Definitions from Wiktionary (Local Bubble)
▸ noun: (astronomy) A cavity in the interstellar medium of the Orion Arm of the Milky Way estimated to be around 1,000 light years in diameter, with the Solar System sitting close to its centre; likely to be the result of a supernova which exploded in the last ten to twenty million years.
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▸ noun: (astronomy) A cavity in the interstellar medium of the Orion Arm of the Milky Way estimated to be around 1,000 light years in diameter, with the Solar System sitting close to its centre; likely to be the result of a supernova which exploded in the last ten to twenty million years.
Similar:
superbubble,
Fermi bubble,
warp bubble,
Hubble sphere,
warm-hot intergalactic medium,
active galactic nucleus,
minisuperspace,
Hubble volume,
active galaxy,
bulk,
more...
Opposite:
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