A barred spiral galaxy is a type of spiral galaxy that has a prominent bar-shaped feature in its center. This bar is a region of intense star formation and gas activity, and it is thought to be a key driver of the galaxy's structure and evolution.

In contrast, a normal spiral galaxy does not have a central bar. Instead, it has a more uniform distribution of stars and gas throughout its disk.

Here is a table summarizing the key differences between barred spiral galaxies and normal spiral galaxies:

| Feature | Barred Spiral Galaxy | Normal Spiral Galaxy |

|---|---|---|

| Central bar | Present | Absent |

| Star formation | Concentrated in central bar | More evenly distributed throughout the disk |

| Gas activity | Strong in central bar | Distributed throughout the disk |

| Disk structure | Often more elongated and boxy | More round and flattened |

Overall, barred spiral galaxies are a distinct type of spiral galaxy that are characterized by their prominent central bars. This bar-shaped feature is thought to play an important role in the galaxy's structure and evolution.