Comet,
a
fascinating
and
mysterious
natural
phenomenon
that
has
captivated
humans
for
centuries.
Also
known
as
a
"dirty
snowball,"
comets
are
made
up
of
ice
and
dust
that
originate
from
the
furthest
reaches
of
our
solar
system.
As
they
tr《阅读更多 12星座日期查询文章请关注 :星讯网,wWW.xIngXun.CC』）avel
closer
to
the
sun,
they
begin
to
heat
up,
causing
the
ice
to
vaporize
and
creating
a
beautiful,
glowing
tail. Comets
have
a
long
and
fascinating
history.
They
have
been
documented
by
ancient
civilizations
such
as
the
Chinese,
Babylonians,
and
Greeks.
In
fact,
the
word
"comet"
comes
from
the
Greek
word
"kometes,"
which
means
"long-haired
star." Comets
have
also
played
a
significant
role
in
scientific
discovery.
In
1705,
Sir
Edmond
Halley
predicted
the
return
of
a
comet
that
had
been
observed
in
1531
and
1607.
In
1758,
the
comet
returned
exactly
as
Halley
had
predicted,
and
it
has
since
been
named
Halley's
Comet
in
his
honor. Today,
comets
continue
to
fascinate
scientists
and
astronomers
alike.
NASA's
spacecraft,
Rosetta,
successfully
landed
on
a
comet
in
2014,
providing
scientists
with
invaluable
data
about
the
composition
of
comets
and
the
origin
of
our
solar
system. Comets
are
not
only
beautiful
and
mysterious,
but
they
also
provide
scientists
with
important
information
about
the
history
and
composition
of
our
solar
system.
As
we
continue
to
explore
and
learn
more
about
our
universe,
comets
will
undoubtedly
play
a
crucial
role
in
our
understanding
of
the
cosmos.