I an looking at a LARGE contrail in the shape of a perfect "X" Does the shape mean anything?
540627
Not an uncommon thing to see. The "sky" is laid out in compass points and most commercial air craft are assigned flight paths that are like "high ways" in the sky. Generally you will find those "trails" are on true points, 00%,45%,90% etc. The reason for the near perfect "X" is due to the vectors the two were heading on.
57491
because of gravity, pulling inward with the same force in all directions, giving them a round shape.\n\nyou look very pretty in your avatar by the way ;)
1111034
Perhaps the link will help a little.  If you bend a pipe or metal bar, some of the metal will be in tension (stretched) and some will be in compression (squeezed).  There is a neutral plane between the two conditions that is neither stretched nor squeezed.  Often the plane passes through the centroid of the pipe (or bar).  This is easy to find if the cross-section is regular (round, square, etc.) but more difficult to find if the area is irregular or of variable properties such as density.  The centroid is similar to the center of gravity for the shape.  Hope that helps a little.
746100
The position of the arrow and the cross on the circle helps explain their meaning. The symbol for female (Venus) is a circle placed above a cross, while the symbol for male (Mars) is a circle with an arrow pointing upwards (to the right).\n\nA cross with a circle at the top represents the rise of spirit over matter. Considered a feminine quality, this represents female energy.\n\nA circle with an arrow pointing upward indicates matter in supremacy over spirit. Considered a masculine quality, this represents male energy.
722697
The shape is completely random, based on how air currents (wind and updrafts) are moving around and inside the cloud. You get so many cloud shapes over time that a few random patterns are bound to resemble something else we're familiar with, such as a heart or a dog.
935181
In all my years as a mathematician, I have never come across a symbol to denote "skew lines."  There may BE one, but I have never seen it.  Nor would it be a particularly helpful symbol, in my opinion, since "most" lines are skew...the symbols appear to be reserved for "special cases" (e.g. coplanar, parallel lines).\n\nBe sure to visit the link below for greater insight.\n\nHope this helps!
988242
well, its not exactly round, its spherical. but yeah, since you can only see it from one side at a time, if you saw it from space it would appear round. kinda like how the sun appears to us. it looks like its moving, but its not, WE ARE. lol.
273057
The cross symbol could denote matter, and the u shaped symbol could be denoting a boat or a convergence.  Perhaps it is simply stating that the can is a conveyance of matter?  OR it is saying the can is a matter boat.\n\nA more practical approach might be that it is simply an attention seeking, mnemonic activating device for marketing purposes.
112412
Hard to say form such a vague descrition. As omegawulf666 says, they could be jet contrails if you are only seeing one at a time. \n\nOr you could be referring to radiatus clouds, which form multiple parallell lines (although they often seem to converge on the horizons, like train tracks).\n\nThe one thing they defintitely are not are jet streams. A jet stream is a type of wind. You can't see wind.
449462
The movie trailer for X3 has a pair of vertical angles in the X.  Also, the Volkswagen kinda has vertical angles (although the vertices aren't shared, so technically it isn't a pair of vertical angles, but it looks close).  Ads for Exxon will work too.
1183303
Not quite. It's shaped like a pear. We call it a Geoid.
735129
they would look like cross (X).. the sin(-x) graph loos like  / and     -sinx would look like &#92;. \n\nIf you dont get it please visit this figure uploaded on my webpage\n\nhttp://www2.lut.fi/~vasava/untitled.jpg.
964062
Hi. It is bent at any height above zero. Look at the horizon from a spacecraft and you'll see this. The bending gets reduced as you approach zero height, at which point it is a flat circle.
1169174
I see a problem.  You seem to be interested in things that the average person doesn't want to hear about.  And you seem to be inspired by some unknown force.  Welcome to the human race.\n\nThere is a mystical significance to shapes; physics states that.  Numbers and letters are shapes.  When you look at a hurricane on the whether forecast you'll notice it creates 6 over and over as in 666.  Perhaps the answer is in the word live, which when spelled backwards creates the word evil.  In the past tense it creates the word devil.  It could be that anything that lives is evil.  \n\nSo, you are of a different kind.  You see things that others can't because you look.  That's a difference right there; most people don't want to look, hear, or think, for fear of what they may find.  That is the state of society, it fears lossing it sins; which can be seen from the outside not from within it.  Elevations!\n\nEnjoy your analytical mind, sometimes it causes the deaf, dumb and blind to see.  However, don't hold anything true until you see it at least in your mind with the proper deducement.
15792
It is that shape because it comes down a long shape tunnel and with pressure. So it is compress together.
498997
If it's really small, it may be a pseudoscorpion.\n\nHere's a pic: http://commons.wikimedia.org/wiki/Image:Ar_1.jpg
519557
look at a roll with design on it. that will reveal your answer, Grasshopper.