1. Space Colonization
Only a few decades after the first telescope was invented, a whole literature of space travel had emerged, mixing fiction with newly acquired astronomical knowledge (Man and Space 9-10). ... New technologies such as nuclear propulsion will make it easier to access other planets. ... Such events will be more severe than the nuclear winter that became such an issue during the Cold War (The Threat 1-4). The sun has been shining for about 4.5 billion years and has enough hydrogen fuel to burn for about ten billion years longer (How the Sun 1). ... About ninety nine percent of all stars end up ...
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