The compact radio source Sgr A* at the centre of our Galaxy harbours a super-massive black hole. and is therefore the nearest laboratory for testing the super-massive black hole astrophysics and environment. Since it is not an active galactic nucleus. it also offers the possibility of observing the capture of low-mass objects. https://www.spidertattooz.com/OPI-Infinite-Shine-All-Your-Dreams-in-Vending-Machines-ISLT84-p27376/