What is tuning fork classification of galaxies?

The diagram is roughly divided into two parts: elliptical galaxies (ellipticals) and spiral galaxies (spirals). Hubble gave the ellipticals numbers from zero to seven, which characterize the ellipticity of the galaxy – “E0” is almost round, “E7” is very elliptical.

What are the three basic types of galaxies found on the tuning fork diagram?

At this point in the diagram, the “tuning fork” shape forks — with three images of spiral galaxies on the top and three images of barred spiral galaxies on the bottom….His main types are:

• Spirals,
• Barred Spirals,
• Ellipticals,
• and Irregulars.

What is used to classify galaxies?

Edwin Hubble invented a classification of galaxies and grouped them into four classes: spirals, barred spirals, ellipticals and irregulars. The Hubble classification, often called the tuning fork diagram, is still used today to describe galaxies.

What are the four types of galaxy classifications?

In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies.

Why is Hubble’s galaxy classification system called the tuning fork?

Illustration 1: This is an illustration of Hubble’s classification of galaxies. The shape of the diagram somewhat resembles a tuning fork, hence it is sometimes called “the tuning fork”.

When did Edwin Hubble invent the tuning fork?

The most famous of these was invented by Edwin Hubble in 1936, and is often known as the Hubble tuning-fork because of the shape of its traditional diagram. Our Galaxy Classification workshop challenges students to attempt to classify a range of galaxies.

Where are the lenticulars in the Hubble tuning fork?

At the centre of the Hubble tuning fork, where the two spiral-galaxy branches and the elliptical branch join, lies an intermediate class of galaxies known as lenticulars and given the symbol S0.

What kind of classification scheme does Hubble have?

The Hubble classification of galaxies, also referred to as the ‘tuning fork’ diagram because of its shape, classes galaxies along three main lines into: The Hubble Classification scheme for galaxies, often referred to as the “tuning fork” diagram.