PA-99-N2: First Extragalactic Planet Beyond Milky Way
Scientists have a firm belief that there are millions of planets in our neighboring, Andromeda Galaxy. However, they have only identified one so far, named PA-99-N2, due to a microlensing event in 1999. Therefore, this confirmation makes it the very first extragalactic planet. Finding planets in space is challenging because they don’t emit their own […]