Look at the glamour of the stars of the ball cluster in the Hubble picture

Look at the glamour of the stars of the ball cluster in the Hubble picture

Terzan 1 is an orbital cluster located about 2,000 light years away from the Earth in the constellation Scorpion, one of the 11 balloon clusters discovered by Turkish-Armenian astronomer Agop Terzan from 1966 to 1971, when he worked at the Lyon Observatory.

Terzan 1 is believed to be the nearest ball cluster to the Milky Way, only 4,200 light-years away from it to the center of our galaxy, and objects like Terzan 1 are common in the universe.

These are a large number of stars that are closely associated with gravity and turn around the galaxy center as a satellite. The diameter of such objects can be several hundred light-years. It is believed that each galaxy has many globular clusters. Some, such as the Milky Way, have several hundred, and giant elliptical galaxies may have several thousand.

Unlike the scattered balloon clusters that are in the disk of galaxies, the balls are in the surrounding halo. They contain some of the oldest stars in the galaxy. The age of the stars in the ball cluster shows that they formed in the early stages of galaxy formation.

Interestingly, the 11 balloon clusters discovered by Terzan are numbered in order from Terzan 1 to Terzan 12. This is due to a mistake made by a scientist in 1971 when he re-opened Terzan 5 — a cluster that had been discovered since 1968 — and called it Terzan 11.

The new picture is not the first picture of Terzan 1 taken by Hubble. As early as 2015, ESA published an image obtained by Hubble's wide-angle planetary camera.