After
having
suspected
it
for
more
than
____________________
decade
,
for
____________________
first
time
,
scientists
have
found
evidence
that
____________________
most
energetic
particles
are
generated
outside
____________________
Milky
Way
.
Those
responsible
for
this
discovery
have
been
____________________
astronomers
of
____________________
Pierre
Auger
Observatory
in
Argentina
,
who
are
very
satisfied
to
have
checked
____________________
hypothesis
.
Although
____________________
study
has
not
been
able
to
identify
the
concrete
sources
of
cosmic
rays
or
how
they
reach
such
high
levels
of
energy
,
analyzes
performed
over
____________________
period
of
twelve
years
"
have
finally
revealed
that
particles
with
____________________
upper
ranges
of
energy
have
____________________
extragalactic
origin
,
"
says
Alan
Watson
,
founder
astronomer
of
____________________
observatory
.