Hubble Captures a Luminous Globular Cluster

By Aazam

October 12, 2022

Terzon 1 is a globular cluster located approximately 22,000 light-years from Earth in the constellation Scorpius, one of 11 globular clusters

It was discovered between 1966 and 1971 by Turkish-Armenian astronomer Agop Terzhan. While he was working in France, which was mostly located at the Lyon Observatory

The 11 Terzon globular clusters are numbered from Terzon 1 to Terzon 12, which is confusingly due to the Terzon mistake in 1971

b He rediscovered Terzon 5—a cluster he had already discovered and reported back in 1968—and named it Terzon

He published his discovery with Terzan 9, 10, and 12. He quickly realized his mistake, and tried to rename Terzan 12 to Terzan 11

In this it was not clarified by him that Terzan 5 and Terzan 11 were one, another astronomer, Ivan Robert King, published a note to try to dispel this confusion

Most papers now recognize the original Terzan 5 and Terzan 12, and accept the oddity that Terzan 11 is not

Hubble's Wide Field Planetary Camera 2 (WFPC2). That instrument was replaced by the Wide Field Camera 3 (WFC3) during the 2009 Hubble servicing mission

WFC3 has better resolving power and a wider field of view than WFPC2, and the improvement is evident in this fantastically detailed picture