Wednesday, 24 June 2009

NASA Cassini Mission

June 24, 2009

Salt Finding from NASA's Cassini Hints at Ocean within Saturn Moon

PASADENA, Calif. -- For the first time, scientists working on NASA's Cassini mission have detected sodium salts in ice grains of Saturn's outermost ring. Detecting salty ice indicates that Saturn's moon Enceladus, which primarily replenishes the ring with material from discharging jets, could harbor a reservoir of liquid water -- perhaps an ocean -- beneath its surface. Cassini discovered the water-ice jets in 2005 on Enceladus. These jets expel tiny ice grains and vapor, some of which escape the moon's gravity and form Saturn's outermost ring. Cassini's cosmic dust analyzer has examined the composition of those grains and found salt within them. "We believe that the salty minerals deep inside Enceladus washed out from rock at the bottom of a liquid layer," said Frank Postberg, Cassini scientist for the cosmic dust analyzer at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Postberg is lead author of a study that appears in the June 25 issue of the journal Nature. Scientists on Cassini's cosmic dust detector team conclude that liquid water must be present because it is the only way to dissolve the significant amounts of minerals that would account for the levels of salt detected. The process of sublimation, the mechanism by which vapor is released directly from solid ice in the crust, cannot account for the presence of salt. "Potential plume sources on Enceladus are an active area of research with evidence continuing to converge on a possible salt water ocean," said Linda Spilker, Cassini deputy project scientist at NASA's Jet Propulsion Laboratory in Pasadena, Calif. "Our next opportunity to gather data on Enceladus will come during two flybys in November." The makeup of the outermost ring grains, determined when thousands of high-speed particle hits were registered by Cassini, provides indirect information about the composition of the plume material and what is inside Enceladus. The outermost ring particles are almost pure water ice, but nearly every time the dust analyzer has checked for the composition, it has found at least some sodium within the particles. "Our measurements imply that besides table salt, the grains also contain carbonates like soda. Both components are in concentrations that match the predicted composition of an Enceladus ocean," Postberg said. "The carbonates also provide a slightly alkaline pH value. If the liquid source is an ocean, it could provide a suitable environment on Enceladus for the formation of life precursors when coupled with the heat measured near the moon's south pole and the organic compounds found within the plumes." However, in another study published in Nature, researchers doing ground-based observations did not see sodium, an important salt component. That team notes that the amount of sodium being expelled from Enceladus is actually less than observed around many other planetary bodies. These scientists were looking for sodium in the plume vapor and could not see it in the expelled ice grains. They argue that if the plume vapor does come from ocean water the evaporation must happen slowly deep underground rather than as a violent geyser erupting into space. "Finding salt in the plume gives evidence for liquid water below the surface," said Sascha Kempf, also a Cassini scientist for the cosmic dust analyzer from the Max Planck Institute for Nuclear Physics. "The lack of detection of sodium vapor in the plume gives hints about what the water reservoir might look like." Determining the nature and origin of the plume material is a top priority for Cassini during its extended tour, called the Cassini Equinox Mission. "The original picture of the plumes as violently erupting Yellowstone-like geysers is changing," said Postberg."They seem more like steady jets of vapor and ice fed by a large water reservoir. However, we cannot decide yet if the water is currently 'trapped' within huge pockets in Enceladus' thick ice crust or still connected to a large ocean in contact with the rocky core." The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Cassini cosmic dust analyzer was provided by the German Aerospace Center. The Cassini orbiter was designed, developed and assembled at JPL. JPL manages the mission for the Science Mission Directorate at NASA Headquarters in Washington.

