Hardrock69
09-24-2012, 04:34 AM
http://articles.orlandosentinel.com/2012-09-22/news/os-nasa-space-outpost-20120922_1_moon-rocks-space-launch-system-nasa-chief-charlie-bolden
WASHINGTON — Top NASA officials have picked a leading candidate for the agency's next major mission: construction of a new outpost that would send astronauts farther from Earth than at any time in history.
The so-called "gateway spacecraft" would hover in orbit on the far side of the moon, support a small astronaut crew and function as a staging area for future missions to the moon and Mars.
At 277,000 miles from Earth, the outpost would be far more remote than the current space station, which orbits a little more than 200 miles above Earth. The distance raises complex questions of how to protect astronauts from the radiation of deep space — and rescue them if something goes wrong.
NASA Chief Charlie Bolden briefed the White House earlier this month on details of the proposal, but it's unclear whether it has the administration's support. Of critical importance is the price tag, which would certainly run into the billions of dollars.
Documents obtained by the Orlando Sentinel show that NASA wants to build a small outpost — likely with parts left over from the $100 billion International Space Station — at what's known as the Earth-Moon Lagrange Point 2, a spot about 38,000 miles from the moon and 277,000 miles from Earth.
At that location, the combined gravities of the Earth and moon reach equilibrium, making it possible to "stick" an outpost there with minimal power required to keep it in place.
To get there, NASA would use the massive rocket and space capsule that it is developing as a successor to the retired space shuttle. A first flight of that rocket is planned for 2017, and construction of the outpost would begin two years later, according to NASA planning documents.
Potential missions include the study of nearby asteroids or dispatching robotic trips to the moon that would gather moon rocks and bring them back to astronauts at the outpost. The outpost also would lay the groundwork for more-ambitious trips to Mars' moons and even Mars itself, about 140 million miles away on average.
Placing a "spacecraft at the Earth-Moon Lagrange point beyond the moon as a test area for human access to deep space is the best near-term option to develop required flight experience and mitigate risk," concluded the NASA report.
From NASA's perspective, the outpost solves several problems.
It gives purpose to the Orion space capsule and the Space Launch System rocket, which are being developed at a cost of about $3 billion annually. It involves NASA's international partners, as blueprints for the outpost suggest using a Russian-built module and components from Italy. And the outpost would represent a baby step toward NASA's ultimate goal: human footprints on Mars.
But how the idea — and cost — play with President Barack Obama, Congress and the public remains a major question. The price tag is never mentioned in the NASA report.
Spending is being slashed across the federal government in the name of deficit reduction; it's unlikely that NASA in coming years can get more than its current budget of $17.7 billion — if that.
The planning documents indicate the outpost is possible only with "modest increases" to the current budget — and that presumes none of the cost overruns that have characterized recent NASA projects. Indeed, the first construction flight in 2019 is labeled "unfunded" in briefing charts, as is a robotic "sample return" moon mission in 2022.
One NASA supporter in Congress — U.S. Rep. Bill Posey, R-Rockledge — said he liked the idea. But he said it would require strong White House backing to convince Congress to finance it.
NASA funding "always has been very precarious," Posey said. "And money is going to get tighter."
The White House did not respond to a request for comment, and a NASA statement was noncommittal about the outpost.
"There are many options — and many routes — being discussed on our way to the Red Planet," said spokesman David Weaver. "In addition to the moon and an asteroid, other options may be considered as we look for ways to buy down risk — and make it easier — to get to Mars.
A second major concern is astronaut safety. It will take days to get to the outpost — the farthest NASA has flown humans since the moon missions of 40 years ago — making rescue and supply missions difficult. The planning documents are unclear on whether astronauts would be permanently stationed at the outpost or there part time.
Another concern is how NASA intends to address the dangers of deep space, especially radiation.
The outpost would be more vulnerable to space radiation because it would be largely beyond the protective shield of Earth's magnetic field, said scientists with the National Space Biomedical Research Institute.
"It is significantly more difficult to shield and protect their [astronauts'] health" at that location, said Jeff Chancellor, an NSBRI scientist.
These worries are not lost on NASA officials. The planning documents note that an outpost mission would require a "culture change" that includes the "acceptance of risk significantly different" from the shuttle program, which lost two crews in 1986 and 2003.
Still, the idea has the potential benefit of focusing NASA's human-spaceflight program, which has languished in recent years.
The troubled Constellation program, started under President George W. Bush to return astronauts to the moon by 2020, was canceled under Obama for being behind schedule and over budget. Then Obama and Congress launched the SLS heavy-rocket program with no clear destination — though the idea of a manned mission to an asteroid was frequently mentioned.
Stalking both these efforts have been lingering questions on whether there is enough money and political will to sustain an ambitious human-spaceflight program. In 2009, a blue-ribbon panel of experts warned of the dangers of "pursuing goals that do not match allocated resources."
A member of that panel — former NASA astronaut and space-station commander Leroy Chiao — had mixed feelings about the outpost idea.
A station beyond the the moon carried a "dramatically higher" risk of radiation, he said, and might not provide as much "value" for the investment as a "human-tended lunar base."
