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Latest Discussions
Matt @ 10-18-10 16:33
Read: 1,970 Comments: 0
Recommended Sites
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| NASA's Ares I Rocket First Stage Igniter Successfully Tested |
| Posted by Matt - 04-6-09 00:00 - 0 comments |
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Ares I DM-1 Igniter Test (Quicktime .MOV H.264 format)NASA has completed a successful test firing of the igniter that will be used to start the Ares I rocket first stage motor.The March 10 test paves the way for the initial ground test of the Ares I first stage later this year. Ares I is the first launch vehicle in NASA's Constellation Program family of space vehicles that will transport astronauts and cargo to the International Space Station, the moon and beyond in coming decades."This successful test represents a milestone in our continuing development of the Ares I first stage," said Alex Priskos, first stage manager for the Ares Projects at NASA's Marshall Space Flight Center in Huntsville, Ala. "We continue to design a robust propulsion system that will provide a safe and reliable means of transportation for NASA's future missions of exploration."The test, conducted at ATK Launch Systems test facilities near Promontory, Utah, generated a flame almost 200 feet in length. Initial data showed the igniter performed as expected. ATK Launch Systems, a division of Alliant Techsystems of Brigham City, Utah, is the prime contractor for the Ares I first stage.The Ares I igniter is an enhanced version of the flight-proven igniter used in the space shuttle's solid rocket boosters. The igniter takes advantage of upgraded liner and insulation materials that have improved thermal properties which protect the igniter's case from the burning solid propellant.The new igniter is approximately 18 inches in diameter and 36 inches long. It is a small, high-burn-rate solid rocket motor that is secured in the forward segment of a five-segment booster. Once the command is sent to the igniter, a sequence begins that sends a flame down the core of the 142-foot solid rocket motor. In less than a second, the booster generates more than 3.5 million pounds of thrust, triggering liftoff of the rocket.The Ares I rocket is an in-line, two-stage rocket topped by the Orion crew capsule; its service module and a launch abort system. The first Ares I test flight, called Ares I-X, is scheduled for later this year. The first crewed flight of Orion is planned for 2015, with the first lunar excursion scheduled for 2020.NASA's Constellation Program, which is building the spacecraft that will return us to the moon, includes the Ares I rocket, the Ares V heavy cargo launch vehicle, the Orion crew capsule and the Altair lunar lander. Marshall manages the Ares Projects.For more information about Ares, visit: http://www.nasa.gov/aresFor more information about NASA programs, visit: http://www.nasa.gov
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| NASA Prepares for New Juno Mission to Jupiter |
| Posted by Matt - 12-6-08 20:39 - 1 comments |
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WASHINGTON -- NASA is officially moving forward on a mission to conduct an unprecedented, in-depth study of Jupiter. Called Juno, the mission will be the first in which a spacecraft is placed in a highly elliptical polar orbit around the giant planet to understand its formation, evolution and structure. Underneath its dense cloud cover, Jupiter safeguards secrets to the fundamental processes and conditions that governed our early solar system. "Jupiter is the archetype of giant planets in our solar system and formed very early, capturing most of the material left after the sun formed," said Scott Bolton, Juno principal investigator from the Southwest Research Institute in San Antonio. "Unlike Earth, Jupiter's giant mass allowed it to hold onto its original composition, providing us with a way of tracing our solar system's history." The spacecraft is scheduled to launch aboard an Atlas rocket from Cape Canaveral, Fla., in August 2011, reaching Jupiter in 2016. The spacecraft will orbit Jupiter 32 times, skimming about 3,000 miles over the planet's cloud tops for approximately one year. The mission will be the first solar powered spacecraft designed to operate despite the great distance from the sun. "Jupiter is more than 400 million miles from the sun or five times further than Earth," Bolton said. "Juno is engineered to be extremely energy efficient." The spacecraft will use a camera and nine science instruments to study the hidden world beneath Jupiter's colorful clouds. The suite of science instruments will investigate the existence of an ice-rock core, Jupiter's intense magnetic field, water and ammonia clouds in the deep atmosphere, and explore the planet's aurora borealis. "In Greek and Roman mythology, Jupiter's wife Juno peered through Jupiter's veil