NASA picks 3 private firms to develop space taxis

WASHINGTON (AP) -- NASA picked three aerospace companies Friday to build small rocketships to take astronauts to the International Space Station.

This is the third phase of NASA's efforts to get private space companies to take over the job of the now-retired space shuttle. The companies will share more than $1.1 billion. Two of the ships are capsules like in the Apollo era and the third is closer in design to the space shuttle.

Once the spaceships are built, NASA plans to hire the private companies to taxi astronauts into space within five years. Until they are ready, NASA is paying Russia about $63 million per astronaut to do the job.

In a statement, NASA Administrator Charles Bolden said the move "will help keep us on track to tend the outsourcing of human spaceflight."

NASA hopes that by having private firms ferry astronauts into low Earth orbit, it can focus on larger long-term goals, like sending crews to a nearby asteroid and eventually Mars. The private companies can also make money in tourism and other non-NASA business.

The three companies are the Boeing Co. of Houston, Space Exploration Technologies, called SpaceX, of Hawthorne, Calif., and Sierra Nevada Corp. of Louisville, Colo.

They are quite different companies. Boeing is one of the oldest and largest space companies with a long history of building and launching rockets and working for NASA, going back to the Mercury days. SpaceX is a relatively new company started by Elon Musk, who helped create PayPal and runs the electric car company Tesla Motors. Sierra Nevada has been in the space business for 25 years but mostly on a much smaller scale than Boeing.

NASA's commercial crew development program started with seven companies. The other companies that were not chosen can still build private rocketships and NASA still has the option to hire them to ferry astronauts at a later date, NASA spokesman Trent Perrotto said.

Boeing is slated to get the most money, $460 million for its seven-person CST-100 capsule. It would launch on an Atlas rocket, with the first test flight 2016. The company won't say how much it would charge NASA per seat, but it will be "significantly lower" than the Russian price, said John Mulholland, Boeing vice president. He said Boeing's long experience in working with NASA on human flight gives it a "leg up" on its competitors.

SpaceX is already in the lead in the private space race. The company earlier this year used their Falcon rocket to launch their Dragon capsule into orbit. It docked with the space station and successfully delivered cargo. NASA plans to give the company $440 million. The capsule holds seven people and will have its first test launch with people in 2015, said spokeswoman Kirstin Brost Grantham. The company will charge NASA about $20 million per seat, she said.

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NASA picks 3 private firms to develop space taxis

NASA Awards Over $1 Billion In Contracts To Develop Commercial Spaceflight

Earlier today, NASA announced that it has awarded over $1.1 billion in contracts to the Sierra Nevada Corporation, Boeing, and SpaceX as part of its Commercial Crew Integrated Capability initiative.  The goal of the Initiative has been to develop crewed flight capabilities as a means to provide both government and commercial entities the ability to travel to the International Space Station and ...

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NASA Awards Over $1 Billion In Contracts To Develop Commercial Spaceflight

Stephen Colbert offers a tip of the hat to NASA's Mars Rover (+video)

NASA administrator and veteran astronaut John Grunsfeld appeared on the Colbert Report on Wednesday, where he discussed the planned landing of NASA's Curiosity Mars rover, which is scheduled to land on the Red Planet on Sunday night.

Even TV comedian Stephen Colbert isn't immune to the excitement surrounding the historic upcoming landing of NASA's newest rover on Mars.

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The huge Mars Science Laboratory, also known as theCuriosity rover, is slated to touch down on the Red Planet on Aug. 5 at 10:31 p.m. PDT (1:31 a.m. EDT Aug. 6; 0531 GMT). The rover's thrilling descent through the Martian atmosphere is so complex that it has been nicknamed "theseven minutes of terror."

John Grunsfeld, a former veteran astronaut and NASA's associate administrator for science missions, spoke to Colbert about the Curiosity rover's landing Wednesday (Aug. 1), during an appearance on Comedy Central's hit late-night faux-conservative news show "The Colbert Report."

With the help of an animated video of Curiosity's landing, Grunsfeld detailed the steps involved in the rover's harrowing journey to the surface of Mars.

"As it enters the atmosphere, it will start slowing down," Grunsfeld explained. "It will reach about 10 Gs of acceleration."

