NASA has invested $725,000 in a new rocket system that could solve one of the major obstacles standing in our way of sending humans to Mars: travel time.
With current technology, a round-trip to the red planet
would take almost two years. For astronauts, spending that much time in
spaceflight comes with big health risks.
They'd be exposed to high levels of solar and cosmic
radiation, the harmful effects of zero-gravity, and a long period of isolation.
Space radiation is arguably the biggest threat. Astronauts
who spend just six months in space are exposed to roughly the same amount of
radiation as 1,000 chest X-rays, and this puts them at risk for cancer, nervous
system damage, bone loss, and heart disease, according to NASA.
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The Pulsed Plasma Rocket. (Howe Industries) |
The best way to reduce radiation exposure and other harmful
health effects is to shorten the length of the trip, Troy Howe, president of
Howe Industries, told.
That's why he's teamed up with NASA to develop the Pulsed
Plasma Rocket (PPR): a new rocket system that could shorten a round-trip to
Mars to just two months.
This technology "holds the potential to revolutionize
space exploration," NASA wrote in a statement, and could one day take
humans even further than Mars.
How a rocket could get us to Mars and back in 2 months
The PPR is a propulsion system that uses pulses of
superheated plasma to generate a lot of thrust very efficiently. It's currently
in phase two of development, funded by the NASA Innovative Advanced Concepts
(NIAC) Program.
This phase two study is scheduled to begin this month, and
is focused on optimizing the engine design, performing proof-of-concept
experiments, and designing a PPR-powered, shielded spaceship for human missions
to Mars.
The big advantage of the PPR is that it can make a
spacecraft go really, really fast. It has both a high thrust and high specific
impulse. Specific impulse is how quickly a rocket engine generates thrust, and
thrust is the force that moves the spacecraft along.
The PPR generates 10,000 newtons of thrust at a specific
impulse of 5,000 seconds. That means a PPR-equipped spacecraft carrying four to
six passengers could travel roughly 100,000 miles per hour, Howe told BI over
email.
A spacecraft flying that fast would eventually have to slow
down to reach its destination. Howe said the company has accounted for the
additional energy and propellant this would require to land on Mars.
Even after phase two is complete, it will still be about a
couple of decades before the PPR is ready to blast astronauts off to the red
planet.
But once it's available for spaceflight, Howe hopes that
this technology will significantly expand the range of human space exploration,
perhaps even aiding missions to Pluto one day.
"You can pretty much achieve anything you want in the
solar system once we get this technology running in 20 years," he said.