Messier 71 (also known as M71, NGC 6838, or the Angelfish Cluster) is a globular cluster in the small northern constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of non-comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775. [8]

2024年9月13日 · This spectacular NASA/ESA Hubble Space Telescope image shows a bright scattering of stars in the small constellation of Sagitta (the Arrow). This is the center of the globular cluster Messier 71, a great ball of ancient stars on the edge of our galaxy around 13,000 light-years from Earth. M71 is around 27 light-years across.

2010年8月23日 · This spectacular NASA/ESA Hubble Space Telescope image shows a bright scattering of stars in the small constellation of Sagitta (the Arrow). This is the centre of the globular cluster Messier 71, a great ball of ancient stars on the edge of our galaxy around 13 000 light-years from Earth. M71 is around 27 light-years across.

2024年9月13日 · M71 is located roughly 13,000 light-years from Earth in the constellation Sagitta. This Hubble image of M71 was created from images taken with the Wide Field Channel of the Advanced Camera for Surveys on Hubble. taken through yellow (F606W — colored blue) and near-infrared (F814W — colored red) filters.

2014年12月10日 · Explanation: Now known to be a globular star cluster at the tender age of 10 billion years, M71 is a mere 13,000 light-years away within the narrow boundaries of the faint constellation Sagitta. Close to the plane of the Milky Way galaxy in planet Earth's sky, its 10,000 or so member stars are gathered into a region about 27 light-years across ...

Messier 71, also known as M71 or NGC 6838, is a globular cluster situated in the small but distinctive constellation of Sagitta, the Arrow. It was first discovered by the French astronomer Philippe Loys de Ch?seaux in 1746, and then independently rediscovered by Charles Messier in …

2021年11月22日 · Ever since it was discovered in 1746 by the Swiss astronomer Jean-Philippe Loys de Chéseaux, the nature of Messier 71 has been the subject of some questioning. Over the centuries, it has been classified as both an abnormally dense open star cluster and as an unusually loose globular cluster.

Globular cluster M71 is one of my favorite visual targets, and its attractive with an image sensor too. It isn't as spectacular as some of some of the grander clusters like the Great Hercules Cluster, but the colorful star background of the Milky Way adds a lot of drama to the background that many of those "other" globular clusters don't have.

Today most astronomers consider M-71 to be a very loose globular star cluster that is a part of a small and unique group of globulars with metal-rich stars. This class of "disk population globular clusters" includes the famous southern sky cluster NGC 104 (47 Tucanae).

Messier 71 or M71 (also designated NGC 6838) is a globular cluster in the constellation Sagitta. It has an apparent visual magnitude of 8.2 and its angular diameter is 7.2 arc-minutes. M71 lies at an estimated distance of 12,700 light years. The Equinox 2000 coordinates are RA= 19h 53.8m, Dec= +18° 47´ which makes M71 best seen during the summer.