Glob­u­lar Clusters

Glob­u­lar clusters are spher­ic­al col­lec­tions of mostly ancient stars num­ber­ing between tens of thou­sands to a mil­lion or more stars stretch­ing 100 to 300 light years across. They are truly ancient struc­tures with a min­im­um age of about 11 bil­lion years. Most are believed to have formed at the same time as their par­ent galaxy. To date there are over 160 glob­u­lar clusters dis­covered in our Milky Way.

[descrip­tion from Rob Gend­ler­’s primer]

About Me

Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics. “Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”. Deep-sky astrophotography is my passion.