Before setting its wheels down on the Red Planet, a supersonic parachute, followed by a rocket-powered sky crane, will help slow the rover's speed from more than 13,000 mph (21,000 kilometers per hour) to zero in only seven minutes. [Photos: Stephen Colbert Visits NASA]

"That's not science fiction that's really going to happen on Monday," Colbert said following the animation.

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Stephen Colbert offers a tip of the hat to NASA's Mars Rover (+video)

Will NASA's $2.5 billion Mars rover crash on Sunday? (+video)

NASA's Curiosity Mars rover faces a terrifying seven-minute plunge through the Red Planet's atmosphere using a first-of-its-kind landing system involving a supersonic parachute and a 'sky-crane' that will lower the rover to the Martian surface.

Day by day, hour by hour, the tension is building. NASAs mega-mission to Mars and delivery of the Curiosity rover could be a smashing success or just smashing.

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The Mars Science Laboratorys 1-ton Curiosity rover is factory-equipped with science gear to delve into whether Mars ever was or might be today an eco-friendly setting able to sustain microbial life.

A seven-minute, terrorizing plunge through the planets atmosphere awaits the spacecraft. MSLs Curiosity rover is scheduled to touch down at Gale Crater at 10:30 p.m. PDT on Aug. 5 (1:30 a.m. EDT, 0530 GMT, Aug. 6).

At that moment, NASAs Mars Reconnaissance Orbiter is to attempt imaging the final seconds of the robot's death-defying high dive.

"We will indeed be imaging the spot MSL is predicted to be about 60 seconds prior to landing, but the odds of capturing it are estimated at 60 percent," said Alfred McEwen at the University of Arizona in Tucson. He is principal investigator of the orbiter's super-powerful High Resolution Imaging Science Experiment (HiRISE). [Mars Rover Curiosity's Daring Landing in Pictures]

"The chips are really down on this one," said Robert Zubrin, president of the Mars Society, which is dedicated to the human exploration and settlement of Mars.

"If it succeeds, it will be far and away the best Mars mission ever. It will make extraordinary scientific discoveries and fire the public's imagination with the vision of exploring another world," he told SPACE.com.

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Will NASA's $2.5 billion Mars rover crash on Sunday? (+video)

Stephen Colbert offers a tip of the hat to NASA's Mars Rover

NASA administrator and veteran astronaut John Grunsfeld appeared on the Colbert Report on Wednesday, where he discussed the planned landing of NASA's Curiosity Mars rover, which is scheduled to land on the Red Planet on Sunday night.

Even TV comedian Stephen Colbert isn't immune to the excitement surrounding the historic upcoming landing of NASA's newest rover on Mars.

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Click Here for your FREE 30 DAYS of The Christian Science Monitor Weekly Digital Edition

The huge Mars Science Laboratory, also known as theCuriosity rover, is slated to touch down on the Red Planet on Aug. 5 at 10:31 p.m. PDT (1:31 a.m. EDT Aug. 6; 0531 GMT). The rover's thrilling descent through the Martian atmosphere is so complex that it has been nicknamed "theseven minutes of terror."

John Grunsfeld, a former veteran astronaut and NASA's associate administrator for science missions, spoke to Colbert about the Curiosity rover's landing Wednesday (Aug. 1), during an appearance on Comedy Central's hit late-night faux-conservative news show "The Colbert Report."

With the help of an animated video of Curiosity's landing, Grunsfeld detailed the steps involved in the rover's harrowing journey to the surface of Mars.

"As it enters the atmosphere, it will start slowing down," Grunsfeld explained. "It will reach about 10 Gs of acceleration."

Before setting its wheels down on the Red Planet, a supersonic parachute, followed by a rocket-powered sky crane, will help slow the rover's speed from more than 13,000 mph (21,000 kilometers per hour) to zero in only seven minutes. [Photos: Stephen Colbert Visits NASA]

"That's not science fiction that's really going to happen on Monday," Colbert said following the animation.

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Stephen Colbert offers a tip of the hat to NASA's Mars Rover

Will NASA's $2.5 billion Mars rover crash on Sunday?

NASA's Curiosity Mars rover faces a terrifying seven-minute plunge through the Red Planet's atmosphere using a first-of-its-kind landing system involving a supersonic parachute and a 'sky-crane' that will lower the rover to the Martian surface.

Day by day, hour by hour, the tension is building. NASAs mega-mission to Mars and delivery of the Curiosity rover could be a smashing success or just smashing.

