Word: planet
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Dates: during 1980-1989
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...astrophysical community do for invisible radiation what Galileo had done nearly four centuries earlier for visible light. For the first time. humans now probe the universe in its full grandeur, the bulk of which, it seems, is unaccessible to the eyes that serve us so well on planet Earth...
...death of a massive star into an object not much larger than a typical city. Gravity is so intense that a teaspoon of neutron-star stuff would weigh about a million tons, a human would be crushed to the thickness of a postage stamp, and the entire population of planet Earth, if shipped to a neutron star, would be compressed into a volume about the size of an aspirin tablet. Strange objects, these neutron stars they represent demonstrably non-terrestrial states of matter. Their abnormal properties are surpassed by only one other type of phenomenon--the black hole...