“Space can be mapped and crossed and occupied without definable limit; but it can never be conquered. When our race has reached its ultimate achievements, and the stars themselves are scattered no more widely than the seed of Adam, even then we shall still be like ants crawling on the face of the Earth. The ants have covered the world, but have they conquered it - for what do their countless colonies know of it, or of each other?” KnowsWorldStillsEarthFacesStarsSpaceRaceLimitsAchievementUltimateSeedsCoveredAdamAntsColonySpace TravelCrawling Author:Arthur C. Clarke
“Trillions of years into the future, when all stars are gone...all parts of the cosmos will cool to the same temperature as the ever-cooling background. At that time, space travel will no longer provide refuge because even Hell will have frozen over. We may then declare that the universe has died-not with a bang, but with a whimper.” YearsMayUniverseStarsSpaceGoneHellDiedBackgroundsCosmosRefugeFrozenExtinctionBangsTemperatureSpace TravelCoolingAll Stars Author:Neil deGrasse Tyson
“David will never go to space again. I'm glad.What did it gain the McQuarries? What has it ever gained men? Have men ever brought back more happiness from the stars? Will they ever?” MenStarsSpaceGainsGladTravelerAstronautSpace Travel Author:Leigh Brackett
“The Stone trembled and threw herself outward bound, toward Saturn. In her train followed hundreds and thousands and hundreds of thousands of thousands of restless, rolling Stones . . . to Saturn . . . to Uranus, to Pluto . . . rolling on out to the stars . . . outward bound to the ends of the Universe.” EndsUniverseStarsStonesTrainBoundsRollingTravelerRestlessAstronautRolling StonesSpace TravelSaturnPlutoOutward Bound Author:Robert A. Heinlein
“Constantly working outward, putting system after system inside the known universe, they were the bright hungry wave of mankind reaching out to gather in the stars.” UniverseStarsKnownMankindWaveWork OutHungryReachingReach OutTravelerAstronautSpace Travel Book:The Furious Future: Stories Source: The Furious Future: Stories