A lot of it was. Just because he got part of the black hole thingie right doesn't mean there aren't a shitton of problems.
Main one that bugged me is that they used a big ass rocket to get off Earth and then they had flying taxis for the new planets. Also, there's no way to generate that kind of waves on the time-shift planet, to get the tidal forces necessary for that kind of wave you'd need two very big things to pull at it and you got only one (the blackhole). Also, if 1h = 7 years, then the message sent from that planet would come it at 1/60000 the normal speed making it obvious what to expect long before they left Earth.
Not even gonna touch the going into the blackhole, communicating with the past and all that crap.
A quick google will provide a lot more. If they wanted to make a scientifically accurate movie, they should make sure everything is, not just what they could squeeze in.