Subscribe Today to the Monitor

Click Here for your FREE 30 DAYS of The Christian Science Monitor Weekly Digital Edition

The Mars Science Laboratorys 1-ton Curiosity rover is factory-equipped with science gear to delve into whether Mars ever was or might be today an eco-friendly setting able to sustain microbial life.

A seven-minute, terrorizing plunge through the planets atmosphere awaits the spacecraft. MSLs Curiosity rover is scheduled to touch down at Gale Crater at 10:30 p.m. PDT on Aug. 5 (1:30 a.m. EDT, 0530 GMT, Aug. 6).

At that moment, NASAs Mars Reconnaissance Orbiter is to attempt imaging the final seconds of the robot's death-defying high dive.

"We will indeed be imaging the spot MSL is predicted to be about 60 seconds prior to landing, but the odds of capturing it are estimated at 60 percent," said Alfred McEwen at the University of Arizona in Tucson. He is principal investigator of the orbiter's super-powerful High Resolution Imaging Science Experiment (HiRISE). [Mars Rover Curiosity's Daring Landing in Pictures]

"The chips are really down on this one," said Robert Zubrin, president of the Mars Society, which is dedicated to the human exploration and settlement of Mars.

"If it succeeds, it will be far and away the best Mars mission ever. It will make extraordinary scientific discoveries and fire the public's imagination with the vision of exploring another world," he told SPACE.com.

Read this article:

Will NASA's $2.5 billion Mars rover crash on Sunday?

NASA Marking Historic Mars Rover Landing with Flurry of Events

NASA's car-size Curiosity rover is days away from its high-stakes landing on Mars, and a host of planned events will allow people to follow along as the spacecraft makes its thrilling journey to the surface of the Red Planet.

After traveling through space for about 8.5 months, Curiosity (also called the Mars Science Laboratory) is scheduled to touch down on Mars on Aug. 5 at 10:31 p.m. PDT (1:31 a.m. EDT Aug. 6; 0531 GMT).

The rover will descend to the surface attached to a rocket-powered sky crane, which will be used to slow the spacecraft's speed from more than 13,000 miles per hour (21,000 kilometers per hour) to zero as it flies through the Martian atmosphere. This unprecedented landing is so complex that it has been nicknamed "the seven minutes of terror."

"The Curiosity landing is the hardest NASA robotic mission ever attempted in the history of exploration of Mars, or any of our robotic exploration," John Grunsfeld, NASA's associate administrator for science missions, said in a recent news briefing.

Curiosity is equipped with a suite of 10 instruments to investigate whether Mars is, or ever was, a suitable place to host microbial life. The rover's nail-biting landing on Mars, coupled with its intriguing mission, could garner wide interest in the $2.5 billion endeavor, NASA officials said. [Photos: How Mars Rover Curiosity's Landing Works]

It also helps that the high-profile landing happens to fall during a time when more people, particularly students, are able to pay close attention, Grunsfeld said.

"Given that we are in the heart of summer, there's a real opportunity to achieve tremendous broad public engagement on this adventure on Mars," he said.

NASA is planning a host of events for educational outreach and to build awareness about the mission among the public.

"We're going to engage summer camps, science centers, our NASA centers," Grunsfeld said. "In fact, all around the world, people will be following the Mars Science Laboratory landing and the subsequent adventures of the Curiosity rover."

The agency is hosting its first-ever multi-center social media event tomorrow (Aug. 3). The simulcast event will connect seven NASA centers, including the agency's Jet Propulsion Laboratory in Pasadena, Calif., the mission control epicenter for the Mars Science Laboratory mission.

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NASA Marking Historic Mars Rover Landing with Flurry of Events

2012 NASA Advanced Technology Concepts Selected For Study

NASA's Space Technology Program is turning science fiction into science fact. The program has selected 28 proposals for study under the NASA Innovative Advanced Concepts (NIAC) Program.

Eighteen of these advanced concept proposals were categorized as Phase I and 10 as Phase II. They were selected based on their potential to transform future aerospace missions, enable new capabilities, or significantly alter and improve current approaches to launching, building and operating aerospace systems.

The selected proposals include a broad range of imaginative concepts, including a submarine glider to explore the ice-covered ocean of Europa, an air purification system with no moving parts, and a system that could use in situ lunar regolith to autonomously build concrete structures on the moon.

