http://kotaku.com/its-official-no-mans-sky-delayed-to-august-1779236658 And BOOM delayed not at all surprising so looks like Starbound will likely come out before No Man's Sky maybe even waaay before if it keeps getting delayed.
Actually, I think starbound will most likely be coming out at possibly around the same time. It will be interesting to see how things turn out. Though yeah, if NMS is delayed again and starbound continues development flawlessly, then yeah it will come out quite a while before.