of clouds to watch over her husband's mischief," said Professor Toby Owen, co-investigator at the University of Hawaii in Honolulu. "Our Juno looks through Jupiter's clouds to see what the planet is up to, not seeking signs of misbehavior, but searching for whispers of water, the ultimate essence of life." Understanding the formation of Jupiter is essential to understanding the processes that led to the development of the rest of our solar system and what the conditions were that led to Earth and humankind. Similar to the sun, Jupiter is composed mostly of hydrogen and helium. A small percentage of the planet is composed of heavier elements. However, Jupiter has a larger percentage of these heavier elements than the sun. "Juno's extraordinarily accurate determination of the gravity and magnetic fields of Jupiter will enable us to understand what is going on deep down in the planet," said Professor Dave Stevenson, co-investigator at the California Institute of Technology in Pasadena. "These and other measurements will inform us about how Jupiter's constituents are distributed, how Jupiter formed and how it evolved, which is a central part of our growing understanding of the nature of our solar system." Deep in Jupiter's atmosphere, under great pressure, hydrogen gas is squeezed into a fluid known as metallic hydrogen. At these great depths, the hydrogen acts like an electrically conducting metal which is believed to be the source of the planet's intense magnetic field. Jupiter also may have a rocky solid core at the center. "Juno gives us a fantastic opportunity to get a picture of the structure of Jupiter in a way never before possible," said James Green, director of NASA's Planetary Division at NASA Headquarters in Washington. "It will allow us to take a giant step forward in our understanding on how giant planets form and the role that plays in putting the rest of the solar system together. " The Juno mission is the second spacecraft designed under NASA's New Frontiers Program. The first was the Pluto New Horizons mission, launched in January 2006 and scheduled to reach Pluto's moon Charon in 2015. The program provides opportunities to carry out several medium-class missions identified as top priority objectives in the Decadal Solar System Exploration Survey, conducted by the Space Studies Board of the National Research Council in Washington. NASA's Jet Propulsion Laboratory in Pasadena, Calif., manages the Juno mission. Lockheed Martin of Denver is building the spacecraft. The Italian Space Agency is contributing an infrared spectrometer instrument and a portion of the radio science experiment. For more information about the Juno mission, visit: http://juno.nasa.gov
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Read 140,686 times - last comment by RonaldRex
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| NASA CALLS FOR COMMENT ON DRAFT ARES V REQUEST FOR PROPOSALS |
| Posted by Matt - 12-6-08 20:37 - 0 comments |
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Hawthorne, CA - November 23, 2008 – Space Exploration Technologies Corp. (SpaceX) successfully conducted a full mission-length firing of its Falcon 9 launch vehicle's first stage at its McGregor Test Facility in Texas, on November 22. For the static test firing, the first stage remains firmly secured to the massive vertical test stand, where it fired for 178 seconds or nearly three minutes – simulating the climb of the giant rocket from the surface of the Earth towards orbit. At full power, the rocket generated 855,000 pounds of force at sea level. In vacuum, the thrust increases to approximately one million pounds or four times the maximum thrust of a 747 aircraft. The test consumed over half a million pounds of propellant. All nine engines fired for 160 seconds, then two engines were shut down to limit the acceleration and the remaining seven engines continued firing for 18 more seconds, as would occur in a typical climb to orbit. The test firing validated the design of SpaceX's use of nine engines on the first stage, as well as the ability to shut down engines without affecting the functioning of the remaining engines. This demonstrates the ability of Falcon 9 to lose engines in flight and still complete its mission successfully, much as a commercial airliner is designed to be safe in the event of an engine loss. Like an airliner, the Falcon 9 engines are enclosed in a protective sheath that ensures a fire or destructive loss of an engine doesn't affect the rest of the vehicle. The Falcon 9 will be the first vehicle since the Saturn V and Saturn 1 to have the ability to lose any engine/motor and still be able to complete its mission without loss of crew or spacecraft. Engine out reliability proved crucial to mission success on two of the Saturn V flights. "In the past month, we performed significant upgrades to the test stand and flame trench in preparation for this test," said