Hubbles Galaxy Classification Diagram The Tuning Fork

Elliptic galaxies lenticular galaxies and another group called spiral galaxies after their resemblance to spirals. Among the large galaxies in the universe outside of clusters most are spiral.

Galaxies

Created the tuning fork diagram in an attempt to related the types of galaxies some astronomers thought it was to be observed as an evolutionary sequence but has since been discarded galaxies do not evolve from one type to another instead collisions and tidal interaction between galaxies may be primary factors in evolutionary process.

Hubbles galaxy classification diagram the tuning fork. As one of the first steps towards a coherent theory of galaxy evolution the american astronomer edwin hubble developed a classification scheme of galaxies in 1926. The hubble classification scheme for galaxies often referred to as the tuning fork diagram. Hubble is credited with creating a classification scheme for galaxies which is usually referred to as his tuning fork diagram.

As one of the first steps towards a coherent theory of galaxy evolution the american astronomer edwin hubble developed a classification scheme of galaxies in 1926. Go back to the galaxies you looked at in exercise 1 shown again in the table below. Large elliptical galaxies are more common in clusters of galaxies than they are outside of clusters.

Elliptical galaxies are bluer and contain more dust than spiral galaxies. This is a classical type of image still used by astronomers today to show how galaxies are classified. Edwin hubble originally identified an evolutionary sequence for the galaxies from early type to late type as one moved from left to right across the diagram.

There are several schemes in use by which galaxies can be classified according to their morphologies the most famous being the hubble sequence devised by edwin hubble and later expanded by gérard de vaucouleurs and allan sandage. Although this scheme also known as the hubble tuning fork diagram is now considered somewhat too simple the basic ideas still hold. Edwin hubble the hubble tuning fork exercise 2.

Tuning fork style diagram of the hubble sequence galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance. Spiral galaxies have younger stars than elliptical galaxies. Diagram of hubbles tuning fork classification scheme from hubblesite.

Hubbles tuning fork hubble found three main groups of galaxies that had distinct shapes. The spirals are divided into two subgroups depending on how their core is shaped. It is often known colloquially as the hubble tuning fork diagram because of the shape in which it is traditionally represented.

Although this scheme also known as the hubble tuning fork diagram is now considered somewhat too simple the basic ideas still hold. The hubble sequence is a morphological classification scheme for galaxies invented by edwin hubble in 1926.

Galaxies