Astronomy Without A Telescope - Secular Evolution - Universe Today
[/caption] A traditional galaxy evolution model has it that you start with spiral galaxies – which might grow in size through digesting smaller dwarf galaxies – but otherwise retain their spiral form relatively undisturbed. It is only when these galaxies collide with another of similar size that you first get an irregular ‘train-wreck’ form, which … Continue reading "Astronomy Without A Telescope – Secular Evolution"