The Galactic Prelude

As I’m sure you know

As I’m sure you know Alice, Hannah and myself , love galaxies. We are all part of the Galaxy Zoo Project, and in its honour we have decided to launch Project Galaxy (being truthful Hannah and I pulled Alice … into it willingly of course )
Project Galaxy will detail the various categories and subcategories that exist in galactic morphology (shape and structure). This post is a simple list of some of the main types and gives an example for the main categories. The main project will go into each group and subgroup in much greater detail.
Spirals
AHZ10003aj Credit; Galaxy Zoo
The example I chose for the spirals section is this lovely two armed number.
I chose it as it has well formed arms and a very bright (potentially active) nucleus (centre).
The galaxy’s spectra as view on AEGIS has a reasonably high peak in H beta. This is hydrogen that has been energized previously but is now losing energy and this process emits radiation in at a very specific wavelength. Whilst a galaxy having a large amount of H beta relative to another variety of hydrogen - H alpha – is very unusual ...