/u/RichaPriyadarshi on I am Jeff Hoffman, MIT Professor of Aerospace Engineering and former NASA Astronaut. Ask Me Anything!19 Feb 2015, 17:54 UTC
Hello Sir, Isn't it taking just way too long for a man mission to a planet like first moon mission was in 1969 and since then we've so high expectation and have failed our deadlines so many times. So what do you think we're lacking in resources or knowledge. Because we're not even giving a try!