The reading states that privatizing space tourism will benefit both science and public and provides three reasons of support. The professor disagrees with the article and refutes each of author's reasons.
First, the reading claims that space flights will become a lot cheaper if they get privatized. The professor refutes the statement by explaining that private companies will need to have elaborate space traffic control in order to avoid collisions. He also mentions that safety is another issue. He says that spacecrafts require to be tested and re-tested which cost a lot of money. This is why professor does not believe the price would go down.
Second, the article avers that privatizing space traveling will accelerate the rate of discoveries. The lecturer opposes this statement by saying that this will cause delay or prevention of discoveries. He explains that private companies would hire the best and brightest scientists and engineers with high salaries for the space tourism and since space tourism does not have scientific value, this would cause problems for serious spacecrafts because they would not have as many expert staff.
Third, the reading states that privatizing space tourism would decrease financial burden for taxpayers. The professor refutes the reason by explaining that private space tourism is impossible without taxpayers' money. He says that spaceship and space stations need billions of dollars to be built and function and private companies will not be able to raise enough funds for that. He explains this will force taxpayers to pay even more tax to subsidize vacation of people who travel to space. 
The reading states that privatizing  
space
  tourism
 will benefit both science and public and provides three reasons of support. The  
professor
 disagrees with the article and refutes each of author's reasons. 
First
, the reading claims that  
space
 flights will become a lot cheaper if they  
get
 privatized. The  
professor
 refutes the statement by explaining that  
private
  companies
 will need to have elaborate  
space
 traffic control in order to avoid collisions. He  
also
 mentions that safety is another issue. He says that spacecrafts require to be  
tested
 and re- 
tested
 which cost  
a lot of
 money. This is why  
professor
 does not believe the price would go down.
Second, the article avers that privatizing  
space
 traveling will accelerate the rate of discoveries. The lecturer opposes this statement by saying that this will cause delay or prevention of discoveries. He  
explains
 that  
private
  companies
 would hire the best and brightest scientists and engineers with high salaries for the  
space
  tourism
 and since  
space
  tourism
 does not have scientific value, this would cause problems for serious spacecrafts  
because
 they would not have as  
many
 expert staff.
Third, the reading states that privatizing  
space
  tourism
 would decrease financial burden for taxpayers. The  
professor
 refutes the reason by explaining that  
private
  space
  tourism
 is impossible without taxpayers' money. He says that spaceship and  
space
 stations need billions of dollars to  
be built
 and function and  
private
  companies
 will not be able to raise  
enough
 funds for that. He  
explains
 this will force taxpayers to pay even more tax to subsidize vacation of  
people
 who travel to  
space
.