More information about the Cassini mission is available at:
http://www.nasa.gov/cassini

Space information available from www.nasa-space.co.uk

Spaceboosters NASA Education

June 24, 2009

NASA Selects Proposals to Enhance Science Education and Outreach

WASHINGTON -- NASA has selected four organizations to share approximately $18 million over five years for education and public outreach activities to help inspire the next generation of science leaders and explorers. The cooperative agreements support the astrophysics, heliophysics, planetary and Earth divisions of NASA's Science Mission Directorate, which is providing the funding for the activities. "NASA seeks to work with the best of the nation's science and educational communities to help champion and elevate science, technology, engineering, and mathematics," said Paul Hertz, chief scientist of the Science Mission Directorate at NASA Headquarters in Washington. "Stimulating and informative activities, along with experiences created and executed by experts, inspire our future scientists. This provides a productive return on the public's investment for future scientific research." These activities contribute to NASA's overall education and outreach efforts through development and dissemination of new educational and outreach products that use the directorate's science discoveries. The agreements provide opportunities for students and educators, citizen scientists and the public to engage in authentic experiences working with NASA and research communities. Activities will include comprehensive public awareness and engagement plans coordinated with NASA, the selected proposers and other institutions nationwide. Selected proposals are:
"Astrophysics Science Education and Public Outreach Forum," Denise Smith, principal investigator, Space Telescope Science Institute in Baltimore, operated by the Association of Universities for Research in Astronomy Planetary Science Education and Public Outreach Forum: "Extending the Coherence and Reach of NASA Planetary Science and SMD Education and Public Outreach," Stephanie Shipp, principal investigator, Lunar and Planetary Institute in Houston, a division of the University Space Research Association

Heliophysics Science Education and Public Outreach Forum: "A Forum to Support Excellence in Heliophysics Education and Public Outreach through Sustained Collaboration," Bryan Mendez, principal investigator, University of California, Berkeley

Earth Science Education and Public Outreach Forum: "Building a Cohesive and Effective Community," Theresa Schwerin, principal investigator, Institute for Global Environmental Strategies in Arlington, Va. Each selected proposer will receive approximately $850,000 per year. Further funding will be provided after NASA review and subsequent approval of progress reports.

This opportunity was open to U.S. organizations, including NASA centers, industry, educational institutions, not-for-profit organizations, federally funded research and development centers, and other government agencies. Fourteen proposals were received in response to the January 2009 announcement. A peer review panel of education and public outreach professionals evaluated each proposal. NASA's Science Mission Directorate has a diverse portfolio of education and public outreach investments and activities in higher education, elementary and secondary education, informal education, and outreach.

For information about NASA science programs and activities, visit:
http://nasascience.nasa.gov

For information about NASA's Education programs, visit:
http://www.nasa.gov/education

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Tuesday, 23 June 2009

Lunar orbit for NASA LRO

NASA Lunar Mission Successfully Enters Moon Orbit

GREENBELT, Md. -- After a four and a half day journey from the Earth, the Lunar Reconnaissance Orbiter, or LRO, has successfully entered orbit around the moon. Engineers at NASA's Goddard Space Flight Center in Greenbelt, Md., confirmed the spacecraft's lunar orbit insertion at 6:27 a.m. EDT Tuesday. During transit to the moon, engineers performed a mid-course correction to get the spacecraft in the proper position to reach its lunar destination. Since the moon is always moving, the spacecraft shot for a target point ahead of the moon. When close to the moon, LRO used its rocket motor to slow down until the gravity of the moon caught the spacecraft in lunar orbit. "Lunar orbit insertion is a crucial milestone for the mission," said Cathy Peddie, LRO deputy project manager at Goddard. "The LRO mission cannot begin until the moon captures us. Once we enter the moon's orbit, we can begin to buildup the dataset needed to understand in greater detail the lunar topography, features and resources. We are so proud to be a part of this exciting mission and NASA's planned return to the moon." A series of four engine burns over the next four days will put the satellite into its commissioning phase orbit. During the commissioning phase each of its seven instruments is checked out and brought online. The commissioning phase will end approximately 60 days after launch, when LRO will use its engines to transition to its primary mission orbit. For its primary mission, LRO will orbit above the moon at about 31 miles, or 50 kilometers, for one year. The spacecraft's instruments will help scientists compile high resolution, three-dimensional maps of the lunar surface and also survey it at many spectral wavelengths. The satellite will explore the moon's deepest craters, examining permanently sunlit and shadowed regions, and provide understanding of the effects of lunar radiation on humans. LRO will return more data about the moon than any previous mission. For more information about the LRO mission, visit:
http://www.nasa.gov/lro

