The greatest invention by man after Fire and Wheel would perhaps be the invention of Flight by Wright brothers for which they are greatly remembered.
What standards of greatness are you using? I can think of many inventions, especially pertaining to electricity and communication, that are more useful and less reckless than flight. Flight is scary! Anyway, I wanted to criticize your assertion that flight is one of the greatest inventions. You should probably rephrase that or substantiate it somehow.
I would certainly not like to be counted among the billions stars whose light never reaches Earth but rather be the Sun who shines upon us everyday.----This sentence needs to be followed by some explanation. It is about a desire to make an impact on the world (no plane crash pun intended, but I still maintain that flight is scary), but that is not what this paragraph is about. The paragraph is about the significance of flight... so add a sentence to connect this idea with the idea about the significance of flight.
Efficient use of words:
The place where i live My home is quite close to the airport.
I see the planes take off and land all the time. Every time i
witness a plane land or take off i am very curious to know the science behind the act.------use only the number of words necessary to make your point and give the reader a rhythmic experience.
This is a great part of the essay: further my knowledge in the development of advanced space vehicles and gravity escaping propulsion systems that would consume less power.---I wish you would discuss this goal a little more. It is a great aspiration.
:-)