The sun and its retinue of planets drift as a group through the vast gulfs of space that separate the stars.
Copy Quote View & ShareIt would be a pity if, frustrated by the price of travel, we elected to become a society that never made contact, that never gave SETI a fair chance.
Copy Quote View & ShareIf interstellar travel is as time- or energy- demanding as the above figures indicate, it is far from obvious what the motive for colonization might be.
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