The stars, like dust, encircle meIn living mists of light;And all of space I seem to seeIn one vast burst of sight

Where the stars are scattered thinly,' quoted Barr, 'And the cold of space seeps in.

60,000 kilometres per second may be the practical (!) speed limit for space travel

Of course there are worlds. Millions of them! Every star you see has worlds, and most of those you don't see.

All of a sudden, space isn't friendly. All of a sudden, it's a place where people can die. . . . Many more people are going to die. But we can't explore space if the requirement is that there be no casualties; we can't do anything if the requirement is that there be no casualties.