http://www.wolframalpha.com/input/?i=%28distance+from+sun+to+voyager+1+in+m%29+*%28universe+expansion+rate+in+sec%5E-1%29 http://www.wolframalpha.com/input/?i=%

http://www.wolframalpha.com/input/?i=%28distance+from+sun+to+voyager+1+in+m%29+*%28universe+expansion+rate+in+sec%5E-1%29 http://www.wolframalpha.com/input/?i=%28distance+from+sun+to... Result: speed of universe expansion between sun and voyager 1 is about 43.74 µm/s. Small enough to ignore.