What is the galactic underworld?  #SpaceSaturday « Adafruit Industries - Makers, Hackers, Artists, Designers, Engineers!

What is the galactic underworld? #SpaceSaturday « Adafruit Industries – Makers, Hackers, Artists, Designers, Engineers!

In the Star Wars galaxy, the underworld is where you might find Cantina, or some miserable Hive villains, to hire a Bossk, IG-88 or Cad Bane to hunt down some wayward rebel scum. It turns out that our galaxy has its own underworld, but it is very different. here more of centaur dreams:

I think intergalactic space is as empty a place as possible. However, new work from the University of Sydney delves into what we might find if we can see what’s out there. And it turned out to be quite a lot. David Sweeney of the university is the lead author of a research paper in Monthly Notices of the Royal Astronomical Society. The researchers discuss what they describe as the “galactic underworld,” which is made up of the compact remnants of massive stars. In other words, stars that have collapsed in on themselves and produced neutron stars and black holes.

Remember that black holes and neutron stars are made up of stars more than eight times the size of our sun. If the mass of the Sun is less than 25 times, then the star forms a neutron star, whose small ball is jammed with neutrons, which the pressure of neutron decay prevents from collapsing further. Sweeney and his team say that thirty percent of the black holes and neutron stars found there are completely out of the galaxy. Given the galaxy’s age, more than 13 billion years, an enormous number of these objects must have formed, and 30 percent were ejected by the “kick” resulting from their formation in a supernova.

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