Terzan 5

Terzan 5 is a heavily obscured globular cluster belonging to the bulge of the Milky Way galaxy. It was one of six globulars discovered by French astronomer Agop Terzan in 1968 and was initially labeled Terzan 11. The cluster was cataloged by the Two-Micron Sky Survey as IRC–20385. It is situated in the Sagittarius constellation in the direction of the Milky Way's center. Terzan 5 probably follows an unknown complicated orbit around the center of the galaxy, but currently it is moving towards the Sun with a speed of around 90 km/s.

Physical properties

The absolute magnitude of Terzan 5 is at least . The small core of Terzan 5—about 0.5 pc in size The cluster also contains around 1300 core helium burning horizontal branch (HB) stars, including at least one RR Lyrae variable star. ==Pulsars and X-ray sources==

Pulsars and X-ray sources

Terzan 5 is known to contain 49 millisecond radio pulsars as of December 2023, the largest MSP population among all globular clusters in the Galaxy; their true number may be as high as 200. ==Gallery==

Gallery

File:Commotion in a Crowded Cluster.jpg|Hubble Space Telescope image of the ancient globular cluster Terzan 5 File:The unusual cluster Terzan 5 (eso1630a).jpg|Terzan 5 is one of the bulge's primordial building blocks, most likely the relic of the very early days of the Milky Way. File:Terzan 5 Hubble+JWST.jpg|Terzan 5 with Hubble and James Webb Space Telescope ==Notes==

Source: Wikipedia ↗

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