Tweet
I have a few minutes, and thought I’d post something positive to kind of wash away all the negative, and give us a fresh perspective on things. First off the great Carl Sagan with his seminal essay Pale Blue Dot
__________________________________
O.k. a N.E.O. is a Near Earth Object and that includes asteroids like 2012 DA14, which was discovered in … drumroll … 2012. Evidently, astronomers aren’t very creative in naming objects in the sky, like they were thousands of years ago ;-) Anyway, 2012 DA14 will pass us within 27,000 km’s, which about twice our own diameter.
Oh noes!!!111
Not really. Watch
More at Bad Astronomy
_____________________________________
So, I’m scrolling through Bad Astronomy and see this video
At about 1:50, that looks like ripples in a pond, seen from below, to me. One of the links given is this one, that says it’s from the shockwave of hypersonic flight. To me, my first thought was what happens when supersonic jets do high speed passes which causes the pressure to drop around the plane which causes a cone-like within the vortex, called the Prandtl-Glauert singularity
Now, check out this video for an example of that
4 Comments
Have to go do some shopping have a good night, all
Much appreciated.
a mote of dust? yeah
just an infinitesimal flash in the pan
the entire collective hubris
the ego of man
rec’d
Yea, it gives us perspective doesn’t it?
PS any mods out there? I was wondering how you put breaks in the post for the preview
!–break– with the greater and lesser signs doesn’t work
Maybe there’s a button I missed? Or is it br with the greater and lesser signs?
VERY kewl post SJ . . . thoroughly fascinating and yes it DID take away some of the bitter from our daily life of a failing corporate fascist existence.
*G*
Great info, I never KNEW about the Sinularity thang, much less pressure drops over wings and canopy to lower temps and CREATE the effect.
Fascinating as all hell. Shared on my FB wall, it was so much fun!
Best to ya hoss, keep yer head low and yer powder dry! *G*