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H II region
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Physics
Subfields of physics
Astrophysics
Space plasmas
Nebulae
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An
H II region
is
a
large cloud of
gas
and dust in
space
that is ionized by the
radiation
from young, hot
stars
. The term "
H
II" refers to the presence of
hydrogen
ions
(
protons
) in the region.
Ancestors
(6)
Nebulae
Space plasmas
Astrophysics
Subfields of physics
Physics
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