Pisces, the Fish, having the appearance of a comet. It is about 100 million light-years away and about 100 000 light-years across. The galaxy pair is included in Arp's catalogue of peculiar galaxies as Arp 157.

NGC 520 也被称为 Arp 157，位于约 1 亿光年之外，跨度约 10 万光年，用小型望远镜可以看到鱼座（双鱼座）的方向。 尽管 NGC 520 中的恒星速度很快，但距离如此之远，以至于在我们的有生之年，肯定不会明显改变其形状。

2024年1月1日 · Although this deep-sky object is cataloged as NGC 520, it’s actually a pair of interacting spiral galaxies in the constellation Pisces the Fish. German-born English astronomer William Herschel...

2008年4月24日 · NGC 520 is one of the brightest galaxy pairs on the sky, and can be observed with a small telescope toward the constellation of Pisces, the Fish, having the appearance of a comet. It is about 100 million light-years away and about 100,000 light-years across. The galaxy pair is included in Arp's catalog of peculiar galaxies as Arp 157.

NGC 520, at visual magnitude 12, has been noted to be one of the brightest interacting galaxies on the sky, after interacting pairs of galaxies known as the Antennae. NGC 520 was imaged above in spectacular fashion by the Gemini Observatory in Hawaii, USA.

Links to pictures of NGC 520 (= Arp 157 = UGC 966) John Hibbard, NRAO. The HI data were obtained at the VLA in 12/90 & 5/91. The Halpha, B- and R-band data were obtained with the KPNO 0.9m in 10/92. CO data were obtained from OVRO with Min Yun in 12/94. Publications.