There are two artists called "Hearts of Space". 1) The ambient/trance duo of Pete Namlook (aka Air, Syn) and Pascal F.E.O.S. (of Resistance D and Aural Float).
2) An ambient radio show from Berkeley, California, hosted by Stephen Hill. 1) Hearts of Space is an ambient/trance-oriented project featuring prolific producer Pete Namlook and globally revered DJ Pascal F.E.O.S.. Their recordings were released on the legendary Fax +49-69/450464 label, and consisted of deep spacey drones sometimes being disturbed by intense beat action going from trance to breakcore.

Read more about Hearts of Space on Last.fm.