What are the most depressing things about space exploration?

That it's a massive killing zone of death and destruction. Other answers have talked about how truly gigantic space is and how many wonders and secrets are hidden out there (that we might never see). read more

The most depressing things about space exploration are We won't be able to explore everything, we won't be able to know everything about our universe. We could never be capable enough to conquer space. read more

Most of the universe out there is pretty bleak. The planets and their moons look like exotic but very severe places to visit. They wouldn’t be much fun to explore, except remotely. Unlike the exploration of the New World in the 1500s and 1600s, will be completely dependent on the resources of a major country or company just to survive. read more

There are many interesting things that happened in space exploration. But I personally find this quite interesting. The Heart of Pluto. Yes, I am talking about the Discovery of Tombaugh Regio in Pluto by New Horizons. read more