"These selections represent the best and most creative new ideas for future technologies that have the potential to radically improve how NASA missions explore new frontiers," said Michael Gazarik, director of NASA's Space Technology Program at the agency's headquarters in Washington. "Through the NASA Innovative Advanced Concepts program, NASA is taking the long-term view of technological investment and the advancement that is essential for accomplishing our missions. We are inventing the ways in which next-generation aircraft and spacecraft will change the world and inspiring Americans to take bold steps."

NIAC Phase I awards of approximately $100,000 for one year enable proposers to explore basic feasibility and properties of a potential breakthrough concept. NIAC Phase II awards of as much as $500,000 for two years help further develop the most successful Phase I concepts and analyze their potential to enable new or radically improved future NASA missions and potential applications with benefits for industry and society.

"We're excited to be launching Phase II, allowing the 2012 NIAC portfolio to feature an exciting combination of new ideas and continued development of last year's Phase I concepts," said Jay Falker, NIAC program executive at NASA Headquarters.

NASA solicited visionary, long-term concepts for technological maturation based on their potential value to NASA's future space missions and operational needs. These projects were chosen through a peer-review process that evaluated their innovation and how technically viable they are. All are very early in development -- 10 years or longer from use on a mission.

NASA's early investment and partnership with creative scientists, engineers, and citizen inventors from across the nation will provide technological dividends and help maintain America's leadership in the global technology economy.

The portfolio of diverse and innovative ideas selected for NIAC awards represent multiple technology areas, including power, propulsion, structures, and avionics, as identified in NASA's Space Technology Roadmaps. The roadmaps provide technology paths needed to meet NASA's strategic goals.

NIAC is part of NASA's Space Technology Program, which is innovating, developing, testing, and flying hardware for use in NASA's future missions. These competitively-awarded projects are creating new technological solutions for NASA and our nation's future.

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2012 NASA Advanced Technology Concepts Selected For Study

New NASA Mars Rover is a Red Planet Mini-Truck, Ford Says

NASA's newest Mars rover is just days away from landing on the Red Planet, and space agency officials have long compared the six-wheeled robot's size to that of a Mini Cooper car. But one car manufacturer says not so fast — Curiosity has some striking similarities to a Raptor truck, according to the Ford Motor Co.

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New NASA Mars Rover is a Red Planet Mini-Truck, Ford Says

NASA's Curiosity rover completes crucial course correction en route to Mars

NASA's car sized Curiosity Mars Science Lab fired its thrusters to set in on course for its scheduled touchdown in the Red Planet'sGale Crater, where, if the landing goes well, it will begin searching for signs of habitability.

Now just 1 week out from landing beside a 3 mile high (5 km) layered Martian mountain in search of lifes ingredients, aiming thrusters aboard the cruise stage of NASAs car sized Curiosity Mars Science Lab successfully fired to set the rover precisely on course for a touchdown on Mars at about 1:31 a.m. EDT (531 GMT) early on Aug. 6 (10:31 p.m. PDT on Aug. 5).

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Two precise and brief thruster bursts lasting about 7 seconds were successfully carried out just hours ago earlier today at 1 a.m. on July 29, EDT (10 p.m. PDT on July 28). The effect was to change the spacecrafts velocity by about 1/40 MPH or 1 cm/sec as it smashes into Mars at about 13,200 mph (5,900 meters per second).

This was the fourth and possibly last of 6 interplanetary Trajectory Correction Manuevers (TCMs) planned by mission engineers to steer Curiosity since departing Earth for the Red Planet.

If necessary, 2 additional TCMs could be implemented in the final 48 hours next Saturday and Sunday before Curiosity begins plunging into the Martian atmosphere late Sunday night on a do or die mission to land inside the 100 mile wide Gale Crater with a huge mountain in the middle. All 6 TCM maneuvers were preplanned long before the Nov 26, 2011 liftoff from Cape Canaveral, Florida.

Without this course correction firing, MSL would have hit a point at the top of the Martian atmosphere about 13 miles (21 kilometers) east of the target entry point. During the preprogrammed Entry, Descent and Landing (EDL) sequence the vehicle can steer itself in the upper atmosphere to correct for an error amounting to a few miles.

On landing day, MSL can steer enough during its flight through the upper atmosphere to correct for missing the target entry aim point by a few miles and still land on the intended patch of Mars real estate. The missions engineers and managers rated the projected 13-mile miss big enough to warrant a correction maneuver.

