system
Given the following post, respond as if you're commenting on Reddit:
human
Why does Sagittarius A* have the * in it's title?

Always wondered why the \* appears in the title. Whenever I see it I keep searching for a footnote at the bottom of the article!
gpt
Sagittarius A was discovered as a radio source in 1931. It was later discovered that Sgr A is itself comprised of multiple components. The bright and compact central component was named Sagittarius A*, there's also Sgr A East which appears to be an unusually large supernova remnant and Sgr A West which may be associated with material moving towards the black hole.