Why haven't we had a manned mission to Venus or Mars yet

Dr. Werner Von Braun, the rocket scientist who put us on the Moon in 1969, said at that time that if present funding were to continue, he could have men on Mars by 1980. However, funding did not continue and president Richard Nixon shut the program down. It is all a matter of funding. Please read the excellent book, "The Case for Mars" now in a new edition, by Dr. Robert Zubrin, PhD, available on amazon and other places. It is an excellent read.

The main obstacle with going to Mars is the launch window, which opens only every 2 years. So an astronaut would have to spend about 6 months on the way to Mars via a Hohmann transfer, another year on Mars itself, and another 6 months back. Hollywood movies that show astronauts going to Mars and then immediately back again are therefore inaccurate. It's not like a "simple" trip to the moon that takes about a week. NASA actually developed a plan for going to Mars, which they called the (surprise) "Mars Plan", but like most everything else there were budget problems.

Venus is out of the question. The heat and pressure is far too extreme. You can't even launch a rocket from Venus because the surface pressure would render the dynamic pressure that rocket exhaust produces useless.

1) We will NEVER be able to have a manned mission to Venus. It's conditions are too unstable and the atmosphere is dangerous even with spacesuits on.

2) We don't have any idea on how to complete a manned mission to mars, it's millions of miles away and we have to figure out how we'll get there without running out of fuel on the way there and the way back.

Maybe we will figure out a way to send men to mars in the near future(:

Why have you posted a useless question every 3 minutes for the past hour and a half? It seems we are the people who are doing your homework. Flooding is like calling the police for some dumb reason. This is a waste of valuable time that could be spent on other serious questions.

If you use yahoo answers for your homework, how do you expect to be a rationally thinking individual when you reach aunthood? It's as if you want to remain ignorant to science.

There is nothing on either Venus or Mars to justify the extremely high expense of the mission and likely death of the voyagers. Certain death in the case of Venus.

Venus is out. will never happen. It's atmosphere is deadly.

Mars: maybe in the future. Right now NO MONEY.