Astronomy Quote by Carl Sagan

In a dispassionate comparison of the relative values of human and robotic spaceflight, the only surviving motivation for continuing human spaceflight is the ideology…

— James Van Allen

With so much conflict in the world, space exploration can be a beacon of hope.

— Anne McClain

Space exploration must be undertaken not only out of simple human curiosity but also to further the survival of the species. The twentieth century…

— Edgar Mitchell

When someone tells me, 'Oh, we have so many problems on Earth; space exploration costs too much money,' I say, 'I absolutely agree with…

— Mary Roach

“If the driving force behind bettering human life is our insatiable desire to escape mortality what will we do when we succeed?”

— Tim J. Brooks

The conquest of space is worth the risk of life.

— Gus Grissom

The impact of space activities is nothing less than the galvanizing of hope and imagination for human life continuum into a future of infinite…

— Vanna Bonta

Space travel is the only technology that is more dangerous and more expensive now than it was in its first year. Fifty years after…

— Burt Rutan

“We have such high levels of automation and we still wonder why we are suffering. We walk around in our robotic states and we…

— Mateo Tabatabai

I'm really hopeful about the future of space exploration and human spaceflight. Civilization as we know it has been defined by exploration. You know,…

— Alan G. Poindexter

“Why travel to the Moon or Mars if we only continue our wars there with Russia or China or Africa? Why build rockets at…

— Ray Bradbury

If we die, we want people to accept it. We are in a risky business, and we hope that if anything happens to us…

— Gus Grissom