NGC 3561, also known as Arp 105, is a pair of interacting galaxies NGC 3561A and NGC 3561B within the galaxy cluster Abell 1185 in Ursa Major. It was discovered by British astronomer John Herschel on 30 March 1827. [6]

2025年3月8日 · Arp 105 is a dazzling ongoing merger between an elliptical galaxy and a spiral galaxy drawn together by gravity, characterized by a long, drawn out tidal tail of stars and gas more than 362,000 light-years long.

One of the cluster's brightest and most interesting objects is Arp 105, "the Guitar". The main protagonists in this maelstrom of interacting galaxies are the spiral galaxy (NGC 3561B) and the elliptical (NGC 3561A), along with a handful of tidal dwarf galaxies. The debris of their gravitational dance renders a shape reminiscent of a guitar.

2025年3月3日 · here's an image of the Abell 1185 galaxy cluster, located about 410 million light-years away in the direction of Ursa Major, and a member of the Leo supercluster. The most spectacular galaxy in this field is the pair of interacting galaxies NGC 3561 or Arp 105, known as the Guitar Galaxy.

2025年3月10日 · Arp 105 is located around 400 million light-years away from Earth in the constellation of Ursa Major. Also known as NGC 3561, it was discovered by the British astronomer John Herschel on March 30, 1827. It consists of two massive galaxies: the elliptical galaxy NGC 3561B and the spiral galaxy NGC 3561A.

2018年3月15日 · This view of the galactic collision NGC 3561 (Arp 105) was acquired in March 2018. View additional information .

We present a study of one of the most remarkable examples of ongoing galaxy mergers, Arp 105, which resides in the nearby rich cluster Abell 1185. The result of a violent encounter between a spiral galaxy and a larger elliptical, Arp 105 is characterized by a long plume of material that ends in a spray of stars and star clusters more than 100 ...

2023年3月28日 · A nearby rich galaxy cluster Abell 1185 and one of the most remarkable examples of ongoing galaxy mergers, Arp 105 (NGC3561/NGC 3561A) residing in this cluster. Arp 105 has been formed as a result of a violent encounter between a spiral galaxy NGC 3561A and a larger elliptical NGC 3561B.

2020年4月12日 · Most interesting part of the cluster is Arp 105 (common name "the Guitar", which can be easily found in the picture), formed by interacting galaxies NGC 3561 and 3561A and a tail-like tidal structure (guitar neck), stretched in northern direction from NGC3561A. The small tidal dwarf galaxy just south of NGC 3561 is known as Ambartsumian’s Knot..

2019年7月6日 · Arp 105 (the Guitar or I’d call it the Geyser) consists of three galaxies in Arp’s ‘E and E-like Galaxies – Connected to Spirals’ class. The top galaxy with the plume is NGC 3561A (NGC 3561N, VV 237c and others). The middle galaxy is NGC 3561 (NGC 3561B, UGC 6224, VV 237a and many others).