A supermassive black hole... in the middle of our galaxy 😯 🌌 BBC

Subscribe and 🔔 to OFFICIAL BBC YouTube 👉 Stream original BBC programmes FIRST on BBC iPlayer 👉 Scientists have found a supermassive black hole in the centre of the Milky Way. Professor Brian Cox shows us the evidence of how we know it’s there. #BBC #BrianCoxsAdventures #BBCiPlayer