Word: earthly
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Dates: during 1980-1989
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Everybody also knows that the two superpowers possess enough nuclear firepower to destroy the earth many times over...
...explosion so violent that for a few weeks it will outshine hundreds of millions of stars put together. Its home, the Large Magellanic Cloud, is a satellite galaxy, or island of stars, that lies just beyond the fringes of our Milky Way galaxy, some 170,000 light-years from earth. (A light-year, the distance light travels in a year, is roughly 6 trillion miles...
...astronomy since 1604. It finally gives us a way of testing ideas about how stars and galaxies work and how abundances of heavy elements are created." The reason for the superlatives being expressed by Arnett and other astronomers is that this is $ the first supernova close enough to the earth to be scrutinized in fine detail by modern astronomical techniques...
...climbed to billions of degrees, and elements like silicon, sulfur and platinum, synthesized by the star, began spewing out over a vast region of space, where they will form clouds of gas and dust that can coalesce into new stars and planets. Indeed, most of the elements abundant on earth today, except hydrogen, were cooked up in some star that became a supernova. Says Woosley: "The calcium in our bones, the iron in hemoglobin and the oxygen we all breathe came from explosions like this...
...drafting refinements left and right). On land, you can remove as many as five of a box's six panels by shedding all structure and discipline; nothing to either side, nothing above or behind, or, more important, nothing blocking the path ahead. On water, even the sixth panel -- solid earth underfoot -- is gone. Michel, savoring these selected uncertainties, asked Janis to name their boat. She reached into her past and chose a surfing cry: Cowabunga...