Rogue Planet Discovered!

What is a rogue planet and how does it differ from a brown dwarf?

How did astronomers determine the age of the rogue planet?

Describe the significance of the discovery of the rogue planet mentioned in the text.

What challenges does the discovery of the rogue planet pose to the current definition of a planet?

What are some alternative names suggested for the rogue planet, and why might they be considered less appealing?