If We Do Not Speak For Earth,

We Are Made Of Stellar Ash. Our Origin And Evolution Have Been Tied To Distant Cosmic Events. The Exploration Of The Cosmos Is A Voyage Of Self-discovery.

We Live In An In-between Universe Where Things Change All Right...but According To Patterns, Rules, Or As We Call Them, Laws Of Nature.

It Is All A Matter Of Time Scale. An Event That Would Be Unthinkable In A Hundred Years May Be Inevitable In A Hundred Million.

Books Tap The Wisdom Of Our Species -- The Greatest Minds, The Best Teachers -- From All Over The World And From All Our History. And They're Patient.

Imagine We Could Accelerate Continuously At 1 G-what We're Comfortable With On Good Old Terra Firma-to The Midpoint Of Our Voyage, And Decelerate Continuously At 1 G Until We Arrive At Our Destination. It Would Take A Day To Get To Mars, A Week And A Half To Pluto, A Year To The Oort Cloud, And A Few Years To The Nearest Stars.