The one constant of humanity has been exploration and discovery. It is intriguing to suppose our descendants, some tens of thousands of years from now, will examine this region of space up close and personal.

It’s also intriguing to wonder what humanity might be like by then.

Watts Up With That?

Tail of stray black hole hiding in the Milky Way


It is difficult to find black holes, because they are completely black. In some cases black holes cause effects which can be seen. For example if a black hole has a companion star, gas streaming into the black hole piles up around it and forms a disk. The disk heats up due to the enormous gravitational pull by the black hole and emits intense radiation. But if a black hole is floating alone in space, no emissions would be observable coming from it.

A research team led by Masaya Yamada, a graduate student at Keio University, Japan, and Tomoharu Oka, a professor at Keio University, used the ASTE Telescope in Chile and the 45-m Radio Telescope at Nobeyama Radio Observatory, both operated by the National Astronomical Observatory of Japan, to observe molecular clouds…

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