Moon may be shrinking, but very, very slowly
2010-08-20 0:00

By Randolf E. Schmid | MetroNews.ca



The moon may be shrinking but it will not be disappearing any time soon.

New research indicates cracks in the moon’s crust that have formed as the interior has cooled and shrunk over the last billion years or so. That means the surface has shrunk, too, though not so anyone would notice just from gazing at it.

Scientists have identified 14 landforms called lobate scarps scattered over the surface of the moon, explained Thomas R. Watters of the Center for Earth and Planetary Studies at the Smithsonian’s National Air and Space Museum.

Watters and colleagues describe their find in Friday’s edition of the journal Science.

The scarps had previously been noted at the moon’s equator, but this is the first evidence in other areas, indicating they result from a global process.

The study calls the scarps "evidence of recent thrust faulting on the moon." But this is planetary science, where "recent" can mean a billion years ago.

The scarps, or cliffs, extend across some small craters, and small craters tend to be obliterated over time, Watters explained in a telephone interview. In addition, there are no large craters imposed on top of the scarps, another indication they are relatively recent, in planetary terms, he said.

"One of the really cool parts of this ... the faults are so young-looking that you can’t escape the possibility that this contraction occurred recently, and could indicate that the moon is still active," Watters said.

The size of the scarps indicates a shrinkage in the size of the moon of about 100 metres (328 feet), which would not be nearly enough to be noticed with the naked eye. The moon is about one-fourth the size of the Earth in diameter.

The scarps range up to 10 metres (a little over 30 feet) high and a few kilometres long, he said. By comparison, the planet Mercury has much larger scarps indicating considerably more shrinkage over time.

The moon’s not going to disappear and its shrinkage will not affect the Earth in any way, Watters stressed.

Article from: MetroNews.ca



Related Articles
Moon’s Shell May Be Wet, But Inside Is Bone Dry
Subterranean Living May Await Moon And Mars Colonists
There’s a Monolith on Mars Moon, Phobos
Every nation received a moon rock — some of them can’t find it, (some of them were fake)
Japan sees Moonwalking Humanoids by 2015


Latest News from our Front Page

Galaxy Poll: 86 per cent of Australians want childhood vaccination to be compulsory?
2015-04-17 23:33
Australians want Prime Minister Tony Abbott to make childhood vaccination compulsory and close loopholes that allow vaccine refusers to put all children at risk. An exclusive national Galaxy poll commissioned by The Sunday Telegraph has revealed overwhelming support to ensure every child is vaccinated. The highest support for compulsory jabs is in South Australia, where 90 per cent support the call. The poll ...
Eye in the sky: Local police now using drones to spy on citizens
2015-04-17 22:09
The Harris County Precinct 1 Constable's Office is doing something that no other agency in Harris County is believed to have done yet: Use drones to help fight crime. It's an eye in the sky for law enforcement, without giving up the element of surprise. "It could absolutely save lives," says Constable Alan Rosen. Rosen says the agency's two new $1,200 drones, which ...
New Zealander of the Year: refuse vaccines, lose money
2015-04-17 22:47
Following in the footsteps of Australia, 2014 New Zealander of the Year, Dr. Lance O’Sullivan, wants to punish people who don’t get vaccinated. The New Zealand Herald (4/15) reports: “A leading New Zealand doctor has called on the Government to follow Australia’s example to cut child welfare payments to families who do not vaccinate their children, saying the policy would help protect ...
Iris Scanner Identifies a Person 40 Feet Away
2015-04-17 22:20
Police traffic stops are in the news again, tragically, sparking a new round of discussion on whether and how to outfit police with cameras and other technology. For several years now, researchers at Carnegie Mellon University’s CyLab Biometrics Center have been testing an iris recognition system that can be used to identify subjects at a range of up to 40 feet. Like ...
Yes, You Can Catch Insanity
2015-04-17 22:29
One day in March 2010, Isak McCune started clearing his throat with a forceful, violent sound. The New Hampshire toddler was 3, with a Beatles mop of blonde hair and a cuddly, loving personality. His parents had no idea where the guttural tic came from. They figured it was springtime allergies. Soon after, Isak began to scream as if in pain ...
More News »