astronomy

We all take stars for granted, they are just there many are bright enough to be seen from the city. There are people who specialize in Spectography (Spectrography is the technique of recording and analyzing the spectrum of light or other radiation emitted or absorbed by materials. It is used in...

Clusters are seen in several forms, Open where the associated stars are spread out, Tight is it sounds a group of stars near each other, and Globular a "ball" of stars often looking like a Christmas Tree ornament, they can have hundreds of thousands of stars in the globular. This is M45 a open...