The tilt of the earth is raising questions with scientists.
What kind of questions? Source, please.
1. Since it is now known from satellite observation that the angle of the earth's tilt is increasing over time, what is the maximum angle attainable by the planet?
Current Earth axial obliquity: 23.5 degrees
Range of Earth axial obliquity: 22.1-24.5 degrees
Wiki
We are being told by astronomers that from the earth's perspective the sun will be viewed as being in the center of the Milky Way in December, 2012. Since as a photographer I recognize the word 'perspective' as denoting actual movement of this planet, either in its revolution around the sun or in its angle of rotation, so as to make this view possible, what will be the position of this planet that causes this particular perspective to be possible?
Why does your experience as a photographer offer you a unique perspective on this issue (not an attack, just seeking to understand your perspective)?
As to your question: The position of the planet will be such that the center of the milky way, the sun, and the Earth fall upon a line that describes a ray radial to the center of the galaxy.
Since astronomers are also saying that this same view occurs every 26,000 years, it would be logical to infer from that a progression of the planet itself that has as its result the repeating of the same view. Is this due to a continuing movement of the planet beyond this view, or does this view signal a return of the planet to a prior position on its axis so that the progression toward the 'sun in the center of the Milky Way' point in time begins anew?
It is important to understand that the earth does not follow a circular orbit around the sun (although it is very, very nearly circular). Its orbit is ellipsoid, the
eccentricity of which follows a 100k year cycle. Not only that, but the earth also 'wobbles' on its axis, with variations both in
obliquity (tilt, the angle between the earth's rotational axis and a line perpendicular to its orbital plane) and
precession (a motion in which the earth's axis describes a cone as it rotates through its cycle). It is these motions that control the apparent position of the sun relative the the galaxy center.
The best way to think of this is to imagine the earth as a very large top. You spin the top on a table, and the path it describes on the table is essentially elliptical. As it describes this path, you can also see it wobbling from side to side (tilt). look closer, and you will notice that the top of the top (you know, the little nob you use to spin the thing) describes a cone as it spins (precession).
4. If the view already described is caused by the earth's tilt having reached its maximum point, then are we to expect a gradual reversal of angle so that it returns to its point of origination, or are we to expect, as some believe, that the earth will correct its angle via a planetary 'seizure'? Will this activate the primitive gyroscope that is the metal core of this planet, and cause it to bring the earth back to its point of origination in a more violent manner?
The earth will not have reached its maximum obliquity in 2012. When it does, however, it will simply reach its maximum, and then the tilt angle will begin to decrease. This cycle from maximum tilt to minimum and back to maximum occurs over approximately 42,000 years.
The 'seizure' hypothesis put out by some would require an enormous alteration to the angular momentum of the planet which is not, to my knowledge at least, possible sans outside influence. Such an adjustment would indeed be quite violent, as our personal momentum is similar to that of the planet. If the planet's momentum suddenly shifted, we would all receive quite a jostle.
As to the earth's core as a gyroscope: Gyroscopes work by rotating a mass within an object, which imparts an increased angular momentum to the object, making its direction of motion more difficult to change. The earth's core acting as a gyroscope would imply that it rotates at a different speed than the rest of the earth. I am not aware that this is the case. If i am wrong, please provide a source detailing the core's motion.
Thanks, you too.