Rogue Planets, Loners of the Universe

The video explores rogue planets, which are large planets not bound to any star. These planets are more common than previously thought, with early signs observed in the mid-2000s. A notable discovery is PSOJ 318.5-22, a young rogue planet found using the Pan-STARRS telescope. Theories on their formation include planet scattering and ejection by red giants. Despite their isolation, rogue planets are independent and numerous, with billions potentially existing in the galaxy.

What was the significance of the discovery of PSOJ 318.5-22?

How do scientists estimate the number of rogue planets in the universe?