A successful day for me is when I teach people something. They become enlightened by an idea and learn how to think about it, so that later on when someone says, "Tell me about x, y, z," they don't have to say, "I know this because Tyson told me." No, they'll say, "Here's why it's true because I know and understand it."

Italy valued cathedrals while Spain valued explorers. So worldwide, five times as many people speak Spanish than Italian.

There's no denying the public's appetite for cosmic discovery.

The supermoon is a 16-inch pizza compared with a 15-inch pizza. It's a slightly bigger moon; I ain't using the adjective 'supermoon.'

When your reasons for believing something are justified ad hoc, you are left susceptible to further discoveries undermining the rationale for that belief.

Because we all just function, the rest of us, just go to work and come home; artists make life bearable. They give perspectives on things we never knew you could have. They bring joy. They explore inner human emotion, and at its best, the full dynamic range of that emotion.

A supernova is one of the most powerful explosions in the universe. It's so luminous, it can be seen across billions of light years. It releases as much energy in an instant as our sun will produce over its 10-billion-year lifetime.