The material discusses the establishing colonies of humans to live in asteroids. While the reading claims that this colonization would the best options because of many reasons, the listening disagrees and says that this idea is not practical and has serious challenges.
First, the author mentions that asteroids' low gravity makes landing a spaceship safer than landing on the Mars or Moon. On the other hand, the professor opposes this and points out that low gravity of asteroids has certain risks. The lecturer explains that it cause lossing of muscles' mass and reducing bones density. Furthermore, the speaker adds that humans who stay for short-time in a sapcecraft suffer from these consequenses, so there will be a severe health risk on muscles and bones from the long-term colonozation.
Second, the reading says that colonization on asteroids will be profitable given that they are rich in valuble metals. On the contrary, the lecturer refutes this and posits that this in not the whole picture. the professor states that the cost that should pay to support colonization on asteroids will cut down this profit from precious metals. Moreover, the speaker contends that increase the supply of these valuable metals to the Earth will lower their prices and reduce their profit.
Third, the author says that asteroids are easy to be reached because some of them periodically come very close to the Earth. Conversely, the listening contradicts this and mentions that asteroids may be easy to reach but not easy to return back. The professor explains that some asteroids come closer to the Earth than the Moon, then they move far away to a distance farher than The Mars. The lecturer states that getting back from an asteroid that as far as Mars would be a challenge.
The material discusses the establishing colonies of humans to
live
in
asteroids
. While the reading claims that this colonization would the best options
because
of
many
reasons, the listening disagrees and says that this
idea
is not practical and has serious challenges.
First
, the author mentions that asteroids' low gravity
makes
landing a spaceship safer than landing on the Mars or Moon.
On the other hand
, the professor opposes this and points out that low gravity of
asteroids
has certain
risks
. The lecturer
explains
that it cause
lossing
of muscles' mass and reducing bones density.
Furthermore
, the speaker
adds
that humans who stay for short-time in a
sapcecraft
suffer from these
consequenses
,
so
there will be a severe health
risk
on muscles and bones from the long-term
colonozation
.
Second, the reading says that colonization on
asteroids
will be profitable
given
that they are rich in
valuble
metals.
On the contrary
, the lecturer refutes this and posits that this in not the whole picture.
the
professor states that the cost that should pay to support colonization on
asteroids
will
cut
down this profit from precious metals.
Moreover
, the speaker contends that increase the supply of these valuable metals to the Earth will lower their prices and
reduce
their profit.
Third, the author says that
asteroids
are easy to
be reached
because
some
of them
periodically
come
very
close to the Earth.
Conversely
, the listening contradicts this and mentions that
asteroids
may be easy to reach
but
not easy to
return back
. The professor
explains
that
some
asteroids
come
closer to the Earth than the Moon, then they
move
far away to a distance
farher
than The Mars. The lecturer states that getting back from an
asteroid
that as far as Mars would be a challenge.