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Post Info TOPIC: Gravity Recovery and Interior Laboratory mission
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Lunar probes to resolve mystery of moon's interior

Two robotic NASA probes are due to arrive at the moon this weekend to resolve a long-standing mystery of what is inside Earth's natural satellite and how it got there.
The 303-kg craft of the U.S. space agency's Gravity Recovery and Interior Laboratory, or GRAIL, mission have been flying to the moon since their joint launch in September.
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Blobrana


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Nasa's Grail gravity twins set to orbit Moon

Two twin satellites are due to go into orbit around the Moon this weekend with the intention of mapping its gravity.
Nasa's Grail spacecraft are expected to give scientists remarkable new insights into the internal structure of the lunar body.
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Blobrana


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NASA Twin Spacecraft on Final Approach for Moon Orbit

NASA's twin spacecraft to study the moon from crust to core are nearing their New Year's Eve and New Year's Day main-engine burns to place the duo in lunar orbit.
Named Gravity Recovery And Interior Laboratory (GRAIL), the spacecraft are scheduled to be placed in orbit beginning at 1:21 p.m. PST (4:21 p.m. EST) for GRAIL-A on Dec. 31, and 2:05 p.m. PST (5:05 p.m. EST) for GRAIL-B the next day.
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Blobrana


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NASA's GRAIL Twins to Welcome 2012 at Moon

 
NASA's two Gravity Recovery And Interior Laboratory (GRAIL) spacecraft are closing in on their quarry, the moon. The mission plans New Year's Eve and New Year's Day main engine burns to place the twin spacecraft in lunar orbit.



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Blobrana


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NASA To Host Media Teleconference On Probes' Moon Orbit Insertion
 
NASA will hold a media teleconference at 11 a.m. PST on Wednesday, Dec. 28, to preview twin spacecraft being placed in orbit around the moon on New Year's Eve and New Year's Day.
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Blobrana


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NASA's Moon Twins Going Their Own Way

NASA's Gravity Recovery And Interior Laboratory (GRAIL)-B spacecraft successfully executed its first flight path correction manoeuvre Wednesday, Oct. 5. The rocket burn helped refine the spacecraft's trajectory as it travels from Earth to the moon and provides separation between itself and its mirror twin, GRAIL-A. The first burn for GRAIL-A occurred on Sept. 30.
GRAIL-B's rocket burn took place on Oct. 5 at 11 a.m. PDT (2 p.m. EDT). The spacecraft's main engine burned for 234 seconds and imparted a velocity change of 25.1 meters per second while expending 3.7 kilograms of propellant. GRAIL-A's burn on Sept. 30 also took place at 11 a.m. PDT. It lasted 127 seconds and imparted a 14 meters per second velocity change on the spacecraft while expending 1.87 kilograms of propellant.
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Blobrana


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NASA Invites Students To Name Moon-Bound Spacecraft
 
NASA has a class assignment for U.S. students: help the agency give the twin spacecraft headed to orbit around the moon new names.
The naming contest is open to students in kindergarten through 12th grade at schools in the United States. Entries must be submitted by teachers using an online entry form. Length of submissions can range from a short paragraph to a 500-word essay. The entry deadline is Nov. 11.
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DELTA 2 RB
1 37803U 11046C   11253.59467199 +.00002457 -77678-5 +00000-0 0 00018
2 37803 028.5000 009.1212 0000200 263.4759 096.5843 16.41337653000016


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GRAIL Spacecraft Separation for ships 1 and 2

 

GRAIL launch briefing at Kennedy Space Centre 9.7.11 part 1 of 6



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NASA Launches Mission to Study Moon From Crust to Core

NASA's twin lunar Gravity Recovery and Interior Laboratory (GRAIL) spacecraft lifted off from Cape Canaveral Air Force Station in Florida at 9:08 a.m. EDT (6:08 a.m. PDT) Saturday, Sept. 10, to study the moon in unprecedented detail.
GRAIL-A is scheduled to reach the moon on New Year's Eve 2011, while GRAIL-B will arrive New Year's Day 2012. The two solar-powered spacecraft will fly in tandem orbits around the moon to measure its gravity field. GRAIL will answer longstanding questions about the moon and give scientists a better understanding of how Earth and other rocky planets in the solar system formed.
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