Space enthusiasts are the most susceptible demographic to delusion that I have ever seen.

All tweets are tasty. Any tweet anybody writes is tasty. So, I try to have each tweet not simply be informative, but have some outlook, some perspective that you might not otherwise had.

I like seeing how people have succeeded when others would have presumed they would have failed, and others just go along with whatever everyone else does.

I object to religion in science classrooms not because it's religion but because it's not science.

Science is a way of equipping yourself with the tools to interpret what happens in front of you.

Astrophysicists perfected navigation. We perfected all these things that matter to the power of nations manifest on the world stage. So we want to go into space. That's the new high ground, right? We care about multispectral imaging of things. Well, that's what reconnaissance wants to do. So our expertise has been in bed with national security needs forever. So maybe, secretly, that's why they keep us employed.

The greatest explorer of recent decades is not even human.