Just to put in a simple answer:
if you mean (A) for astronauts just in orbit (at the space station and so on) or on the surface of the moon. Yes, it is incredibly bright. Just like on Earth in the Sahara at noon!
A point of confusion is that THE >> SKY << IS BLACK, but it is incredibly bright. On Earth in daytime, the sky happens to be blue, and it is incredibly bright. On Moon in daytime, the sky happens to be >> black <<, and it is incredibly bright. (Same deal in orbit as on the Moon.)
(If you are, say, explaining to a young person "is there daytime/nighttime on the moon" that's the salient point to explain: on the moon, confusingly, the sky is black during both daytime and nighttime. But everything's just as bright on the moon in daytime as on Earth in daytime, there's the same amount of light, i.e. you can trivially read a book or see the ground, just the same as on Earth.)
If your question is about (B) in the solar system - say "on Uranus" or the like. There is remarkably less light there than on Earth, the sun is much smaller. Many young people don't realize this; everything's basically dark all the time from about Saturn outwards!
Outstanding page explaining this:
Finally if your question is about either (C) inside our galaxy but not near a star, or, (D) midway between the galaxies:
That's too difficult.