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

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.

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.