First,
launch
the
video
below.
Then,
close
the
video
window
and
answer
the
questions
that
follow.
You
can
watch
the
video
again
at
any
point.
COLLISIONS
AND
MERGERS
v
PartA
Consider
the
first
image
shown
in
the
video,
which
is
the
Hubble
Extreme
Deep
Field.
Which
of
the
following
statements
about
this
image
are
true?
Select
all
the
true
statements.
The
galaxies
in
this
image
are
part
of a
large
galaxy
cluster,
bound
together
by
gravity.
The
image
includes galaxies
that
are
elliptical,
spiral,
and
irregular.
Careful
study
of
the
image
shows
that
all
present-day
galaxies
are
spirals.
|
We
see
the
more
distant
galaxies
as
they
were
when
they
were
quite
young.
Careful
study
of
the
image
shows
that
the
youngest
galaxies
were
mostly
irregular
in
shape.
Previous
Answers
v
Correct
As
discussed
in
the
video,
we
see
more
distant
galaxies
as
they
were
when
they
were
younger,
which
is
what
allows
us
to
use
this
image
to
contruct
the
family
ablum
of
galaxies
also
shown
in
the
video.
The
image
shows
galaxies
of
all
types,
but
most
galaxies
are
irregular.
The
present-day
universe
has
galaxies
of
all
three
types:
elliptical,
spiral,
and
irregular.
