This is a national Geographic Award Winning Video - watch
This is a national Geographic Award Winning Video - watch
"We're still looking at human exploration of Mars as one of the goals of the future at the top level," said NASA researcher Bret Drake with Lunar and Mars Integration at Johnson Space Center in Houston. "Having a human actually set foot on another planet would be one of the greatest adventures possible, one of the greatest monuments to history."
A crewed mission to the red planet is a daunting challenge that lies at the edge of current technological capabilities and possibly beyond. Still, NASA keeps a strategy to go there and constantly keeps up to date with new ideas.
"Mars is one of those targets of fascination that has been around a long time," Drake said.
How to get there
A voyage to Mars would take a crew about 180 days. So far NASA is exploring two options for propulsion there — a nuclear thermal rocket and a chemical engine.
A nuclear thermal rocket, would use a nuclear reactor to super-heat a gas and blast it out the nozzle to generate thrust. "It's a very high-performance vehicle, and we think it's very safe, not radioactive at launch, but it is a nuclear system," Drake said. "The idea for the chemical engine is similar to that used on the space shuttle, liquid oxygen and liquid hydrogen. It's a fairly well-known technology, but it's not as efficient as nuclear thermal."
To reach the Martian surface, NASA envisions an aerodynamic lander that flies down with thrusters to help it descend. The ascent vehicle that takes the crew back into space for the six-month trip home will likely rely on a combination of methane and liquid oxygen. "Oxygen is present in the Martian atmosphere in the carbon dioxide, so you can use resources on Mars to make it," Drake said.
Before the crew even gets to Mars, the plan is to send as much cargo there ahead of time as possible. "That way we can know it's operating right before we ever commit the crew," Drake said. "A Mars mission is not like a lunar mission where you can come home at any time — once they're committed, a crew is out there for years."
The very habitat the crew stays at on the Martian surface would be sent ahead of time. "You can also do things like produce and store oxygen from resources at Mars beforehand for the crew and the ascent vehicle. You could generate water as well."
Big crew, long stay
NASA envisions a crew of six astronauts for a Mars mission. "That's about what's required for the skills needed — a commander, scientist, engineer, medical officer, things like that, as well as cross-training," Drake said. "They'll need expertise in a wide range of disciplines."
Currently NASA envisions a long stay for a crew at Mars, about 500 days.
"Crew autonomy is vital, because there's an up to 40 minute time delay in communication between Earth and the crew because of the distance," Drake said. "And the crew doesn't have a capability for re-supply — they'll just have what they send ahead or what they bring with them — so when things fail, they'll have to be able to repair them. They must be self-sufficient."
To survive the voyage, air and water need to be completely recycled regularly.
"We're learning a lot on the International Space Station right now on air revitalization and water recovery," Drake said. "What's nice about Mars is that there's carbon dioxide in the atmosphere, so that can help get us oxygen and water for the crew. In terms of food, we're looking at smaller systems, 'salad machines,' to grow food for the crew. Fresh food is not only good for nutrition, but good for the mind as well. A fresh tomato can really boost psychology."
Mental and physical challenges
The long hardship of roughly two-and-a-half years in space with only a few people in a potentially lethal environment will undoubtedly challenge the psyches of Mars explorers.
"The Russians are conducting a test right now that hopefully will shed light on the behavioral sciences aspect of a Mars mission," Drake said. "Looking at other remote exploration endeavors is helpful as well — Antarctica, or submarines — all that feeds into the human behavioral aspects of crew selection."
A key concern for astronauts as well as during the stay on Mars is dangerous radiation in the form of storms of high-energy particles from the sun as well as cosmic rays from deep space. "The best radiation protection material is hydrogen, or water, which is rich in hydrogen," Drake said.
On the surface of Mars, NASA envisions that cargo deployed ahead of time can produce water before the crew arrives to use as a shield during the crew's stay there. On the way to and from Mars, the ship could be configured so that water and food surround areas where crew spend most of their time, but "a 'storm shelter' aboard the ship will be an integral part for short events of radiation that can be lethal," Drake said.
"It's humanity's next step to understanding and expanding our presence outward," Drake said. "We view human exploration of Mars as being an international endeavor, most likely not limited to just one country, but probably of global scale.
The last time Rachel Veitch bought a car, gas cost 39 cents per gallon, Lyndon B. Johnson was in the White House and "The Little Old Lady From Pasadena" was a hit song on the radio. Nearly 600,000 miles later, the 90-year-old Florida woman still drives her 1964 Mercury Comet Caliente every day.
Go, Granny, Go.
Veitch, of Orlando, credits her meticulous care and near-obsessive dedication to her car -- she calls it "Chariot" -- as the reason it's still turning over every morning, year after year after year. The retired nurse maintains an exhaustive collection of maintenance records and changes the oil every 3,000 miles.
"When I buy gas, I write down the mileage, the date and how many miles per gallon I got," Veitch told FOXNews.com. "I've never been a destructive person and I've just taken care of everything, except my husbands."
Veitch, a mother of four, bought "Chariot" in February 1964 from a dealer in Sanford, Fla., for $3,289. The car has outlasted her three marriages and has gone through eight mufflers, at least 17 batteries and three sets of shocks. Its odometer recently clicked 559,000 miles.
"My Chariot has never lied to me or cheated on me and I can always depend on her," Veitch said. "My last husband and I divorced in 1975 and he took the 1972 Pontiac we had and I kept Chariot. I'll bet he's traded cars half a dozen times by now and I still have my Chariot, my faithful pal."
Veitch said the classic car — which boasts automatic transmission, frosty air conditioning and a "lousy" 15 miles per gallon — has been featured in several car shows across the country and took her all the way to Pennsylvania in 2007 for her 70th high school reunion. Classmates and neighbors alike are sick of the same old story, she said. "People don't want to talk to me anymore," Veitch said. "They're tired of hearing about my Chariot."
Veitch's dream car saw its lone renovation about 12 years ago, after she got a speeding ticket for going 92 mph in a 55 mph zone. "After that, I put in cruise control," she said. "You can't hold her down, she's a feisty old girl." The car also survived a rear-end collision while Veitch drove along I-95 in Georgia in 1980. She was not injured.
Classic car experts say the 1964 Mercury Comet Caliente would likely sell for about $3,000 in mint condition, or up to $12,000 if it was restored to new. But Veitch says she'll never sell, and she packs a .38-caliber handgun in case anyone tries to take her chariot for a ride without her. "Somebody's going to go down with me if I get in that situation," Veitch said. "I'm not going down alone." Veitch, who will turn 91 next month, said she last renewed her driver's license in 2003 and scoffed when officials told her she did not have to take another driving test. "I said, 'This is ridiculous, you should be testing me," she said. "It's a lot of baloney."
With any luck, Veitch said, "Chariot" will end up in the Henry Ford Museum in Dearborn, Mich., a testament to a woman who cared for a single car for 45 years.
Asked if she considered trading in her car under President Obama's "Cash for Clunkers" program, which gives $4,500 to motorists who trade in older cars with poor gas mileage, Veitch replied: "He ain't gonna get mine. I'll die fighting for her."