But Chiao added that the outpost idea "makes sense for future fuel depots, and possibly for human-tended stations as a jumping off point for deeper space exploration."
WASHINGTON — Top NASA officials have picked a leading candidate for the agency's next major mission: construction of a new outpost that would send astronauts farther from Earth than at any time in history.
The so-called "gateway spacecraft" would hover in orbit on the far side of the moon, support a small astronaut crew and function as a staging area for future missions to the moon and Mars.
At 277,000 miles from Earth, the outpost would be far more remote than the current space station, which orbits a little more than 200 miles above Earth. The distance raises complex questions of how to protect astronauts from the radiation of deep space — and rescue them if something goes wrong.
NASA Chief Charlie Bolden briefed the White House earlier this month on details of the proposal, but it's unclear whether it has the administration's support. Of critical importance is the price tag, which would certainly run into the billions of dollars.
Documents obtained by the Orlando Sentinel show that NASA wants to build a small outpost — likely with parts left over from the $100 billion International Space Station — at what's known as the Earth-Moon Lagrange Point 2, a spot about 38,000 miles from the moon and 277,000 miles from Earth.
At that location, the combined gravities of the Earth and moon reach equilibrium, making it possible to "stick" an outpost there with minimal power required to keep it in place.
To get there, NASA would use the massive rocket and space capsule that it is developing as a successor to the retired space shuttle. A first flight of that rocket is planned for 2017, and construction of the outpost would begin two years later, according to NASA planning documents.
Potential missions include the study of nearby asteroids or dispatching robotic trips to the moon that would gather moon rocks and bring them back to astronauts at the outpost. The outpost also would lay the groundwork for more-ambitious trips to Mars' moons and even Mars itself, about 140 million miles away on average.
Placing a "spacecraft at the Earth-Moon Lagrange point beyond the moon as a test area for human access to deep space is the best near-term option to develop required flight experience and mitigate risk," concluded the NASA report.
From NASA's perspective, the outpost solves several problems.
It gives purpose to the Orion space capsule and the Space Launch System rocket, which are being developed at a cost of about $3 billion annually. It involves NASA's international partners, as blueprints for the outpost suggest using a Russian-built module and components from Italy. And the outpost would represent a baby step toward NASA's ultimate goal: human footprints on Mars.
But how the idea — and cost — play with President Barack Obama, Congress and the public remains a major question. The price tag is never mentioned in the NASA report.
Spending is being slashed across the federal government in the name of deficit reduction; it's unlikely that NASA in coming years can get more than its current budget of $17.7 billion — if that.
The planning documents indicate the outpost is possible only with "modest increases" to the current budget — and that presumes none of the cost overruns that have characterized recent NASA projects. Indeed, the first construction flight in 2019 is labeled "unfunded" in briefing charts, as is a robotic "sample return" moon mission in 2022.
One NASA supporter in Congress — U.S. Rep. Bill Posey, R-Rockledge — said he liked the idea. But he said it would require strong White House backing to convince Congress to finance it.
NASA funding "always has been very precarious," Posey said. "And money is going to get tighter."
The White House did not respond to a request for comment, and a NASA statement was noncommittal about the outpost.
"There are many options — and many routes — being discussed on our way to the Red Planet," said spokesman David Weaver. "In addition to the moon and an asteroid, other options may be considered as we look for ways to buy down risk — and make it easier — to get to Mars.
A second major concern is astronaut safety. It will take days to get to the outpost — the farthest NASA has flown humans since the moon missions of 40 years ago — making rescue and supply missions difficult. The planning documents are unclear on whether astronauts would be permanently stationed at the outpost or there part time.
Another concern is how NASA intends to address the dangers of deep space, especially radiation.
The outpost would be more vulnerable to space radiation because it would be largely beyond the protective shield of Earth's magnetic field, said scientists with the National Space Biomedical Research Institute.
"It is significantly more difficult to shield and protect their [astronauts'] health" at that location, said Jeff Chancellor, an NSBRI scientist.
These worries are not lost on NASA officials. The planning documents note that an outpost mission would require a "culture change" that includes the "acceptance of risk significantly different" from the shuttle program, which lost two crews in 1986 and 2003.
Still, the idea has the potential benefit of focusing NASA's human-spaceflight program, which has languished in recent years.
The troubled Constellation program, started under President George W. Bush to return astronauts to the moon by 2020, was canceled under Obama for being behind schedule and over budget. Then Obama and Congress launched the SLS heavy-rocket program with no clear destination — though the idea of a manned mission to an asteroid was frequently mentioned.
Stalking both these efforts have been lingering questions on whether there is enough money and political will to sustain an ambitious human-spaceflight program. In 2009, a blue-ribbon panel of experts warned of the dangers of "pursuing goals that do not match allocated resources."
A member of that panel — former NASA astronaut and space-station commander Leroy Chiao — had mixed feelings about the outpost idea.
A station beyond the the moon carried a "dramatically higher" risk of radiation, he said, and might not provide as much "value" for the investment as a "human-tended lunar base."
But Chiao added that the outpost idea "makes sense for future fuel depots, and possibly for human-tended stations as a jumping off point for deeper space exploration."