So the next question is: When can we use it?
Now a team of astronomers has mapped the bubble, revealing not just a strange asymmetry in the pocket's shape and temperature gradient, but the presence of a mysterious tunnel pointing towards the constellation Centaurus.
[...]
It could also be a clue that the galaxy consists of a whole connected network of hot bubbles and interstellar tunnels, an idea proposed in 1974, and for which little evidence has yet emerged. We might be on the brink of finding that network now – and this, in turn, could help us learn more about the recent history of our galaxy.
Mysterious 'Interstellar Tunnel' Found in Our Local Pocket of Space
The Solar System's little pocket of the Milky Way is, interestingly enough, exactly that.
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