NASA probes crash into moon
2012-12-18 0:00

From: Associated Press




A pair of NASA spacecraft tumbled out of orbit around the moon and crashed back-to-back into the surface on Monday, ending a mission that peered into the lunar interior.

Engineers commanded the twin spacecraft, Ebb and Flow, to fire their engines and burn their remaining fuel. Ebb plunged first, slamming into a mountain near the moon’s north pole. Its twin, Flow, followed about a half minute later and aimed for the same target.


This graphic provide by NASA shows the projected paths into the moon by spacecraft Ebb and Flow. The twin craft on Monday, Dec. 17, 2012, is expected to slam into a lunar mountain near the north pole after nearly a year in orbit.



By design, the final resting place was far away from the Apollo landing sites and other historical spots on the moon.

After the double impacts, mission chief scientist Maria Zuber of the Massachusetts Institute of Technology said the spot has been named after team member Sally Ride, the first American woman in space, who died earlier this year.

"It’s really cool to know that when you look up now at the moon there’s this little corner of the moon that’s named after Sally," said Ride’s sister, Rev. Bear Ride, adding that she hoped schoolchildren will be inspired.

Since the crash site was in darkness, the final act was not visible from Earth. The Lunar Reconnaissance Orbiter circling the moon will pass over the mountain and attempt to photograph the skid marks left by the washing machine sized-spacecraft as they hit the surface at 3,800 mph.

After rocketing off the launch pad in September 2011, Ebb and Flow took a roundabout journey to the moon, arriving over the New Year’s holiday on a gravity-mapping mission.

More than 100 missions have been flung to Earth’s nearest neighbor since the dawn of the Space Age including NASA’s six Apollo moon landings that put 12 astronauts on the surface.

The demise of Ebb and Flow comes on the same month as the 40th launch anniversary of Apollo 17, the last manned mission to the moon.

Ebb and Flow focused exclusively on measuring the moon’s lumpy gravity field in a bid to learn more about its interior and early history. After flying in formation for months, they produced the most detailed gravity maps of any body in the solar system.

Secrets long held by the moon are spilling out. Ebb and Flow discovered that the lunar crust is much thinner than scientists had imagined. And it was severely battered by asteroids and comets in the early years of the solar system — more than previously realized.

Data so far also appeared to quash the theory that Earth once had two moons that collided and melded into the one we see today.

Besides a scientific return, the mission allowed students to take their own pictures of craters and other lunar features as part of collaboration with a science education company founded by Ride, who died in July of pancreatic cancer at age 61.

Scientists expect to sift through data from the $487 million mission for years.

Obtaining precise gravity calculations required the twins to circle low over the moon, which consumes a lot of fuel. During the primary mission, they flew about 35 miles above the lunar surface. After getting bonus data-collecting time, they lowered their altitude to 14 miles above the surface.

With their fuel tanks almost on empty, NASA devised a controlled crash to avoid contacting any of the treasured sites on the moon. Mission control at the NASA Jet Propulsion Laboratory applauded when controllers lost signal from the spacecraft.

The last time the space agency intentionally fired manmade objects at the moon was in 2009, but it was for the sake of science. The crash was a public relations dud — spectators barely saw a faint flash — but the experiment proved that the moon contained water.



Article from: clarionledger.com












NASA GRAIL Twins Complete Their Moon Impact







Related Articles
NASA’s Apollo Landing Sites ’Off Limits’
Gentlemen...Let’s blow up the moon
NASA moon-mapping mission to come to a crashing end
NASA Launching Twin Moon Probes to Measure Gravity - GRAIL
What was the Holy Grail, and why our centuries-old fascination with it?
NASA’s GRAIL to look inside the moon in 2011
Aubrey de Grey, Artificial Intelligence, Singularity, Longevity and the Holy Grail


Latest News from our Front Page

German Government Evict Poor Germans From Their Homes For Migrant Asylum Seekers
2015-09-03 2:40
This is a video of a report on replacement of poor Germans with Middle Eastern asylum seekers. This was made broudcasted on a German Left-leaning TV station on August 28, 2015. It's original title: The most poor of the poor have to vacate their homes for asylum seekers. Source: youtube.com
Black Lives Matter Radio Host Calls for Killing Whites and Police
2015-09-03 1:48
“It’s open season on killing whites and police officers." A blogtalkradio program associated with the Black Lives Matter movement spewed racist hate and called for a race war Monday, reports Breitbart. The YouTube video of the audio recording has since been removed as a violation of YouTube's policy prohibiting hate speech, but Breitbart has video (below) of the host "King Noble" making the comments, taken from ...
Irish will be an ethnic minority in Ireland by 2050
2015-09-02 22:32
The former President of Dublin City University says that Ireland’s natives will be a minority in the country by the middle of this century... Professor Ferdinand von Prondzynski was referring to unpublished and unidentified United Kingdom based research. Speaking at the conferring ceremony at DCU on Tuesday he said that the Irish in Ireland will be a minority by 2050 while ...
Immigrant Crisis Is the Final Nail in the EU Coffin
2015-09-02 21:23
One of the biggest flaws with the EU, was the idea that they could house dozens of cultures with distinct histories and languages, all under one roof, and expect them to thrive. You can’t hold 28 nations together under one union, when all of these countries have wildly different interests, expectations, and priorities. Every time the EU faces a problem, ...
Three-year-old ultra-Orthodox Jewish children told 'the non-Jews' are 'evil' in worksheet produced by London school
2015-09-02 19:43
Documents seen by The Independent show children are taught about the horrors of the Holocaust when they are still in kindergarten at the Beis Rochel boys’ school in north London. A whistle-blower, who wished to remain anonymous, has shown The Independent a worksheet given to boys aged three and four at the school. In it, children were asked to complete questions ...
More News »