Why
can't
Thomasin.find
any
constellations
she
recognize?
-From
any
position
far
outside
the
Solar
System,
the
stars
are
seen
at
different
angles
and
fall
out
of
the
constellations'
traditional
shapes.
What
causes
the
long
tail
to
protrude
from
this
galaxy?
-Tidal
forces
....
Why
are
the
star
clusters
in
the
tidal
tail
blue?
-Blue
stars
in
these
newly
active
star-forming
regions
far
outshine
the
less
massive
red
stars.
Can
we
see
the
intruder
galaxy
in
the
image?
-Yes
Compared
to
spiral
galaxies,
elliptical
galaxies
have...
wsess
gas,
less
dust,
and
less
new
star
formation.
Among
spiral
galaxies,
an
SBa
has...
-}..a
bar,
tight
smooth
spiral
arms,
and
a
large
bulge.
What
is
the
difference
between
an EO
galaxy
and
an
E7
galaxy?
-E7=oval,
EO=circular
What
category
do
astronomers
use
if
a
galaxy
does
not
fit
into
the
spiral
or
elliptical
category?
-irregular
What
happens
to
the
planets
in
a
galaxy
when
that
galaxy
collides
with
another
galaxy?
-Nothing,
because
the
spaces
between
stellar
systems
in
a
galaxy
is
much
larger
than
their
size.
What
kind
of
galaxy
will
be
the
final
result
from
the
collision
of
the
Milky
Way
and
Andromeda
galaxies?
-a
large
elliptical
What
is
the
result
when
gas
clouds
from
both
of
the
colliding
galaxies
meet?
-The
clouds
crushing
down
on
each
other
starts
a
burst
of
new
star
formation.
Riddle
-
Spiral
What
are
the
3
parts
of
this
type
of
galaxy,
and
which
2
might
you
see
through
a
telescope?
-Disk,
bulge,
and
halo;
would
see
bulge
and
disk,
and
wouldn't
see
halo.
What
are the
"friends”
(i.e.
other
types
of
galaxies)
referred
to
in
the
Riddle?
