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I've often wondered...if space is a vacuum, then how could the sun be "hot"?
What mechanism is there in the vacuum of space to actually conduct heat? We feel heat on the planet (as the OP stated) due to the solar rays creating friction with our atmosphere. But how is heat transferred/conducted in outer space?
Also, that comment about the sun not being as bright in space kind of makes sense, also. I can't prove this as I've never been to space, but if you think about light diffusion in photography, for example...or even a light bulb...
The source of light would be very intense, like a spotlight. Many light bulbs are frosted and photography light boxes have a diffuser (a thin white sheet) to spread the light and not make it as intense.
I could again see our atmosphere having the same effect. After all, the sun certainly gets diffused the deeper you go underwater. Why should the atmosphere be any different?
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