What's that light in the sky?It flicker blue and red and it hasn't moved in hours.?
953702
Sounds like you may be looking at Sirius, the brightest star in the  sky. It is a blue star but because of the refraction of the Earth's atmosphere appears to flash red every few seconds. It doesn't matter where you  are. It's visible this time of year anywhere in the northern hemisphere. BTW Sirius is called the dog star because it is part of the constellation Canis Major, the big dog. Canis Major looks just like a stick drawing of a dog and Sirius is its eye.
990630
Maybe a geosynchronously orbiting satellite. Those are satellites that rotate with the Earth so it appears that they don't move from our perspective.\n\nObviously, anything else (including stars) would move as the night progressed.\n\nHope that helps.
360306
I saw something in the sky, one evening in Central london. It was really weird, this glowing orange disc thing spinning around, it was making a funny humming noise, and just as I pointed it out to my dad, it slowly dissapeared into the night..... It was really weird.
768063
North western sky.? In the USA.? Me and my work mate saw two bright lights in the western sky at 8pm off the coast of western australia. About 2 hours ago. They looked like fireballs and went horizontally then went out of sight. It lasted for about 20 seconds.
173623
light green and sky blue...
66169
The sun's rays hit the Earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. At sunset, the sun's light passes farther through the atmosphere, deflecting and decreasing the blue in the air. Scattering by dust particles and pollution in the air causes the sunset to appear red.
195526
It's the same reason stars twinkle--light traveling through the atmosphere gets distorted and flickers.
827946
When I was 3 years old I saw an object in my front yard very early in the morning before anybody in the neighborhood ever got up. It was about the size of a soccer ball and was shiny gold  in color. It was pulsing up and down about a foot each time. I remember this like it was yesterday (I am now 63 years old). I told my mom about it and when she came to look it shot up in the air at blistering speed and she never got to see it. It came back two more times but she never saw it. It never made a sound. This happened back in 1946 and I will never forget it. I saw another one when I was 19 years old it was at midnight and it flew over my house. It looked like it was on fire. It never made a noise either. Nobody was around at the time so I could show them. I had just got back from a date and everybody was in bed. This is my experience with UFO's.
949120
All you need is eyes and a clear sky. I saw one about an hour ago, but that was after an hour of looking. There should be more later tonight, especially after 11:00 or 12:00. Look anywhere in the sky.
419858
Yes, it was night but me, my mom and my two little sisters saw the silhouette of a black disk in the sky, (it was really close to us) and it had red and green lights going around it. And almost as soon as we saw it it was gone. I know it wasn't an airplane or anything man made.
204272
Light travels faster than sound.
416939
There are chemicals in the air and its just how the light might have been bent. There are tons of different atmospheric problems that could have caused that.
900269
there are defferent sphares of light.   White light comes from the sun and when it hits the atmospher it splits into different colors of the rainbow.  Blue being the fastest light is the only light that escapes the atmospher and that is what makes a blue sky.  Blue skies also mean clear skies.  now a red sky means lots of deferent types of air in the sky.  in the morning the sun is just starting to warm up the atmospher.  so you have a lot of defferent types of air going to get charged up.   Think of it like starting all the appliences  in your kitchen starting up but you don't know what they are gonna do.  basically you get speratic weather.  As apposed to a blue sky getting warmed up.  All it does is warm up the air.    \n \nhope this helps\n-David-
382450
The 'sky' that you see is not of a solid substance, it is merely molecules in the air scattering light. In this case, most of the time a blue light. At night, the sun disappears and you will see space (the sky has 'disappeared' and now you see beyond the sky), while in actual fact the molecules that create the sky are still there, they are not refracting light. \n\nGravity on earth cannot pull any more particles closer to earth and as such the sky remains staticly placed in the sky forever standing.
32338
ya once i think  i saw a strange thing in the sky at 3.00 at night but im not sure
1113645
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light.  When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.\n\n\nBecause the universe is not infinitely old, that puts a limit to how long the\nlight from all those stars can have travelled. So some of the light has not\ngotten here yet. Because stars do die out, that means that their light dies\nout too - which means that we may get the light from some stars at one time,\nand the light from some other stars at a different time, but not all the \nlight\nof all the stars that everywhere put together. Finally, because the \nuniverse is\nexpanding, the light gets weaker before it gets to us. All in all, this means\nthat there is not enough light from all those stars to make any point in \nspace\nbright.
1064938
I see it blue..isn't it??