Why are Sun Spots dark?
401016
because of the distance and variations of the surface temperature of the sun, plus the infrared spectrum within the sun, sun spots appear darker.Photvoltiac activity is contained within or under the suns surface, thereby hidden from our view, but detected via spectrum analyzers
1168385
Because of their skin color. I know that everyone needs to put on some sun screen. Just because your skin is dark doesn't mean you are protected form UV rays.
1001155
Thunderstorms clouds appear dark because the light from the sun is not making it through the clouds and to our eyes. The millions of tiny water droplets in the cloud help scatter, reflect, and absorb the sun's light as it travels down to earth. From space these clouds look very bright because they are reflecting and scattering lots of light, but from the ground it will appear very very dark.
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.
175969
pretty much the same as sun spots
632107
Black spots?  Are they freckles?  Could they be small broken capillaries?  Sun spots? Are you a sun goddess?  What do they look like?  Are they liver spots?\n\nAnyway - if they are any of the above... this product takes them away = NO KIDDING  It's called the "sleeping peel liver spot remover"... you put it on and leave it there.  After it dries, you peel it away.  The dark spot comes with it, making it less noticible.  I swear by this.  Give it a try, you'll be glad you did.
995882
Does it get worse when you are in the sun? Could be a benign skin fungus (my kid gets them on his face in summer). Try selsun blue, rub it on, let it set a bit, wash it off. Repeat twice daily for a week or so. \nNot got anything to do with the sun? Could be vitaligo. Its a disease where the melanin producing cells dont do their job and you end up with white spots. Alot of times it is on hands and feet. Look it up online. Check with your doc. There are also some vitamin and mineral deficiancies that can cause spotting. I dont know those right off the top of my head.
1127386
I can think of 2 possibilities.  One is when they use an occulting disk to block out the Sun (because it is so bright), so you see a black disk, and then you can see the space around the Sun.  They do that to look at the atmosphere around the Sun.  Take a look at the first link below.\n\nThe other possible answer is that the photographs are not taken in normal visible light but some other wavelength.  in the second link, there is a picture where the Sun's 'normal' surface looks dark.  The caption helps explain it.
931172
Because we are really close to our star, the sun.  The light from it drowns out the other lights from stars.  The same way a very small light in a room is drowned out by turning on a much larger one.  At night, we are completely turned away from it, so we can now see other lower light sources.
935525
You were high enough to see the sun over the horizon. On the ground it would be darker.
7104
This spot is called in medicine "post inflammatory hyperpigmentation" and can result from any injury or inflammation to the skin. This is more likely to occur if you tan easily or have a dark complexion. If left undisturbed (don't pick at it; friction can make it darker or last longer! :), it will slowly fade. Bleaching creams can make it fade more quickly, but are not always necessary. Be patient, as fading can take weeks if not months to complete.
247669
Most dark circles are caused by the appearance of veins beneath the thin skin under our eyes. As we age and our skin becomes more damaged due to sun exposure, the skin under our eyes becomes thinner and more wrinkled, which allows the veins in this fatty padded area under the eye to appear more prominent. These veins also become more swollen and obvious in people with allergies. Similarly, people with a history of eczema, hay fever or asthma often develop dark circles. They do, of course, become more apparent with a lack of sleep. In some people with dark skin, circles under the eye may actually be due to superficial pigmentation of the skin and not the underlying veins. \n\nSo there are many reasons for dark circles and some articles I've read do attribute nutrition.  It's impossible to nail down a single reason however.
778664
the sun heats up the molecules in the object expanding them slightly usually not noticeable to the human eye, black absorbs the light instead of reflecting it.
807689
They appear dark because they are very thick clouds and obscure sunlight from getting through. If viewed from above, they appear pure white.
72663
Its a cute question. :-)\nLet me explain it this way.\n\nShadows arent necessarily objects themselves. \nThey are just a patch of surface, which dont recieve direct light from the source (sun, lamp etc), but only recieve the scattered rays of light. \nAnd for this reason, these patches are dimly lit, making it look darker than the surrounding, which in our daily terms is 'black'. :-)
143483
Sunlight from the Sun would have to reflect off something in space in order for that region of space not to appear black.  For example the Moon doesn't look black because Sunlight is reflecting off its surface.\n\nSpace is for the most part black since there is an absence of material that can produce or relfect light there.
963666
because it gets dark at night on this planet