If we didn't have education we'd never have been able to figure out space exploration in the first place. We wouldn't have been able to figure out the maths and physics behind it. We wouldn't have been able to build the ships in the first place. I think if we put more money into education then we'd have more people tackling the problems on how to travel faster in space and we'd get much better technology invented if we trained those brilliant minds.
I don't think that the funding of space exploration is more important than funding education in general, because without the proper funding for a solid grounding education the space exploration would cease to exist to this day. I think that if they space exploration wants to continue its success, a clear focus has to be put on the proper funding of education in general. You can't have one without the other.
The funding of space exploration is not more important than the funding of education. Both aspects are important and should be funded but education more so. The reason is if you stop funding education then in 30 years the people who could benefit from space exploration funding won't be knowledgeable enough to use it.