Spiral & Barred Spiral Galaxies

Demonstrate an understanding of the appearance of spiral and barred spiral galaxies

These are flattened disc galaxies consisting of a nucleus of stars from which spiral arms extend.

There are two types:

1. Spiral Galaxies. The spirals arms wind around the nucleus.

2. Spiral Barred (or Barred Spiral) The spirals extend from a bar through the nucleus.

Typically older stars are nearer the nucleus while younger stars are further out in the spiral arms.

 

Image New Window



Links New Window

Astronomy Picture of the Day Spiral Galaxies

SEDS Spiral Galaxies

 

Questions

What is the difference between a spiral and a barred spiral galaxy?