ARIES-led decade-long study of blazar OJ 287, a binary supermassive black hole
A study coordinated by ARIES, Nainital, with 106 scientists from 18 countries, tracked the blazar OJ 287 from 2015 to 2025. OJ 287, about 4 billion light years away, has two supermassive black holes in a 12-year orbit. The study estimated the central black hole at no less than 3.89 billion solar masses.
UPSC angle: Prelims: space science terms. · Mains: limited.
6 Oct 2026