The purpose of this maneuver is to move the point at which Curiosity enters the atmosphere by about 13 miles, said Tomas Martin-Mur of NASAs Jet Propulsion Laboratory, Pasadena, Calif., chief of the missions navigation team. The first look at telemetry and tracking data afterwards indicates the maneuver succeeded as planned.

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NASA's Curiosity rover completes crucial course correction en route to Mars

NASA's Curiosity rover completes crucial course correction en route to Mars (+video)

NASA's car sized Curiosity Mars Science Lab fired its thrusters to set in on course for its scheduled touchdown in the Red Planet'sGale Crater, where, if the landing goes well, it will begin searching for signs of habitability.

Now just 1 week out from landing beside a 3 mile high (5 km) layered Martian mountain in search of lifes ingredients, aiming thrusters aboard the cruise stage of NASAs car sized Curiosity Mars Science Lab successfully fired to set the rover precisely on course for a touchdown on Mars at about 1:31 a.m. EDT (531 GMT) early on Aug. 6 (10:31 p.m. PDT on Aug. 5).

Subscribe Today to the Monitor

Click Here for your FREE 30 DAYS of The Christian Science Monitor Weekly Digital Edition

Two precise and brief thruster bursts lasting about 7 seconds were successfully carried out just hours ago earlier today at 1 a.m. on July 29, EDT (10 p.m. PDT on July 28). The effect was to change the spacecrafts velocity by about 1/40 MPH or 1 cm/sec as it smashes into Mars at about 13,200 mph (5,900 meters per second).

This was the fourth and possibly last of 6 interplanetary Trajectory Correction Manuevers (TCMs) planned by mission engineers to steer Curiosity since departing Earth for the Red Planet.

If necessary, 2 additional TCMs could be implemented in the final 48 hours next Saturday and Sunday before Curiosity begins plunging into the Martian atmosphere late Sunday night on a do or die mission to land inside the 100 mile wide Gale Crater with a huge mountain in the middle. All 6 TCM maneuvers were preplanned long before the Nov 26, 2011 liftoff from Cape Canaveral, Florida.

Without this course correction firing, MSL would have hit a point at the top of the Martian atmosphere about 13 miles (21 kilometers) east of the target entry point. During the preprogrammed Entry, Descent and Landing (EDL) sequence the vehicle can steer itself in the upper atmosphere to correct for an error amounting to a few miles.

On landing day, MSL can steer enough during its flight through the upper atmosphere to correct for missing the target entry aim point by a few miles and still land on the intended patch of Mars real estate. The missions engineers and managers rated the projected 13-mile miss big enough to warrant a correction maneuver.

The purpose of this maneuver is to move the point at which Curiosity enters the atmosphere by about 13 miles, said Tomas Martin-Mur of NASAs Jet Propulsion Laboratory, Pasadena, Calif., chief of the missions navigation team. The first look at telemetry and tracking data afterwards indicates the maneuver succeeded as planned.

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NASA's Curiosity rover completes crucial course correction en route to Mars (+video)

NASA's Journey to Tomorrow Exhibit Featured at Great New England Air Show

CLEVELAND - NASA's Glenn Research Center in Cleveland, Ohio invites visitors at the Great New England Air Show to explore interactive exhibits and participate in science, technology, engineering and math activities in NASA's Journey to Tomorrow traveling exhibit. This will be the first time NASA exhibits will be on display at the air show located on the Westover Air Reserve Base in Chicopee, Mass.

The exhibit engages guests in real world challenges relative to both aeronautics and space exploration. Visitors can explore technology on computer kiosks and hands-on workstations which include NASA Spinoffs where guests can learn about how NASA technology improves our quality of life; a quiz in Sci-Fi vs. Science Fact, where visitors can find out how much they know about space travel and the search for extraterrestrial life; and perform small experiments in a glovebox. Other activities include a solar system scale, where a person can find out how much they would weigh on another planet like Jupiter; and a planetary gravity simulator where guests can learn how gravity changes from planet to planet.

The exhibit is air-conditioned and wheelchair accessible.

Also available will be the popular "Picture Yourself in Space" photo booth, where visitors can receive a free souvenir photo taken as an astronaut and free NASA informational material.

The NASA exhibit area will be open to the public on Saturday, Aug. 4 and Sunday, Aug. 5 from 9 a.m. to 5 p.m.

