In any globular cluster, all its stars formed at the same time, from the same cloud of gas. The Milky Way has around 150 known globular clusters; these objects are excellent tools for studying, for example, the history of the Universe, or the dark matter content of the galaxies they orbit.

Astrophysicists have uncovered a possible swarm of over 100 stellar-mass black holes hidden within a stellar cluster known as Palomar 5.

Across the sky, more than 100 stellar-mass black holes are hidden within a large cluster of stars. The star cluster is named Palomar 5, and it stretches out over 30,000 light-years. It is located about 80,

The most massive discovered black hole jets, extending on to incredibly 23 million light-years. To look it through that lens, that’s approximately the length of 140 Milky Way galaxies positioned in a straight line.