It turns out that the history of astrophysics is where we perfected time keeping.

Imagination alone is not enough, because the reality of nature is far more wondrous than anything we can imagine

I love the future we might invent for ourselves that I have not yet dreamt of.

Private enterprise can never lead a space frontier. It's not possible because a space frontier is expensive, it has unknown risks and it has unquantified risks.

One of the reasons we're here, that we exist at all, is that Earth, cosmically speaking, is in a relatively peaceful place: orbiting our Sun in a near perfect circle.

The universe's destiny has very little to do with the near-term destiny of Earth.

After your first job, is anyone asking you what your GPA was? No, they don't care. They ask you: Are you a good leader? Do people follow you? Do you have integrity? Are you innovative? Do you solve problems? Somebody's got to do that homework and redesign the educational system so that it can actually train people to be successful in life.