2022 · Q69
The term ‘Sagittarius A*’, sometimes mentioned in news, refers to
current-eventssci-tech-news
- Aa supermassive black hole in our Milky Way Galaxy
- Btwo giant black holes spiralling around each other several light years away from the Earth
- Ca Supernova explosion seen in real time for the first time ever by scientists
- Da huge asteroid that passed by very close to the Earth
Explanation
Sagittarius A* (pronounced 'Sagittarius A-star') is the supermassive black hole at the centre of our Milky Way Galaxy, about 26,000 light-years from Earth, with a mass of roughly 4 million suns. In May 2022 the Event Horizon Telescope collaboration released its first image. It is not a binary black hole pair (option B), a supernova (option C), or an asteroid (option D). Hence option A.