Tom Mueller, Vice President of Propulsion for SpaceX. "We added the flight base heat shields around the engines to protect the bottom of the rocket from the prolonged blast of heat and vibration." "The full mission-length test firing clears the highest hurdle for the Falcon 9 first stage before launch," said Elon Musk, CEO and CTO of SpaceX. "In the next few months, we will have the first Falcon 9 flight vehicle on its launch pad at Cape Canaveral, preparing for lift-off in 2009." About SpaceX SpaceX is developing a family of launch vehicles intended to increase the reliability and reduce the cost of both manned and unmanned space transportation, ultimately by a factor of ten. With its Falcon line of launch vehicles, powered by internally-developed Merlin engines, SpaceX offers light, medium and heavy lift capabilities to deliver spacecraft into any altitude and inclination, from low-Earth to geosynchronous orbit to planetary missions. On September 28, 2008, Falcon 1, designed and manufactured from the ground up by SpaceX, became the first privately-developed liquid fuel rocket to achieve Earth orbit. As a winner of the NASA Commercial Orbital Transportation Services competition (COTS), SpaceX is in a position to help fill the gap in American spaceflight to the International Space Station (ISS) when the Space Shuttle retires in 2010. Under the existing Agreement, SpaceX will conduct three flights of its Falcon 9 launch vehicle and Dragon spacecraft for NASA, culminating in Dragon berthing with the ISS. SpaceX is the only COTS contender with the capability to return cargo to Earth and demonstrate the capability to carry crew to and from the ISS. Founded in 2002, the SpaceX team now numbers nearly 600, located primarily in Hawthorne, California, with four additional locations: SpaceX's Texas Test Facility in McGregor near Waco; offices in Washington DC; and launch facilities at Cape Canaveral, Florida, and the Marshall Islands in the Central Pacific. (IMG:http://www.spacex.com/assets/img/VTS3-027_MDC_Test_640x480.jpg) (Click picture to play video) Photo/Video Caption: The full mission duration test firing of the Falcon 9 rocket first stage lasted 178 seconds, nearly three minutes. Conducted at the SpaceX test facility in McGregor, Texas, the nine Merlin engines produced 855,000 lbs. of thrust and consumed over half a million pounds of liquid oxygen and rocket grade kerosene during the test.
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Read 1,093 times - make a comment
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| SpaceX Successfully Conducts Full Mission-Length Firing of its Falcon 9 Launch Vehicle |
| Posted by Matt - 12-6-08 20:36 - 0 comments |
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Hawthorne, CA - November 23, 2008 – Space Exploration Technologies Corp. (SpaceX) successfully conducted a full mission-length firing of its Falcon 9 launch vehicle's first stage at its McGregor Test Facility in Texas, on November 22. For the static test firing, the first stage remains firmly secured to the massive vertical test stand, where it fired for 178 seconds or nearly three minutes – simulating the climb of the giant rocket from the surface of the Earth towards orbit. At full power, the rocket generated 855,000 pounds of force at sea level. In vacuum, the thrust increases to approximately one million pounds or four times the maximum thrust of a 747 aircraft. The test consumed over half a million pounds of propellant. All nine engines fired for 160 seconds, then two engines were shut down to limit the acceleration and the remaining seven engines continued firing for 18 more seconds, as would occur in a typical climb to orbit. The test firing validated the design of SpaceX's use of nine engines on the first stage, as well as the ability to shut down engines without affecting the functioning of the remaining engines. This demonstrates the ability of Falcon 9 to lose engines in flight and still complete its mission successfully, much as a commercial airliner is designed to be safe in the event of an engine loss. Like an airliner, the Falcon 9 engines are enclosed in a protective sheath that ensures a fire or destructive loss of an engine doesn't affect the rest of the vehicle. The Falcon 9 will be the first vehicle since the Saturn V and Saturn 1 to have the ability to lose any engine/motor and still be able to complete its mission without loss of crew or spacecraft. Engine out reliability proved crucial to mission success on two of the Saturn V flights. "In the past month, we performed significant upgrades to the test stand and flame trench in preparation for this test," said Tom Mueller, Vice President of Propulsion for SpaceX. "We added the flight base heat shields around the engines to protect the bottom of the rocket from the prolonged blast of heat and vibration." "The full mission-length test firing clears the highest hurdle for the