Changes

==Classification==

==Classification==

Irregular galaxies are split into two groups, "Irr I" and "Irr II".<ref name=britannica/> Type Irr I is much more common than Irr II and have similarities with [[spiral galaxy|spiral galaxies]] such as containing mostly blue [[star]]s and some have a bar. They do not have any arms and have a very small nucleus if any, and so are sometimes considered an extension of the Sc class of spiral galaxies on the Hubble tuning fork diagram.

Irregular galaxies are split into two groups, "Irr I" and "Irr II".<ref name=britannica/> Type Irr I is much more common than Irr II and have similarities with [[spiral galaxy|spiral galaxies]] such as containing mostly blue [[star]]s and some have a bar. They do not have any arms and have a very small nucleus if any, and so are sometimes considered an extension of the Sc class of spiral galaxies on the [[Hubble tuning fork diagram]].

Meanwhile, Irr II galaxies tend to be red and also contain large amounts of dust.<ref name=britannica/><ref>[http://www.astro.cornell.edu/academics/courses/astro201/galaxies/types.htm Galaxy classification] from astro.cornell.edu</ref> This dust makes it very difficult to identify individual stars in a type Irr II galaxy.

Meanwhile, Irr II galaxies tend to be red and also contain large amounts of dust.<ref name=britannica/><ref>[http://www.astro.cornell.edu/academics/courses/astro201/galaxies/types.htm Galaxy classification] from astro.cornell.edu</ref> This dust makes it very difficult to identify individual stars in a type Irr II galaxy.