An unusual galaxy that formed at the dawn of our universe has left astronomers scratching their heads. An international team of astronomers has found a massive galaxy that existed just 1.8 billion years after the big bang — called XMM-2599 — that has stopped forming stars. After about 400,000 years, stars began to form, as did massive galaxies. It's believed that stars in young, massive galaxies like XMM-2599 should have stopped forming when the galaxies were roughly three billion years old. But, he added, in order for that to happen, you need a supremely massive black hole.

Source: CBC News February 06, 2020 09:00 UTC