Expert: Ed - 9/10/2009

Question
what is reason for the creation of magnetic fields in the universe especially in stars?also could be able to see Venus with our naked eye?do the sun have a spin motion?

Answer
Archana,
Stars develop magnetic fields because of highly charged masses of plasma moving in their interior.  It's similar to the lines of magnetism which develop around a wire in which electrical current travels.  Look at this article, and at the articles near the bottom of the wikipedia article page.
http://en.wikipedia.org/wiki/Stellar_magnetic_field

Venus can be seen with the naked eye, easily.  Yes.  It is brighter than the brightest star.  It is known as the Evening Star, and also the Morning Star.  This is because its orbit is relatively close to the sun, which means it shows up in the sky when the sun is not too far below the horizon.

The sun does rotate, yes.  It takes about 25 Earth days to rotate once, plus or minus a day or so, depending on your perspective on the rotation.
http://en.wikipedia.org/wiki/Solar_rotation

Keep Looking Up!
-Ed