Friday, 19 June 2009

Launch Lunar Impactor

NASA Successfully Launches Lunar Impactor

CAPE CANAVERAL, Fla. -- NASA successfully launched the Lunar Crater Observation and Sensing Satellite, or LCROSS, Thursday on a mission to search for water ice in a permanently shadowed crater at the moon's south pole. The satellite lifted off on an Atlas V rocket from Cape Canaveral Air Force Station, Fla., at 5:32 p.m. EDT, with a companion mission, the Lunar Reconnaissance Orbiter, or LRO. LRO safely separated from LCROSS 45 minutes later. LCROSS then was powered-up, and the mission operations team at NASA's Ames Research Center at Moffett Field, Calif., performed system checks that confirmed the spacecraft is fully functional. LCROSS and its attached Centaur upper stage rocket separately will collide with the moon at approximately 7:30 a.m. on Oct. 9, 2009, creating a pair of debris plumes that will be analyzed for the presence of water ice or water vapor, hydrocarbons and hydrated materials. The spacecraft and Centaur are tentatively targeted to impact the moon's south pole near the Cabeus region. The exact target crater will be identified 30 days before impact, after considering information collected by LRO, other spacecraft orbiting the moon, and observatories on Earth. "LCROSS has been the little mission that could," said Doug Cooke, associate administrator for NASA's Exploration Systems Mission Directorate at NASA Headquarters in Washington. "We stand poised for an amazing mission and possible answers to some very intriguing questions about the moon." The 1,290-pound LCROSS and 5,216-pound Centaur upper stage will perform a swing-by maneuver of the moon around 6 a.m. on June 23 to calibrate the satellite's science instruments and enter a long, looping polar orbit around Earth and the moon. Each orbit will be roughly perpendicular to the moon's orbit around Earth and take about 37 days to complete. Before impact, the spacecraft and Centaur will make approximately three orbits. On the final approach, about 54,000 miles above the surface, LCROSS and the Centaur will separate. LCROSS will spin 180 degrees to turn its science payload toward the moon and fire thrusters to slow down. The spacecraft will observe the flash from the Centaur's impact and fly through the debris plume. Data will be collected and streamed to LCROSS mission operations for analysis. Four minutes later, LCROSS also will impact, creating a second debris plume. "This mission is the culmination of a dedicated team that had a great idea," said Daniel Andrews, LCROSS project manager at Ames. "And now we'll engage people around the world in looking at the moon and thinking about our next steps there." The LCROSS science team will lead a coordinated observation campaign that includes LRO, the Hubble Space Telescope, observatories on Hawaii's Mauna Kea and amateur astronomers around the world. Ames manages LCROSS and also built the instrument payload. Northrop Grumman in Redondo Beach, Calif., built the spacecraft.

The LCROSS mission is providing updates via @LCROSS_NASA on Twitter. To follow, visit:
http://www.twitter.com/lcross_nasa

