system
Given the following post, respond as if you're commenting on Reddit:
human
What is the big light at the center of galaxies such as the Milky Way or Andromeda?

Is it one huge star? A huge amount of stars all close together? Something completely different?

**edit: It says there are 4 comments in this post so far, yet I can only see one. Is something wrong with my post or are those invisible comments posted by shadowbanned people?**
gpt
The density of starts increases near the center of these galaxies. So its a huge number of starts that are close together. At the very center of galaxies are supermassive black holes, which don't themselves emit light.