Space

December 19, 2012

Lockheed Martin, NASA de-orbit twin Grail spacecraft into Moon

NASA’s Gravity Recovery And Interior Laboratory mission came to an end today as planned when the Lockheed Martin and the Jet Propulsion Laboratory flight operations team commanded the two spacecraft to de-orbit and impact the surface of the moon.

Lockheed Martin built the twin robotic spacecraft and conducted flight operations for NASA’s JPL since their launch on Sept. 10, 2011.

The first of the orbiters, Ebb, impacted a predetermined mountain near the lunar north pole at 3:28 p.m., MST, with its twin, Flow, hitting nearby 30 seconds later. Both were traveling at 3,760 mph.

Following a successful primary and secondary science mission of mapping the gravity of the moon, the washing machine-sized spacecraft were nearly out of fuel. JPL and Lockheed Martin worked together to send both spacecraft to the surface in a controlled manner at a known location.

“During this extended science campaign, the orbits were reduced to astonishing low altitudes. In some instances, the spacecraft flew less than 1.25 miles above the lunar topography,” said Stu Spath, GRAIL program manager at Lockheed Martin Space Systems Company. “These low trajectories have provided increased science visibility into the moon’s impact craters and other crustal features. Today marks a bittersweet end to a great mission.”

The GRAIL primary mission yielded the highest-resolution gravity field map of any celestial body. Future gravity field models developed from data collected during the extended mission will be of even higher resolution. The map will provide a better understanding of how the moon, Earth and other terrestrial planets in the solar system formed and evolved.

NASA’s Jet Propulsion Laboratory, Pasadena, Calif., manages the GRAIL mission. The Massachusetts Institute of Technology, Cambridge, is home to the mission’s principal investigator, Dr. Maria Zuber. The GRAIL mission is part of the Discovery Program managed at NASA’s Marshall Space Flight Center in Huntsville, Ala.

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines January 30, 2015

News: Taliban claims responsibility for attack on Americans at military base near airport - The Taliban claimed responsibility Jan. 30 for a shooting incident at a military base attached to Kabul’s international airport yesterday that killed three American civilian contractors and an Afghan national, saying the attacker had infiltrated the ranks of the security forces. Commission...
 
 

News Briefs January 30, 2015

Military judge weighs restrictions on Gitmo female guards A military judge is deciding whether to continue restricting the use of female guards at Guantanamo. Navy Capt. J. Kirk Waits heard closing arguments Jan. 29 at the base in Cuba during a pretrial hearing for Abd al-Hadi al-Iraqi. Waits didn’t say when he will rule. Hadi...
 
 
Air Force photograph by 1st Lt. Jake Bailey

Cope South experts exchange knowledge, techniques

Air Force photograph by 1st Lt. Jake Bailey TSgt. Sam Bishop, center left, and SSgt. Jeffrey Stephens discuss propeller maintenance with Bangladesh air force maintainers, from the 101st Special Flying Unit, during exercise Cope...
 

 

Air Force names 2-star to lead F-35 Integration Office

With the initial operating capability date of the F-35 Lightning II quickly approaching, the Air Force appointed Maj. Gen. Jeffrey Harrigian as the director of a larger Air Force F-35 Integration Office, Feb. 1. In addition to gaining new leadership, the F-35 Integration Office will also grow from a staff of four to 12 and...
 
 
boeing-ana2

Boeing announces ANA’s commitment to more jetliners

Airline continues fleet modernization with Boeing airplanes Boeing and All Nippon Airways announced Jan. 30 the airline’s intent to purchase three 787-10 Dreamliners to add additional flexibility to the airline’s 787 fleet....
 
 
Air Force photograph by Scott M. Ash

Air Force risks becoming too small to succeed under sequestration

Air Force photograph by Scott M. Ash Air Force Chief of Staff Gen. Mark A. Welsh III testifies before the Senate Armed Services Committee Jan. 28, 2015, in Washington, D.C., as Commandant of the Marine Corps Gen. Joesph F. Dunf...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>