Galax­ies are by defin­i­tion vast rotat­ing sys­tems of stars, gas and dust. They are the build­ing blocks of the uni­verse. Galax­ies range in size from dwarf types, only a few thou­sand light years across to great spir­al and ellipt­ic­al galax­ies span­ning sev­er­al hun­dred thou­sand light years across. They con­tain any­where from a few mil­lion to as many as one tril­lion stars.

The earth is loc­ated with­in a large spir­al arm (the Ori­on arm) in a spir­al galaxy we call the “Milky Way”. The closest galaxy sim­il­ar to our own is the Andromeda Galaxy (M31).

[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.