Falcon 9 first stage before launch," said Elon Musk, CEO and CTO of SpaceX. "In the next few months, we will have the first Falcon 9 flight vehicle on its launch pad at Cape Canaveral, preparing for lift-off in 2009." About SpaceX SpaceX is developing a family of launch vehicles intended to increase the reliability and reduce the cost of both manned and unmanned space transportation, ultimately by a factor of ten. With its Falcon line of launch vehicles, powered by internally-developed Merlin engines, SpaceX offers light, medium and heavy lift capabilities to deliver spacecraft into any altitude and inclination, from low-Earth to geosynchronous orbit to planetary missions. On September 28, 2008, Falcon 1, designed and manufactured from the ground up by SpaceX, became the first privately-developed liquid fuel rocket to achieve Earth orbit. As a winner of the NASA Commercial Orbital Transportation Services competition (COTS), SpaceX is in a position to help fill the gap in American spaceflight to the International Space Station (ISS) when the Space Shuttle retires in 2010. Under the existing Agreement, SpaceX will conduct three flights of its Falcon 9 launch vehicle and Dragon spacecraft for NASA, culminating in Dragon berthing with the ISS. SpaceX is the only COTS contender with the capability to return cargo to Earth and demonstrate the capability to carry crew to and from the ISS. Founded in 2002, the SpaceX team now numbers nearly 600, located primarily in Hawthorne, California, with four additional locations: SpaceX's Texas Test Facility in McGregor near Waco; offices in Washington DC; and launch facilities at Cape Canaveral, Florida, and the Marshall Islands in the Central Pacific. (IMG:http://www.spacex.com/assets/img/VTS3-027_MDC_Test_640x480.jpg) (Click picture to play video) Photo/Video Caption: The full mission duration test firing of the Falcon 9 rocket first stage lasted 178 seconds, nearly three minutes. Conducted at the SpaceX test facility in McGregor, Texas, the nine Merlin engines produced 855,000 lbs. of thrust and consumed over half a million pounds of liquid oxygen and rocket grade kerosene during the test.
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Read 1,142 times - make a comment
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| NASA's Shuttle Endeavour Glides Home After Successful Mission |
| Posted by Matt - 12-6-08 20:33 - 0 comments |
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EDWARDS, Calif. - Space shuttle Endeavour and its crew landed at 1:25 p.m. PST Sunday at Edwards Air Force Base in California, completing a 16-day journey of more than 6.6 million miles. The STS-126 mission featured important repair work and prepared the International Space Station to house six crew members on long-duration missions beginning next year. The new station equipment includes a water recovery system, additional sleeping quarters, a second toilet and an exercise device. During four spacewalks, the crew serviced the station's two Solar Alpha Rotary Joints, which allow its solar arrays to track the sun, and installed new hardware that will support future assembly missions.Chris Ferguson commanded the flight and was joined by Pilot Eric Boe and Mission Specialists Donald Pettit, Steve Bowen, Heidemarie Stefanyshyn-Piper, Shane Kimbrough and Sandra Magnus. Magnus remained aboard the station, replacing Expedition 18 Flight Engineer Greg Chamitoff, who returned to Earth on Endeavour after more than five months on the station.Weather concerns prevented the crew from returning to NASA's Kennedy Space Center in Florida, the primary end-of-mission landing site. In 7-10 days, Endeavour will be transported approximately 2,500 miles from California to Florida on the back of a modified 747 jumbo jet. Once at Kennedy, Endeavour will be separated from the aircraft to begin immediate processing for its next flight, targeted for May 2009.STS-126 was the 124th space shuttle mission, the 22nd flight for Endeavour and the 27th shuttle visit to the station.With Endeavour and its crew safely home, the stage is set for the launch of STS-119, targeted for Feb. 12, 2009. Discovery will deliver the final pair of U.S. solar arrays, which will be installed on the starboard end of the station's truss. The truss serves as the backbone support for external equipment and spare components.Lee Archambault will command the 14-day flight that will include four planned spacewalks. Joining him will be Pilot Tony Antonelli, Mission Specialists John Phillips, Steve Swanson, Joseph Acaba and Richard Arnold, and Japan Aerospace Exploration Agency astronaut Koichi Wakata. Wakata will replace Magnus on the station as a flight engineer.For more about the STS-126 mission and the upcoming STS-119 mission, visit: http://www.nasa.gov/shuttle For more about the International Space Station, visit: http://www.nasa.gov/station
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