NASA Moon Return

NASA Returning to the Moon with First Lunar Launch in a Decade

GREENBELT, Md. -- NASA's Lunar Reconnaissance Orbiter launched at 5:32 p.m. EDT Thursday aboard an Atlas V rocket from Cape Canaveral Air Force Station in Florida. The satellite will relay more information about the lunar environment than any other previous mission to the moon. The orbiter, known as LRO, separated from the Atlas V rocket carrying it and a companion mission, the Lunar Crater Observation and Sensing Satellite, or LCROSS, and immediately began powering up the components necessary to control the spacecraft. The flight operations team established communication with LRO and commanded the successful deployment of the solar array at 7:40 p.m. The operations team continues to check out the spacecraft subsystems and prepare for the first mid-course correction maneuver. NASA scientists expect to establish communications with LCROSS about four hours after launch, at approximately 9:30 p.m. "This is a very important day for NASA," said Doug Cooke, associate administrator for NASA's Exploration Systems Mission Directorate in Washington, which designed and developed both the LRO and LCROSS missions. "We look forward to an extraordinary period of discovery at the moon and the information LRO will give us for future exploration missions." The spacecraft will be placed in low polar orbit about 31 miles, or 50 kilometers, above the moon for a one year primary mission. LRO's instruments will help scientists compile high resolution three-dimensional maps of the lunar surface and also survey it at many spectral wavelengths. The satellite will explore the moon's deepest craters, exploring permanently sunlit and shadowed regions, and provide understanding of the effects of lunar radiation on humans. "Our job is to perform reconnaissance of the moon's surface using a suite of seven powerful instruments," said Craig Tooley, LRO project manager at NASA's Goddard Space Flight Center in Greenbelt, Md. "NASA will use the data LRO collects to design the vehicles and systems for returning humans to the moon and selecting the landing sites that will be their destinations." High resolution imagery from LRO's camera will help identify landing sites for future explorers and characterize the moon's topography and composition. The hydrogen concentrations at the moon's poles will be mapped in detail, pinpointing the locations of possible water ice. A miniaturized radar system will image the poles and test communication capabilities. "During the 60 day commissioning period, we will turn on spacecraft components and science instruments," explained Cathy Peddie, LRO deputy project manager at Goddard. "All instruments will be turned on within two weeks of launch, and we should start seeing the moon in new and greater detail within the next month." "We learned much about the moon from the Apollo program, but now it is time to return to the moon for intensive study, and we will do just that with LRO," said Richard Vondrak, LRO project scientist at Goddard. All LRO initial data sets will be deposited in the Planetary Data System, a publicly accessible repository of planetary science information, within six months of launch. Goddard built and manages LRO. LRO is a NASA mission with international participation from the Institute for Space Research in Moscow. Russia provides the neutron detector aboard the spacecraft.

The LRO mission is providing updates via @LRO_NASA on Twitter. To follow, visit:
http://www.twitter.com/lro_nasa

Wednesday, 17 June 2009

The Countdown has Begun

Lunar Exploration Missions Roll to Pad for Thursday Launch

WASHINGTON -- NASA's Lunar Reconnaissance Orbiter, or LRO, and the Lunar Crater Observation and Sensing Satellite, or LCROSS, rolled aboard their Atlas V rocket to the launch pad at Cape Canaveral Air Force Station in Florida Wednesday morning in preparation for launch on Thursday. The spacecraft left its processing facility at 10:02 EDT and arrived at the pad about 35 minutes later. The spacecraft are scheduled to lift off together on Thursday, June 18, with three attempts possible at 5:12 p.m., 5:22 p.m. and 5:32 p.m. If launch slips to Friday, June 19, the launch opportunities would be 6:41 p.m., 6:51 p.m. and 7:01 p.m. LRO is scheduled for a one-year exploration mission at a polar orbit of about 31 miles, or 50 kilometers, the closest any spacecraft has orbited the moon. Its primary objective is to conduct investigations to prepare for future explorations of the moon. LCROSS will search for water ice on the moon by sending the spent upper-stage Centaur rocket to impact part of a polar crater in permanent shadows. LCROSS will fly into the plume of dust left by the impact and measure the properties before also colliding with the lunar surface. NASA TV coverage of the launch will begin at 2 p.m. June 18.

