In an op-ed on AOLNews.com, Buzz Aldrin, the famous Apollo 11 astronaut, lays out a rather simple plan for sending humans to Mars by 2019: extend the shuttles by three or four missions then use commercial firms to carry crew and cargo to the space station while NASA builds a prototype spacecraft called the Exploration Module, or XM.

The prototype of this craft, which would operate only in space, could be built using excess modules and parts left over from constructing the station itself. Brought up as cargo aboard the space shuttle--which I also propose we keep flying for several additional missions and not retire it as NASA is planning to do--the XM would be docked to the station and outfitted by astronauts.

Once a rocket engine is attached to the prototype XM, we could take it out for a spin, cycling between the station and the moon. The XM wouldn't land on the moon but conduct a flyby, like the Apollo 13 mission did back in 1970.

Aldrin has been a proponent of scraping plans for returning to the moon, and instead focusing on Mars. He even called the new plan for NASA proposed by the Obama administration the president's "JFK moment."

Aldrin also says in his op-ed that his plan, which he calls a "unified space vision", would keep NASA in the human spaceflight business. Many congressional members, for example, have voiced strong concerns that the administration's new plan would threaten America's leadership, and the very existence of the U.S. human spaceflight program.

By building a deep-space craft, NASA can use much of their engineering know-how and put a form to Charlie Bolden's Mars mission dream. It allows the commercial folks their unfettered access to the station, as President Obama proposes. And it recommits America to leadership in space by aiming at Mars, using parts and equipment already paid for by the taxpayers.

On Monday, the Obama administration announced its 2010 budget for NASA. It cancels plans to return to the moon by 2020 and focuses on using commercial companies to ferry astronauts to and from orbit.

While some are up in arms over the future of human spaceflight, Buzz Aldrin is backing the president in an editorial in The Huffington Post.

Aldrin calls Obama's decision his "JFK moment." He praises the president for deciding "to redirect our nation's space policy away from the foolish and underfunded Moon race that has consumed NASA for more than six years, aiming instead at boosting the agency's budget by more than $1 billion more per year over the next five years, topping off at $100 billion for NASA between now and 2015."

Aldrin has been far from shy about criticizing the Constellation program, previously calling the launch of its prototype rocket, Ares I-X, "fake" and "a little more than a half-a-billion dollar political show." He thinks that NASA should be spending taxpayer dollars on developing technology for trips to Mars, and he backs a "flexible path" plan that would "redirect NASA towards developing the capability of voyaging to more distant locations in space, such as rendezvous with possibly threatening asteroids, or comets, or even flying by Mars to land on its moons."

NASA's administrator, Charles Bolden, said in a press conference Tuesday that he and senior White House officials will spend the next few months devising a new overarching goal for NASA, and a schedule for developing technologies to send astronauts to destinations as yet unknown.

But Obama's budget proposal still has to be approved by congress. "My biggest fear is that this amounts to a slow death of our nation's human space flight program," Representative Bill Posey, Republican of Florida, said in a statement.

The launch of NASA's new rocket, Ares I-X, on October 28 was the first test flight of a new launch vehicle since the Apollo missions. The flight was spectacular and historic, but the famous Apollo 11 astronaut Buzz Aldrin says it was little more than a half-a-billion dollar political show.

In an editorial in The Huffington Post, Aldrin calls the rocket for "fake", because the Ares I-X was a prototype rocket built to look like the rocket designed to replace the aging space shuttles and take humans to the moon and beyond, Ares I. For example, its four-segment solid rocket boosters were taken from the space shuttle and the fifth segment was a mock, made of steel cylinders. The rocket's upper stage was also a mock-up (the final will include the J-2X engine and Orion crew capsule), but it used real parachutes for recovery of the boosters. The Ares I-X flight objectives were to gather data during the first two minutes of ascent, when the rocket is most likely to fail, to help engineers better design and development the Ares I.

Aldrin writes that technical problems have "haunted the Ares like leftovers from Halloween," and says that, "to stave off critics, three years ago the Project Constellation managers conceived of the 1-X flight to supposedly show some progress."

The concept of the Ares I-X flight, however, mirrors the development of the Saturn family of rockets that carried the astronauts, Aldrin included, to the moon. During the development of Saturn IB, for example, many test flights were conducted when different segments and parts of the rocket were engineered.

NASA's current plan is to use two rockets to return humans to the moon--Ares I for crew and Ares V as a heavy lifter, carrying things like a lunar habitat. Aldrin notes that it took just one rocket during the Apollo missions, and says that two rockets in development means "two price tags. Two ways for failure to occur. Or delays to develop."

Worse yet, neither rocket alone can accomplish a deep space mission. And deep space, such as Mars is, as our friends in the recent Augustine report stated, our destination in space . . . Ares 1 is too small, barely able to lift the crew space capsule. And Ares V is too weak to boost all of the elements together.

What do we need? One rocket for all our deep space missions. Save the taxpayer's money by canceling the Ares 1 and V. And go "back to the future" in designing the big beast.

Fortunately, Aldrin has a plan: use the commercial sector for transportation to the space station--which would save money--and start building a heavy lifter "worthy of Saturn V's successor." He says the moon should be an international affair, opening up the design competition outside of just NASA, and our efforts should be on Mars.

If we bypass a foolish Moon race . . . we will have time to refine the super booster to make sure it is compatible with our deep space goals, like missions flying by comets or asteroids -- or to the moons of Mars. Such a rocket would be ready when the time comes to colonize Mars. No more false starts and dead end rockets.

One thing the Augustine Panel's final report pointed out is that we should be building infrastructure in space, such as refueling technology, so that rockets that are smaller and cheaper could be used for missions that would otherwise be outside their weight class and larger rockets would have their capabilities enhanced.

The decision is still out on what the next U.S. rocket for space travel will be, but whatever it is (and Aldrin confesses he has his own design), he says, "heavy lifting doesn't have to be heavy spending, if we do the right job."