M51 ULS 1b - M51 Whirlpool Galaxy Extragalactic Planet Candidate

The video discusses the Whirlpool Galaxy, also known as Messier 51, and its significance as the location of the first exoplanet found outside the Milky Way Galaxy. This exoplanet, located in the constellation of Kenneth, orbits a sun-like star that is part of an X-ray binary system with a neutron star or black hole. The discovery was made using NASA's Chandra X-ray Observatory by observing the dimming of X-rays, a method known as transits. The exoplanet is named M51 U LS1B and is approximately 28 million light years from Earth.

What is the significance of the discovery of the first exoplanet outside the Milky Way?

What is the name given to the exoplanet by its discoverers?