Pluto
–
the
Mysterious
Dwarf
Planet Pluto
was
discovered
in
1930
by
an
American
astronomer
named
Clyde
Tombaugh.
It
is
located
in
the
Kuiper
Belt,
which
is
a
region
beyond
Neptune
that
is
filled
with
icy
objects.
Pluto
is
a
dwarf
planet
that
is
smaller
than
seven
of
the
moons
in
our
solar
system
and
has
a
highly
elliptical 『推荐更多 周公解梦常识请关注 :99星座知识网,wWW.ALm99.coM］）
orbit
around
the
sun.
Its
surface
is
covered
in
frozen
nitrogen
and
methane,
and
it
has
five
known
moons. Pluto
was
once
considered
the
ninth
planet
in
our
solar
system
until
2006
when
it
was
reclassified
as
a
dwarf
planet.
This
decision
was
made
by
the
International
Astronomical
Union
due
to
its
size
and
its
location
in
the
Kuiper
Belt.
Despite
its
reclassification,
Pluto
remains
a
fascinating
object
for
astronomers
to
study. One
of
the
biggest
mysteries
about
Pluto
is
its
interior.
Scientists
are
unsure
if
it
has
a
solid
or
liquid
core,
and
if
it
has
a
magnetic
field.
Its
tenuous
atmosphere,
which
is
primarily
composed
of
nitrogen,
methane,
and
carbon
monoxide,
is
another
area
of
interest
for
astronomers.
They
are
studying
how
the
atmosphere
is
affected
by
the
planet's
distance
from
the
sun
and
its
highly
elliptical
orbit. Pluto's
moons
are
another
area
of
study.
The
largest
moon,
Charon,
is
nearly
half
the
size
of
Pluto
and
is
so
close
that
they
orbit
each
other
like
a
binary
system.
The
other
four
known
moons
–
Nix,
Hydra,
Kerberos,
and
Styx
–
are
much
smaller
and
have
irregular
shapes.
Studying
the
moons
can
provide
insight
into
the
formation
and
evolution
of
the
Pluto
system. In
2015,
NASA's
New
Horizons
mission
flew
by
Pluto
and
provided
the
first
close-up
images
of
the
planet
and
its
moons.
The
images
revealed
a
complex
terrain
with
mountains
and
valleys,
as
well
as
a
heart-shaped
region
called
Tombaugh
Regio.
The
mission
also
discovered
a
haze
layer
in
Pluto's
atmosphere
that
extends
more
than
100
miles
above
its
surface. In
conclusion,
Pluto
remains
a
mysterious
and
fascinating
object
for
astronomers
to
study,
even
after
its
reclassification
as
a
dwarf
planet.
Its
interior,
atmosphere,
and
moons
are
all
areas
of
interest
for
researchers.
As
more
data
is
collected,
we
may
discover
even
more
about
this
intriguing
dwarf
planet
and
its
place
in
our
solar
system.