For information about NASA TV streaming video, downlink and schedule information, visit:
http://www.nasa.gov/ntv

STS-127 Endeavour Problems

Fuel Leak Again Postpones Launch of Space Shuttle Endeavour

CAPE CANAVERAL, Fla. -- NASA postponed the launch of space shuttle Endeavour's STS-127 mission Wednesday because of a leak associated with the gaseous hydrogen venting system outside the shuttle’s external fuel tank. Endeavour's next launch opportunity is July 11. This date comes after the end of an orbital sun-angle condition called a beta angle cut-out, which occurs between June 22 and July 10. The cut-out creates a thermal condition that prohibits shuttle and space station docked operations.The gaseous hydrogen venting system is used to carry excess hydrogen safely away from the launch pad. Wednesday's leak is similar to one that prevented Endeavour's launch on June 13.The 16-day mission to the International Space Station will feature five spacewalks and complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. Astronauts will attach a platform to the outside of the Japanese module that will allow experiments to be exposed to space.

Monday, 15 June 2009

STS-127 Mission Update

June 15, 2009

NASA Sets New Launch Dates for Space Shuttle, LRO and LCROSS


CAPE CANAVERAL, Fla. -- NASA managers have scheduled the next launch attempt of space shuttle Endeavour's STS-127 mission for 5:40 a.m. EDT on Wednesday, June 17. The launch will take place at NASA's Kennedy Space Center in Florida. As a result, the Lunar Reconnaissance Orbiter, or LRO, and Lunar Crater Observation and Sensing Satellite, or LCROSS, are set to lift off together aboard an Atlas V rocket on Thursday, June 18. There are three launch opportunities from Cape Canaveral Air Force Station in Florida: 5:12 p.m., 5:22 p.m. and 5:32 p.m. NASA managers postponed Endeavour's planned June 13 liftoff because of a leak associated with the gaseous hydrogen venting system outside the shuttle's external fuel tank. The system is used to carry excess hydrogen safely away from the launch pad. The LRO and LCROSS launch was moved to June 18 to accommodate Endeavour's June 17 liftoff. If Thursday's liftoff of LRO and LCROSS is postponed 24 hours, the launch times Friday are 6:41 p.m., 6:51 p.m. and 7:01 p.m. Saturday's opportunities are 8:08 p.m., 8:18 p.m. and 8:28 p.m. Endeavour's 16-day STS-127 mission to the International Space Station will feature five spacewalks and complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. Astronauts will attach a platform to the outside of the Japanese module that will allow experiments to be exposed to space. LRO is scheduled for a one-year exploration mission at a polar orbit of about 31 miles, or 50 kilometers, the closest any spacecraft has orbited the moon. The primary objective of LRO is to conduct investigations to prepare for future explorations of the moon. Launching with LRO is LCROSS, a partner mission that will search for water ice on the moon by sending the spent upper-stage Centaur rocket, about the size of a sports utility vehicle, to impact part of a polar crater in permanent shadows. LCROSS will fly into the plume of dust left by the impact and measure the properties before also colliding with the lunar surface. Live updates to the NASA News Twitter feed will be added throughout the shuttle mission and landing. To access the NASA News Twitter feed, visit:
http://www.twitter.com/nasa The STS-127 mission commander, Mark Polansky, has a Twitter account named Astro_127, and can be followed online at:
http://www.twitter.com/Astro_127

