We Are Not Machines Exploring The Universe,

There Is A Sunrise Or A Sunset From Space Every 92 Minutes So There Is An Incredible Amount Of Beauty To See From Up There.

Life Off Earth Is In Two Important Respects Not At All Unworldly: You Can Choose To Focus On The Surprises And Pleasures, Or The Frustrations. And You Can Choose To Appreciate The Smallest Scraps Of Experience, The Everyday Moments, Or To Value Only The Grandest, Most Stirring Ones.

Focus On The Journey, Not On Arriving At A Certain Destination.

Other Anatomical Changes Associated With Long-duration Space Flight Are Definitely Negative: The Immune System Weakens, The Heart Shrinks Because It Doesn't Have To Strain Against Gravity, Eyesight Tends To Degrade, Sometimes Markedly (no One's Exactly Sure Why Yet). The Spine Lengthens As The Little Sacs Of Fluid Between The Vertebrae Expand, And Bone Mass Decreases As The Body Sheds Calcium. Without Gravity, We Don't Need Muscle And Bone Mass To Support Our Own Weight, Which Is What Makes Life In Space So Much Fun But Also So Inherently Bad For The Human Body, Long-term.

I've Been Lucky Enough To Fly To Space Twice.