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Terzan 1 also known as ESO 455-23 and Terzan 1966, is a heavily obscured globular cluster located around 20.000 light-years from Earth in the constellation of Scorpius.

Terzan 1
Terzan 1 image taken with the Wide Field Planetary Camera 2 on board the NASA/ESA Hubble Space Telescope.[1]
Observation data (J2000 epoch)
ConstellationScorpius[1]
Right ascension17h 35m 47.8s[2]
Declination−30° 28 11.0[2]
Physical characteristics
Other designationsESO 455-23, Cl Haute-Provence 2, Cl VDBH 235, [KPS2012] MWSC 2635, C 1732-304, Cl Terzan 1, GCl 69
See also: Globular cluster, List of globular clusters

It is one of about 150 globular clusters discovered by the French astronomer Agop Terzan in the 1960s-70s, belonging to the Milky Way. Terzan 1 is also an X-ray source.

Terzan 1 has the smallest projected distance to the Milky Way’s center among all known globulars: is only 4,200 light-years from the center but 21,800 light-years from Earth.

In 1980, astronomers detected X-ray bursts from a source located in Terzan 1. Several years later, the source X1732-304 was detected within the cluster with NASA’s Spacelab 2 and ESA’s EXOSAT missions.[3]


References


  1. "A home for old stars". Retrieved 15 December 2015.
  2. "Search Result for Terzan 1". Retrieved 15 December 2015.
  3. "Terzan 1: Hubble Snaps Breathtaking Picture of Globular Cluster | Sci-News.com". Breaking Science News | Sci-News.com. Retrieved 2021-09-30.



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[de] Terzan 1

Terzan 1 ist ein rund 21.800 Lichtjahre entfernter Kugelsternhaufen im Sternbild Skorpion, der im Jahr 1966 von dem Astronomen Agop Terzan entdeckt wurde.[2]
- [en] Terzan 1



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