Messier 4 or M4 (also known as NGC 6121 or the Spider Globular Cluster) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. [9] It was the first globular cluster in which individual stars were resolved. [9]

Jan 31, 2015 · Messier 4 (M4) is a bright globular cluster located in the southern constellation Scorpius. It lies at an approximate distance of 7,200 light years from Earth and has an apparent magnitude of 5.9. The cluster has the designation NGC 6121 in the New General Catalogue.

One of the sky's most remarkable globular clusters, Messier 4, aka M4 or NGC 6121, resides in the constellation of Scorpius. As one of the closest globular clusters to Earth, M4 presents a particularly fascinating study of stellar dynamics, evolution, and population.

Messier 4 or NGC 6121, is a globular star cluster located in the constellation of Scorpius, only 1.3 degrees west of Antares (α Scorpii). It measures 75 light-years across. The structure consists of 11th-magnitude stars. At least 43 variable stars have been observed within M4.

Jul 31, 2019 · M4 (NGC 6121) at approximately 7,200 light years away is one of the closest star clusters to our Solar System. It's very near the bright orange star Antares, which is the heart of Scorpio, currently high in the Southwest in our early night sky.

Mar 18, 2023 · Messier 4 (M4) is a brilliant globular cluster in the constellation of Scorpius, which is best viewed in summer. At approximately 5,500 light-years away, M4 is one of the nearest globulars to Earth and one of the brightest in the night sky.

Apr 28, 2018 · Name(s): M4, Messier 4, NGC 6121. Type: Globular Cluster. RA: 16h 23m 34s. Dec: -26º 31’ 25” Constellation: Scorpius. Size (arcmin): 26 arcmin. Magnitude: +5.6. Distance: 7,200 ly

Sep 5, 2012 · This wide-field view is centred on the globular star cluster Messier 4 (NGC 6121) in the constellation of Scorpius (The Scorpion). It is a colour composite made from exposures from the Digitized Sky Survey 2 (DSS2).

Messier 4, also known as NGC 6121, is a globular cluster located in the constellation Scorpius. Discovered by Philippe Loys de Chéseaux in 1746 and later cataloged by Charles Messier in 1764, this dense stellar assembly is situated approximately 7,200 light-years away from Earth.

Apr 11, 2012 · Messier 4 or M4 (also designated NGC 6121) is a globular cluster in the constellation Scorpius. It has an apparent visual magnitude of 5.6 and its angular diameter is 26.3 arc-minutes. M4 lies at an estimated distance of 7200 light years. The Equinox 2000 coordinates are RA= 16h 23.6m, Dec= -26° 32´ which makes M4 best seen during the summer.