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Moon Had Magnetic Field At Least a Billion Years Longer Than Thought, Says Study (theguardian.com)
While the moon has no global magnetic field nowadays, it did have one in the past and researchers believe it lasted at least a billion years longer than previously thought. The Guardian reports: Between 4.25 billion and 3.56 billion years ago, the lunar magnetic field was similar to that of the Earth. The field is thought to have been generated by the churning movement of fluids within the moon's molten core -- a sort of lunar dynamo. But scientists have long puzzled over when the magnetic field disappeared, with previous research unable to tell whether the field had disappeared completely by 3.19 billion years ago or had lingered on in a weaker form. Writing in the journal Science Advances, Sonia Tikoo, a planetary scientist and co-author of the research from Rutgers University, and colleagues from the University of California, Berkeley and Massachusetts Institute of Technology, describe how they set about unpicking the conundrum by analyzing a lunar rock brought back by the Apollo 15 mission in 1971. The sample contains fragments of basalt that had broken off larger rocks. According to a dating technique based on the ratio of different isotopes of argon, the basalt formed from lava flows about 3.3 billion years ago. These fragments are bound together in the sample by a glassy material, which the team say probably formed when some of the basalt melted following a meteorite impact. The researchers dated the formation of the glassy material to between 1 billion and 2.5 billion years ago. Crucially, the impact also melted iron-containing grains within the basalt. These crystalized again within the glassy material as it quickly cooled, capturing a record of the magnetic field of the moon at that time.
"The upshot, says Tikoo, is that the lunar dynamo was still going until somewhere between one billion and 2.5bn years ago."
Based on crystallized iron-grains in some glassy material, not very precised timing.
"Such a field is 1,000 times stronger than that measured at the moonâ(TM)s Apollo 15 landing site by astronauts, and far stronger than than would be expected from the influence of the Earthâ(TM)s magnetic field."
You are welcome.
Moonsanto
http://humansarefree.com/2015/03/is-moon-artificial-alien-base.html
http://wariscrime.com/new/the-moon-is-a-spacecraft/
"The researchers dated the formation of the glassy material to between 1 billion and 2.5 billion years ago. "
How do you go about dating something that doesn't have carbon, or layers of sediment to compare with? I'm sure there are other methods, but the article doesn't elaborate.
Just another day in Paradise
Wrong. From Merriam-Webster:
: of, relating to, or involving the entire world : worldwide a global system of communication; also : of or relating to a celestial body (such as the moon)
emphasis mine
Not widely known, but the popular theory is understood to be complete bullshit, even by the person who created the theory. As what no one is told is that the theory requires an exactly identical collision from the opposite direction and complementary angle to counter the imparted spin of the first collision. Which means, the theory everyone pushes is known to be completely wrong. It's pure fantasy. While plausible, it's pretty much improbable (impossible).
It's sadly comical that such an outlandishly impossible theory is accepted by mainstream. Really speaks to the sickness which has overtaken science and the peer review process.
"Moon Had Magnetic Field At Least a Billion Years Longer Than Thought"
But wait! How long is thought?
Garry Knight
""Global" refers to Earth,"
No. global refers to things which are globes, including the earth.
The adjective that refers exclusively to the earth is "terrestrial"
Why should we think you're judgement of science be right if
Why should we care about either of you if you both post as Anonymous Coward? If there really ARE two of you!
So, just how long has the Moon been sentient?
I am the unwilling control for my Origin.