I'm sad that so many of you think that we aren't doing amazing space exploration right now. We don't need "flags and footprints" to explore and learn incredible amounts.
Our entire understanding of Mars has changed in the last decade due to several phenomenally successful rovers
We've recently discovered that the universe's expansion is accelerating, which makes NO sense at all. None. But seems to be the case. How awesome is it that we've discovered something that doesn't answer our questions, but instead just created a whole ton more.
We've landed on a comet for the first time!
We've imaged objects from almost 13 billion years ago. And also improved our understanding of how old the universe is (about 13.7 billion, for those that are curious...)
And these are just a handful of things I thought of off the top of my head.
I'd say that's all a pretty good return on investment for less than 1% of the federal budget...