About 16 hours before 2012 DA14 edit
The Chelyabinsk meteor and 2012 DA14. Is there anyone who believes it, that these two events are uncorrelated?
I don't. Two events, each occuring about once in a hundred years
happen within one day in 16 hours, NEVER EVER!
And indeed, it's more than doubtful, that the velocity of the meteor was as high as 19 km/s. There is obviously no evidence for that "observation". In fact it's velocity was only slightly higher than the escape velocity of 11.2 km/s, proving that the meteor came from an oribt similar to Earth's orbit around the Sun like 2012 DA14.
Very likely the meteor was distracted as he passed by the Earth in 2012 together with 2012 DA14, but in some distance. That's why the oribts differ a little.
Magnetic field of the Earth and the planets edit
All popular theory to explain the magnetic field of a planet are wrong, because there is no known theory able to explain the obvious connection with the rotation, including why the direction of rotation and field approximately match. The rotation of the planet is obviously the cause of the magnetic field. Popular theory not even explain the polarity of the field. Despite the lack of evidence, outlandish theories about the magnetic pole reversals are common. In fact, the polarity is clear from the rotation and can therefore cannot change.
The correct explanation is actually surprisingly easy. The cause is simply the electric current generated directly by the rotation of the planets, and the charge separation of free ions by gravity. Positively charged ions are usually heavier than negative charged ions and are therefore shifted to the rotation axis.
We first consider only the negative charges, the electrons, of the Earth, neglecting the positive charges of the atomic nuclei. In 24 hours the total charge of the electrons crosses once through a cross section of the Earth. The mass of the Earth is at first approximation two times the mass of the protons, since there are about as many neutrons almost as heavy.
Then the current caused by the rotation of the electrons around the axis of the Earth within 24 hours is easy to calculate.
Since the Earth is electrically neutral overall, a current of exactly equal magnitude is produced by positive charges. The magnetic fields generated by both currents cancel each other almost completely. But, since the positively charged ions, however, are slightly shifted by gravity towards Earth's axis, the remaining effect of the negative charges causes Earth's magnetic field. Franz Scheerer (Olbers) (talk) 11:30, 4 November 2013 (UTC)