why can we stare at the sun and not hurt our eyes during sunset?
110806
It's never a good idea to stare directly at the sun, regardless whether it hurts or not.  At sunset, light from the sun has to pass through more of Earth's atmosphere, especially more of the lower atmosphere, which contains more water vapor and dust.  The light having to travel through more of these impuritites loses some of its intensity (as well as to take on many of the various colors visible at sunset).  That is why looking at the sun is less painful as it sets.
826620
everything which is living or gets energy from a star in our case the sun since the uv rays or blocked and we get only the filtered sun rays though too much into this we will hurt ourselves as everything is good only if taken in a limited quantity same here it really does work as it illuminates you're whole body as a matter of fact one of the main things and most essential thing that you get from the sun is vitamin c and this is got merely standing in the sun but while doing exercise with regard to the sun such as in yoga surya yoga as you have said does touch upon it,it acclerates protein development in you're body should not be in noon it should be done either in the wee hours of morning or while the sun is mild in the evening it helps in body proteins and vitamins also in anti ageing properties where it helps you're skin glow that is raise you're skin tone level step by step.
332655
Take care of your eyes. Avoid radiation and sun. Wear your sunglasses as much as possible. ;)
1107701
Its all about accomodation.  Naturally the eye can focus on an object.. near or far... when correction is needed....  "squinting" helps because it forces the lens in the back of the eye (the one you cant see) to change shape a little.. sometimes that can have a + effect when you are looking at something.\n\n\nIn regards to the comment below me here....\n\nThe pupil reacts to light.  It has nothing to do with accomodation.
1179944
it is strongest between 10am and 2pm.  this is because as the sun rises from the horision the light (and other radiations) are being filtered through more atmosphere. as the sun climbs higher it is comming more directly at you, peeking at noon(ish). Finally as the sun sets it reverses the process and again becomes filtered through more atmosphere.
625587
When the sun is 1/2 set, you are exposed to approximately 1/2 of its radiation. The earth itself is actually blocking some of its rays as viewed from a sunset. There is also much more moisture, higher air pressure, and radiation soaking materials interacting with and blocking the sun rays as you are looking at the sun tangently from the earth's surface.\n\nYou are marginally closer to the sun at noon time.
952518
If you looked into it for a long period of time, you might have some damage; however, if it flashes into your eye briefly, it's nothing to worry about.  By comparison, looking at the sun would be a LOT worse for your eyes.
406219
its mostly in the way you perceive that day but at the same time sunlight exposure increases seratonin production in the brain thereby putting you in a better mood.
1074810
Go check out our Sun....
662837
You are never supposed to stare directly at an eclipse.  It can hurt your eyes.  Most site I have seen it can make you go blind. Other sites said differently.
388414
refraction from the atmosphere magnifies.  When the moon, or sun, is low on the horizon, you're looking through more of the atmosphere to see it.
1122701
The coloration you are seeing in the sky at sunset is due to the sunlight being reflected and refracted by particles in the atmosphere.  If clouds are present, since they are mostly made up of tiny water droplets, help to refract the sunlight into a series of colorful hues.  Interestingly enough, pollution and dust have the same effect which is why desert sunsets always seem more majestic, even when there are no clouds in the sky.
57397
When the sun goes down, it is no longer produced.  If you lived somewhere like seattle where it is very rainy and there is little sunshine, it wouldn't be too effective.
1131498
The setting sun glows a reddish color on days when there are more particles in the air for the light to be scattered by.\nTypically, because the sunlight has to travel through more atmosphere when it is 4 degrees above the horizon as opposed to when it is directly above, there are already more particles in the air to scatter the light, so the sunset appears orange because the smaller wavelengths of visible light (blue, green, yellow) are scattered away from our eye.\nThe more particles (and the larger they are) that are in the atmosphere (water vapor particles due to humid air, pollution), the more wavelengths of light can be scattered.  So orange will get scattered away leaving only red coming to our eyes.
659160
It absorbs light energy from the sun.
904921
I agree with Day Light Savings. I don't think it is stupid. In summer, I don't want to wake up in mid afternoon. Also I like long evenings.
438458
General thought about looking directly at very bright light is correct. The lens of our eyes can project a many fold brighter image on the retina. This can damage the rods and cones in your retina and can even cause permanent damage to your vision.