The trip from March to March could be officially dead. That is to say that the agency does not seem likely to land an astronaut on the red planet in the 2030s and the associate administrator of NASA for Human Exploration, William H.
Gerstenmaier said recently that NASA does not fund a mission in March with the current schedule.
Gerstenmaier also addressed the underlying problem: the agency simply did not land on something as heavy as a machine equipped on Mars.
“I can not put a date on humans on Mars, and the reason is really the other part is, the budget levels we have described, this increase of about two percent, we do not have the surface systems available for Mars, “Gerstenmaier told a meeting of the American Institute of Aeronautics and Astronautics.
“And this entrance, descent and landing is a great challenge for us to Mars.”
The missions to Mars have a failure rate as high as in 1997, journalist and historian Donald Neff Lloyd assumed in Time magazine that there must be a large galactic hall Ghoul Mars disappears in a human spaceship.
In fact, 16 attempts to land on Mars since 1970, only 7 were successful, all led by the NASA Propulsion Laboratory. The European Space Agency has crushed a potential enemy to Mars in October last year.
In April, Popular Mechanics spoke with a member of NASA’s Transition Team and UC Astrophysics Professor Jack Burns, who said that because of the landing challenges, “I think it’s going to last a little over the decade Of 2030 before we can land astronauts on Mars  without problems. ”
The problem, says Burns, is that the atmosphere on Mars is as bad as possible for the landing of the spacecraft. Mars has an atmospheric pressure of less than one percent of Earth’s atmosphere.
It is thick enough that a heavy heat shield composed of titanium or composite material is needed to prevent the spaceship from burning at the entrance.
However, the atmosphere is too thin to slow enough to land using only the parachutes.
In the past, NASA uses parachutes to slow down as much as possible and let the spacecraft crashing onto the planet with enough inflated airbags to bounce off the surface of Mars – this is how the agency got the roadster opportunity.
The most sophisticated landing on Mars, however, was the so-called “aerial crane” used to deposit the Curiosity rover to the surface.
The aerial crane system includes a standard capsule with a thermal shield and a parachute. Once the capsule has decelerated enough to avoid a significant discharge of friction, it threw the heavy heat shield.
Then, as the ship approached the surface of the red planet, still in free fall, curiosity, attached to the sky crane, launched the capsule and the parachute.
The sky from the crane and then fires back down for the rest of the way, and when it sits just above the surface, it has reduced the curiosity of a cable.
Curiosity as it moved slowly on the floor of Mars, the sky crane attacked rockets and flew to affect the planet also the complete work.