reply to post by weedwhacker
Weedwhacker, they are not talking about the orbit of the galaxy. They are talking about the motion of the solar system in orbit of the galaxy.
Sol moves up and down while it orbits the MW. Like a wave in a sense, or a ray of radiated particles.
Each 'wave peak' is 33-37 million years. Meaning a 'complete wave' is 66-74 million years. At the current Sol orbital speed of the MW core, each
'wave' occurs 3 to 4 times per complete orbit. In 'disaster' speech, that is 6 to 8 times a POSSIBLE galactic-plane influenced extinction even
could occur in direct relation to the orbit.
"We are located in the outer part of the galaxy, approximately 1.6 × 1017 miles from the Galactic center. At our current orbital speed of 140
miles/second, our solar system takes about 250 million years for one orbit around the Galactic center."
I would of stated that myself from my astronomy books; however a web-source is critical in a forum I guess.
Again, I re-state. The Milkyway is not a perfect disk. Sol does not make a perfect orbit around the Milkyway. This is what we are talking about, the
As for 'its 2012! oh no!' people... I will state this for your food for thought.
The disc's thickness is 1,000-2,000 Light Years thick. Know what this means? At a rate of 140 miles a second, it will take the Solar System around
1400(ish) YEARS to travel ONE light year.
This means, a range of 140,000 years to 280,000 years to go through.
Which means, our ultra-cool super race needs to be on the watch for
asteroids for a very very very very long time. Assuming we go into the disc exactly on 2012, the first thing that will be disturbed is the Oort Cloud
at 50,000 AU out from us.
It takes anywhere from 200 to a million years for Oort Cloud debri to be thrown out of it's orbit, and make its way into the inner solar system.
Even then, it is HIGHLY unlikely that... between Our Star, Jupiter, Nearby Stars, as well as the object in question that would throw our Oort Cloud
out of balance... it is highly unlikely an object would find it's way to earth and be big enough to wipe us out.
As for rouge bodies (not planetary) that are in large asteroid size, coming in from the outer star system... They will be traveling fast, yes, but
they are being pulled in by the sun, Jupiter, and other high mass planets... Likely a one-way trip as they are caught into and crash into those
bodies... or slung back out into interstellar space.
Consider the size of Earth, and our tiny little gravity field. Now, consider how many paths in a 360 degree open space environment that an asteroid
could come at the Sun from. Now consider that not only Earth is not only very minimum of a target, it is also a small MOVING target at a FAST rate in
comparison to other, larger, easier to hit targets with much higher gravity.
So in the minute chance that something IS coming at us after all the above has been worked around... because it HAS happened before... then, and only
then, will we have to step into action and begin nuking or shooting or towing or what ever that we must do to save our little lives.
However, it is HIGHLY improbable that 2012 will be the day that a large bodied object from interstellar regions or even the outer-solar regions, will
be crashing into us due to the topic of this page.
I also have a lovely reply to an older topic's page as to why 'planet X' can not be here by 2012. That if it was traveling any faster it's
'occurrence rate would be more common, and if any slower that it's occurrence rate would be less common... and that within a specified window it
would HAVE to be as close as Neptune. In short, even Earth sized, WE WOULD SEE IT WITH CIVILIAN EQUIPMENT.
So there is no Planet X on 2012. There is no Asteroid from Extra-Solar depths on 2012. The threat posed by this threads subject, if its a rouge
planet like planet x might be... or if its a 'shot gun' of asteroids... or ANYTHING that this news post might even slightly be related to. Has more
than 100,000 years to happen. Its not going to happen year number one... unless the object we hit is going at 75% or as fast a light speed, in which
even if it is the size of the space shuttle, all life on Earth will be turned to dust instantly.
In short, this topic does not concern me in the least; the odds of the event killing me in my potential 100-ish years of life span are 1 in 1400
(assuming one is destined to hit, no questions asked, in the lower base number of 140,000).
Any questions? Ill be glad to put down any more nonsense and panic. It's best to remain calm and think things through with a little research...
rather than selling the farm and burning the bridge.