For more information about NASA Glenn Research Center, visit: http://www.nasa.gov/glenn

For more information about the Journey To Tomorrow, visit: http://www.nasa.gov/centers/glenn/events/journey_to_tomorrow.html

For more information about the Great New England Air Show, visit: http://greatnewenglandairshow.com/

Please follow SpaceRef on Twitter and Like us on Facebook.

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NASA's Journey to Tomorrow Exhibit Featured at Great New England Air Show

Five essential facts about NASA's Mars Curiosity rover

NASA's Mars Curiosity rover is the most sophisticated robot ever sent to another world. Here are five facts about NASA's most audacious robotic mission yet.

NASA's new robot rover named Curiosity has spent 8 months hurtling through space toward its destination Sunday on Mars. It is set to land near the foot of a mountain rising from a giant crater. This marks NASA's 19th mission and eighth landing attempt.

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The big unknown remains. Scientists want to know if any form of life ever existed there, and that means microscopic organisms. Since the 1960s, spacecraft have zipped past, orbited or landed on Mars in this quest. Two small NASA rovers that arrived in 2004 explored different craters and one is still functioning today.

Curiosity is the most ambitious effort ever, but it's not the be-all and end-all. During its two-year exploration, it will try to answer whether the giant crater where it lands had the right conditions to support microbes. But future missions would still be needed for more answers.

Curiosity carries a toolbox of 10 instruments, including a rock-zapping laser and a mobile organic chemistry lab. It also has a long robotic arm that can jackhammer into rocks and soil. It will hunt for basic ingredients of life including carbon-based compounds, nitrogen, phosphorus, sulfur and oxygen, as well as minerals that might provide clues about possible energy sources.

The spacecraft is formally called the Mars Science Laboratory. In 2008, NASA held a naming contest open to students and selected Curiosity, proposed by a sixth-grader from Lenexa, Kan.

$2.5 billion. That's $1 billion over its original budget. Curiosity was supposed to launch in 2009 and land in 2010, but development took longer than expected. The delay gave engineers more time to debug problems and test the spacecraft, but also put the project over budget.

President Barack Obama has set a goal for astronauts to orbit Mars by the mid-2030s followed by a landing. Before that can happen, the plan is to send astronauts to an asteroid first.

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Five essential facts about NASA's Mars Curiosity rover

Five essential facts about NASA's Mars Curiosity rover (+video)

NASA's Mars Curiosity rover is the most sophisticated robot ever sent to another world. Here are five facts about NASA's most audacious robotic mission yet.

NASA's new robot rover named Curiosity has spent 8 months hurtling through space toward its destination Sunday on Mars. It is set to land near the foot of a mountain rising from a giant crater. This marks NASA's 19th mission and eighth landing attempt.

Subscribe Today to the Monitor

Click Here for your FREE 30 DAYS of The Christian Science Monitor Weekly Digital Edition

The big unknown remains. Scientists want to know if any form of life ever existed there, and that means microscopic organisms. Since the 1960s, spacecraft have zipped past, orbited or landed on Mars in this quest. Two small NASA rovers that arrived in 2004 explored different craters and one is still functioning today.

Curiosity is the most ambitious effort ever, but it's not the be-all and end-all. During its two-year exploration, it will try to answer whether the giant crater where it lands had the right conditions to support microbes. But future missions would still be needed for more answers.

Curiosity carries a toolbox of 10 instruments, including a rock-zapping laser and a mobile organic chemistry lab. It also has a long robotic arm that can jackhammer into rocks and soil. It will hunt for basic ingredients of life including carbon-based compounds, nitrogen, phosphorus, sulfur and oxygen, as well as minerals that might provide clues about possible energy sources.

The spacecraft is formally called the Mars Science Laboratory. In 2008, NASA held a naming contest open to students and selected Curiosity, proposed by a sixth-grader from Lenexa, Kan.

$2.5 billion. That's $1 billion over its original budget. Curiosity was supposed to launch in 2009 and land in 2010, but development took longer than expected. The delay gave engineers more time to debug problems and test the spacecraft, but also put the project over budget.

President Barack Obama has set a goal for astronauts to orbit Mars by the mid-2030s followed by a landing. Before that can happen, the plan is to send astronauts to an asteroid first.

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Five essential facts about NASA's Mars Curiosity rover (+video)