Open Question: Why does planet earth's sky appear to be the color blue?
When you look at the sun, it's yellowish because you are looking at it head on.
When you look at the sky, you are looking at indirect light. That is light that is coming in perpendicular to your sight and then it scatters in the perpendicular direction (towards your eye).
Longer wavelengths scatter more forward (i.e. when you look directly at the sun) and shorter wavelengths scatter more in the perpendicular direction (i.e. when you look away from the sun at the sky).
Therefore more blue light scatters in the perpendicular direction and more red light scatters in the forward direction.
You can read this wiki article for more details:
http://en.wikipedia.org/wiki/Rayleigh_scattering
Edit:
Conversely, this also explains the red when the sun is setting/rising. When you see the sun setting, the sun's light has to go through A LOT of the atmosphere, since you're seeing mostly the forward scattering you see more red/orange (longer wavelengths).
Open Question: why cant i see planet x and its now 2011?
There is absolutely no scientific evidence supporting Nibiru. Even the writer who supposedly wrote about Nibiru denies that he ever mentioned this in his work.
Open Question: physics, astrophysics?? Would a shift of weight from one planet to another nearby planet( E.g. from Mars to Ea?
notmy realname Member since:November 14, 2010Total points:368 (Level 2)Would a shift of weight from one planet to another nearby planet( E.g. from Mars to Earth) cause a change in the orbit of either planet? My question pertains to the idea of scavenging other planets for resources and bring them to this planet on a large scale. Would the shift of weight of such a great magnitude change the orbit of either planet or their rotations?Answer QuestionBe the first to answer this question.
Open Question: What could an alien do to adapt on a made up planet?
tom Member since:March 27, 2011Total points:95 (Level 1)I am trying to make up a short description of an alien I made up myself and it has to deal with how this alien can adapt to this planet, like how it survives and what it eats. I also need to know what that planet could be made up of for the alien to adapt to it in that way.Answer QuestionBe the first to answer this question.