STS-127 Souvenirs and Collectables

Sunday, 14 June 2009

STS-127 Launch Delay

June 13, 2009

NASA Postpones Launch of Space Shuttle Endeavour

CAPE CANAVERAL, Fla. -- NASA postponed space shuttle Endeavour's launch to the International Space Station on Saturday because of a leak associated with the gaseous hydrogen venting system outside the shuttle’s external fuel tank. The system is used to carry excess hydrogen safely away from the launch pad. Managers scrubbed the launch for at least 96 hours. The earliest the shuttle could be ready to launch is June 17. However, there is a conflict on the Eastern Range that date with the scheduled launch of the Lunar Reconnaissance Orbiter/Lunar Crater Observation and Sensing Satellite. Mission managers will hold a meeting at 2 p.m. EDT Sunday to discuss the repair options and Endeavour's launch opportunities. A news conference will follow the meeting and air on NASA Television and the agency’s Web site. The 16-day mission will feature five spacewalks and complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. Astronauts will attach a platform to the outside of the Japanese module that will allow experiments to be exposed to space. The STS-127 crew members are Commander Mark Polansky, Pilot Doug Hurley and Mission Specialists Dave Wolf, Christopher Cassidy, Tom Marshburn, Tim Kopra and Canadian Space Agency astronaut Julie Payette. Kopra will join the space station crew and replace Japanese astronaut Koichi Wakata. Wakata will return to Earth on Endeavour to conclude a three-month stay at the station. Polansky, who has a Twitter account named Astro_127, can be followed online at:
http://www.twitter.com/Astro_127 For information about NASA TV streaming video, downlink and schedule information, visit:
http://www.nasa.gov/ntv For the latest information about the STS-127 mission and its crew, visit:
http://www.nasa.gov/shuttle For information about the International Space Station, visit:
http://www.nasa.gov/station

Thursday, 11 June 2009

Ares X-1

NASA's Ares I-X Rocket Achieves Historic Hardware Milestones

CAPE CANAVERAL, Fla. -- NASA's Constellation Program reached two major processing milestones this week as two new pieces of Ares I-X hardware were transferred for final assembly in preparation for the first flight test of the rocket later this summer at NASA's Kennedy Space Center in Florida. Once stacking operations begin later this month, it will be the first time a new vehicle has been stacked on NASA's Mobile Launch Platform in more than 25 years. The forward assembly, composed of the forward skirt, forward skirt extension and the frustum, was moved Thursday from Kennedy's Assembly Refurbishment Facility, or ARF, to the Vehicle Assembly Building for stacking operations. The aft skirt was moved Monday from the ARF to the Rotation Processing and Surge Facility to be attached to the aft motor segment, forming the aft assembly. The assembly will next move to the Vehicle Assembly Building for stacking on the Mobile Launcher Platform. The Ares I-X rocket is a combination of existing and simulator hardware that will resemble the Ares I crew launch vehicle in size, shape and weight. It will provide valuable flight data to guide the final design of the Ares I, which will launch astronauts in the Orion crew exploration vehicle. "This is a very exciting week for the team to have the hardware moving out of the ARF, showing how much progress we've made and that we are that much closer to launch," said NASA Ares I-X mission manager Bob Ess of NASA's Johnson Space Center in Houston. The flight test of the Ares I-X will bring NASA one-step closer to its Constellation Program's exploration goals of returning humans to the moon for sustained exploration of the lunar surface and missions to destinations beyond. The forward assembly connects the 12-foot diameter first stage motor to the 18-foot diameter upper stage simulator. Weighing more than 40,000 pounds, the assembly houses three newly designed descent parachutes for first stage recovery. The aft skirt, which is used at the bottom of the Solid Rocket Boosters for the Space Shuttle Program, was modified over the last year and a half for use on Ares I-X. Some modifications include adding deceleration and tumble motors, avionics and a controller for the auxiliary power unit. "This week is the culmination of tremendous hard work and dedication by the entire NASA and contractor team," said Joe Oliva, first stage program manager for the Ares I-X at ATK Space Systems in Salt Lake City. "These milestones are leading us to a flight test later this year that will provide our proof of concept data for NASA's next generation of launch vehicles." United Space Alliance, of Houston, under a subcontract to ATK completed the processing and integration of the forward assembly and aft skirt. ATK is NASA's prime contractor for the first stage of the Ares I rocket. Video B-roll of the arrival of the Ares I-X hardware will be available on NASA Television's Video File feed. For NASA TV streaming video, schedules and downlink information, visit:

http://www.nasa.gov/ntv

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