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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]
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.
Messier 4, located in the constellation Scorpius, is a huge, spherical collection of stars known as a globular cluster. At just 5,500 light-years away, it is the closest globular cluster to Earth, making it a prime object for study.
That’s Messier 4, called M4 for short. It’s a globular star cluster, an ancient member of our Milky Way galaxy. M4 shines at magnitude +5.9, so it may be visible as a smudge on the sky under ...
Description: M4 is one of the most open, or loosely constructed of globular clusters, as its high-classification of IX indicates (the higher the number, the less dense the cluster). Its central...
Messier 4 is a Globular Cluster in the Scorpius constellation. Messier 4 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere. Given its visual magnitude of 5.4, Messier 4 is barely visible to the naked eye, easily visible with the help of a small binocular.
Description: M4 is one of the most open, or loosely constructed of globular clusters, as its high-classification of IX indicates (the higher the number, the less dense the cluster). Its...
Messier 4 is a beautiful globular cluster, one of the largest and closest to us. It was first observed by P. L. de Cheseaux in 1746. In May 1764 Messier described it as a cluster of very small stars, which with smaller telescopes appears more like a nebula.
Messier 4 is one of the easiest globular clusters to locate. It is just 1.3 degrees due west of Antares, the red first magnitude star in Scorpius that is very prominent in the southern sky on summer evenings. It is easy to spot with binoculars.
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