SSC IB ACIO Grade II Mock Test 2023 General Knowledge Geography (World Geography) Origin and evolution of Universe Solar system
The term 'Sagittarius A*', sometimes mentioned in news, refers to
1
a supermassive black hole in our Milky Way Galaxy
2
two giant black holes spiralling around each other several-light years away from the Earth
3
a Supernova explosion seen in real time for the first time ever by scientists
4
a huge asteroid that passed by very close to the Earth