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[Questions for NASA After Rocket Explosion] - [VOA - Voice of America English News]

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  10/29/2014  Questions for NASA after Rocket Explosion  An unmanned privately-owned rocket bringing supplies  to the International Space Station exploded seconds afterlaunch Tuesday night. The accident did not cause any injuries on the ground. However, it has raised questions aboutefforts by the US space agency NASA to use private companies to carry out near-Earth space exploration andsupply missions. NASA Antares Rocket Launch Explosion  The Antares rocket exploded as it took off from NASA’s launch center in Wallops Island, Virginia. Orbital SciencesCorporation built the rocket. It was carrying a Cygnus supply vehicle containing more than 2,200 kilograms ofsupplies and experiments to the International Space Station, or ISS.However, during a press conference on Tuesday night, NASA’s William Gerstenmaier said none of the supplies werein his words, critical, to the space station crew. He said the ISS crew is in no danger. NASA news conference following the Orbital launch explosion  NASA officials have blocked off the area on Wallops Island. They warn that some of the wreckage  from the rocketmay be dangerous.News reports centered on the Antares rocket’s engines soon after the explosion. They are Russian-built rocketengines updated in the U.S. They were first designed in the late 1960s to carry Soviet cosmonauts to the moon. The liquid-fueled  engines were chosen for their power to lift heavy loads.Frank Culbertson is Executive Vice President and General Manager of Advanced Programs for Orbital Sciences. He says the engines were tested in the U.S. However, the website reported that the designexploded during a test at Stennis Space Center in Mississippi in May.Mr. Culbertson said the company has a lot of information to study to learn about what happened. He noted:“We don’t know if it was the engine or not. That’s something we’ll try to determine as quickly as possible.”He added that the history of the engine has been well-documented. He also noted that the rocket cost the companyabout $200 million. The launch was to be the Antares rocket’s third supply mission to the ISS. Orbital Sciencesreleased a statement saying: “As soon as we understand the cause we will begin the necessary work to return toflight.”Elon Musk is the chief executive of SpaceX, a competitor  to Orbital Sciences. In a 2012 interview with Wiredmagazine, Mr. Musk had strongly criticized the Russian-built engines used by Orbital Sciences.The accident has drawn attention to NASA’s dependence on private companies in the U.S. to provide space flightvehicles and services. NASA is paying Orbital Sciences Corporations and the company SpaceX in California billionsof dollars to bring supplies to the ISS. The US space agency also wants SpaceX and aerospace  company Boeingto start launching astronauts to the orbiting laboratory by 2017.Recently, NASA announced its choice of two spaceships, one built by Boeing and the other by SpaceX to bringAmerican astronauts to the International Space Station. The program is to cost $6.8 billion.NASA officials say the International Space Station remains well supplied. On Wednesday, Russia successfullylaunched an unmanned Soyuz rocket and supply ship from its space center in Baikonur, Kazakhstan. The Progress57 cargo ship is expected to reach the ISS Wednesday.I’m Mario Ritter. Mario Ritter wrote this report for VOA’s Learning English. Materials form NASA, the Associated Press, Reuters and VOA were used. Hai Do was the editor.  ____________________________________________________________  Word in this Story [Questions for NASA after Rocket Explosion] - [VOA - Voice of Ameri... de 229/10/2014 23:36  supplies-   n. the amount of something that can be given or sold to others; needed equipment, food and other items wreckage- n. what remains of something severely damaged or destroyed liquid-fueled- adj.  (relating to rockets) using a liquid fuel rather than a solid fuel competitor- n.  any person or group trying to gain or do better at something than another person or group (example,a business competitor) aerospace- adj.  describing the industry of manufacturing aircraft and spacecraft  Now it’s your turn to use these Words in This Story  . In the comments section, write a sentence using one of these words and we will provide feedback on your use of vocabulary and grammar.  [Questions for NASA after Rocket Explosion] - [VOA - Voice of Ameri... de 229/10/2014 23:36
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