This was the third cover art from the "Chaos Chronicles" series from Jeffery Carver (the others are "Neptune Crossing" and "Strange Attractors" in this gallery), published in 1995, by Tor Books.
I don't fully recall the story, but, as with all Jeff Carver's work, there was an abundance of soaring, cosmic, hard science, giving the reader a lot to think about.
In order to get this image, I had to scan the book and digitally remove the type. The art, and transparency have been long gone, but it's about 95% accurate to the original, done with gouache and acrylic on masonite.