system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:If Voyager 1 has entered interstellar space (currently at 135AU), how can the theoretical Planet IX orbit the sun at upto 1500 AU?

Wouldn't that make it a rogue planet in interstellar space?
gpt
The border of our solar system is pretty vague and open to interpretation. Some would say past Pluto, some would say past the Oort cloud, etc.  There's been a few different times when there were reports of Voyager leaving our solar system and it really all matters on where you define the border to be.