There are three main types of galaxies: spiral galaxies which have spiral arms radiating from a central core, elliptical galaxies which are spherical or oval in shape, and irregular galaxies which have no defined shape and may exhibit unusual features like radio emissions or gas jets. The document provides examples of each type of galaxy including the Andromeda Galaxy and Milky Way as spiral galaxies, M100 as an elliptical galaxy, and the Magellanic Clouds and Antennae Galaxies as irregular galaxies.

1. Types of Galaxies

2. Spiral Galaxies
• Spiral galaxies are flattened
pinwheels in shape. They can
have from one to three spiral
arms coming from a central core.

3. Great Andromeda
Milky way
Galaxy

4. • Hubble Photo of Galaxy
M100
• The Hubble Space
Telescope captured this
image of the core of
galaxy M100. M100 is a
spiral galaxy about 1,500
light-years from Earth.
• NASA/Liaison Agency

5. Edwin Hubble
intermediately oval
extremely elongated
very round

6. Irregular Galaxies
Magellanic Clouds
Large Magellanic
Clouds
Small Magellanic
Clouds
Bar in its Center
More Formless

7. Large Magellanic Cloud

8. Irregular Galaxies
They could show features of several galaxy
types, have strong emissions of radio waves,
have giant jets of gas spewing out from the
nucleus, among other peculiarities.

9. Antennae Galaxies

10. The Grasshopper