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Celestron C4.5 User Manual

Celestron C4.5
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a
ASS
Finding
the
Pole
In
each
hemisphere,
there
is
a
point
in
the
sky
around
which
all
the
other
stars
appear
to
rotate.
These
points
are
called
the
celestial
poles
and
are
named
for
the
hemisphere
in
which
they
reside.
For
example,
in
the
north-
ern
hemisphere
all
stars
move
around
the
north
celestial
pole.
When
the
telescope's
polar
axis
is
pointed
at
the
celestial
pole,
it
is
parallel
to
the
Earth’s
rotational
axis.
Many
methods
of
polar
alignment
require
that
you
know
how
to
find
the
celestial
pole
by
identifying
stars
in
the
area.
For
those
in
the
northern
hemisphere,
finding
the
celestial
pole
is
not
too
difficult.
Fortunately,
we
have
a
naked
eye
star
less
than
a
degree
away.
This
star,
Polaris,
is
the
end
star
in
the
handle
of
the
Little
Dipper.
Since
the
Little
Dipper
(technically
called
Ursa
Minor)
is
not
one
of
the
brightest
constellations
in
the
sky,
it
may
`
be
difficult
to
locate
from
urban
areas.
If
this
is
the
case,
use
the
two
end
stars
in
the
bow]
of
the
Big
Dipper
(the
pointer
stars).
Draw
an
imaginary
line
through
them
toward
the
Little
Dipper.
They
point
to
Polaris
(see
figure
5-5).
The
position
of
the
Big
Dipper
changes
during
the
year
and
throughout
i
*
the
course
of
the
night
(see
figure
5-4).
When
the
Big
Dipper
is
low
in
the
Figure
5-4
sky
(i.e.,
near
the
horizon),
it
may
be
difficult
to
locate.
During
these
times,
look
for
Cassiopeia
(see
figure
5-5).
The
position
of
the
Big
ao
veut
Observers
in
the
southern
hemisphere
are
not
as
fortunate
as
those
in
the
and
throughout
the
northern
hemisphere.
The
stars
around
the
south
celestial
pole
are
not
night.
This
is
due
to
nearly
as
bright
as
those
around
the
north.
The
closest
star
that
is
relatively
the
Earth's
motion
bright
is
Sigma
Octantis.
This
star
is
just
within
naked
eye
limit
(magnitude
around
the
Sun
and
the
5.5)
and
lies
about
59
arc
minutes
from
the
pole.
For
more
information
about
Earth's
rotation
on
its
stars
around
the
south
celestial
pole,
please
consult
a
star
atlas.
axis.
NE
ME
Sm
EE
Figure
5-5
The
two
stars
in
the
front
of
the
bowl
of
the
Big
Dipper
point
to
Polaris
which
is
less
than
one
degree
from
the
true
(north)
celestial
pole.
Cas-
siopeia,
the
"W"
shaped
constellation
is
on
the
opposite
side
of
the
pole
from
the
Big
Dipper.
The
North
Celestial
Pole
(N.C.P.)
is
marked
by
the
“+”
sign.
28
>
Astronomy
Basics

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Celestron C4.5 Specifications

General IconGeneral
BrandCelestron
ModelC4.5
CategoryTelescope
LanguageEnglish

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