The reading passage claims that scholars are investigating a project sending humans to the mars as well as the moon. But it may create some problems owing to the fact that it is far away than the moon and the project might be impossible at this time. However, the lecturer finds all the ideas dubious and presents some evidence to refute them all.
First, the author embraces the idea that mission to the mars will take two years and supply foods, water, and oxygen is a hard task to do in comparison with the moon mission. In contrast, the lecturer underlines the idea that astronauts can rely on hydroponics. In fact, they can grow some plants in water, which require less space. In this way, not only can they recycle wastewater and drink it but also can use from oxygen released by these plants.
The author also asserts that astronauts on Mars are in the zero-gravity environment of space and it might create some deleterious effects on their bodies, muscle mass, and bone density. On the contrary, the professor brings up the idea that many astronauts spend more time on some space stations and they use several techniques to cope with this situation like regular exercises.
Finally, as set forth by the author space radiations emitted by the sun also might have negative effects on astronauts because there is no magnetic shield to protect astronauts like the shield preserve people on the earth. Conversely, the speaker dismisses this issue due to the fact that these radiations are not dangerous all the time. In fact, they put people's health into danger occasionally. Also, space crafts could be equipped with special instruments. That being so, astronauts can stay in shielded areas in time where the radiations are severe.
The reading passage claims that scholars are investigating a project sending humans to the
mars
as well
as the moon.
But
it may create
some
problems owing to the
fact
that it is far
away
than the moon and the project might be impossible at this
time
.
However
, the lecturer finds all the
ideas
dubious and presents
some
evidence to refute them all.
First
, the author embraces the
idea
that mission to the
mars
will take two years and supply foods, water, and oxygen is a
hard
task to do
in comparison
with the moon mission.
In contrast
, the lecturer underlines the
idea
that
astronauts
can rely on hydroponics. In
fact
, they can grow
some
plants in water, which require less
space
.
In
this way, not
only
can they recycle wastewater and drink it
but
also
can
use
from oxygen released by these plants.
The author
also
asserts that
astronauts
on Mars are in the zero-gravity environment of
space
and it might create
some
deleterious effects on their bodies, muscle mass, and bone density.
On the contrary
, the professor brings up the
idea
that
many
astronauts
spend more
time
on
some
space
stations and
they
use
several techniques to cope with this situation like regular exercises.
Finally
, as set forth by the author
space
radiations emitted by the sun
also
might have
negative
effects on
astronauts
because
there is no magnetic shield to protect
astronauts
like the shield preserve
people
on the earth.
Conversely
, the speaker dismisses this issue due to the
fact
that these radiations are not
dangerous
all the
time
. In
fact
, they put
people
's health into
danger
occasionally
.
Also
,
space
crafts could
be equipped
with special instruments. That being
so
,
astronauts
can stay in shielded areas in
time where
the radiations are severe.