uhm..... well alot of people think space has no gravity, but its not true.
even the pull from very distant stars still effects us.
gravity never reaches zero in our universe.
space is said to have mirco gravity because of this
"A micro-g environment (also µg, often referred to by the term microgravity) is one where the acceleration induced by gravity has little or no measurable effect,"
http://en.wikipedia.org/wiki/Microgravity