Although I agree with you that it&#x27;s in some ways amazing that we can, e.g. spot planets in solar systems hundreds of light-years away and still have discoveries like this one in our own &#x27;backyard&#x27;, I&#x27;d say that the intricacies of spacetime is a rather different issue which is not correlated with our lack of understanding of our own cosmic backyard, except for the fact that both are &#x27;astrophysical&#x27; phenomena (spacetime is more GR, but bear with me).<p>What I mean is that the intricacies of spacetime is something that can be mathematically formulated, tested, and &#x27;known&#x27; in a whole different way than how many objects reside in our solar system. It&#x27;s kind of analogous to saying that not knowing how many species there are on earth means we don&#x27;t understand how natural selection works.