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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/cosmix_crash.m4a' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Scientists Strike Gold With Cosmic Crash' data-article-id='2692'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='15958'>Witnessing a neutron star violently crash into another has helped astronomers uncover secrets of the universe  including how gold was created.</span> <span data-start-time='15958' data-end-time='22167'>Neutron stars are the collapsed centers of stars.</span> <span data-start-time='22167' data-end-time='31667'>These two neutron stars circled each other at a very fast rate, getting closer and closer.</span> <span data-start-time='31667' data-end-time='38854'>Then they crashed into each other in an event called a kilonova.</span> <span data-start-time='38854' data-end-time='54396'>This collision created a burst of gamma rays, or electromagnetic energy, and gravitational waves, which make a weak signal when they reach Earth.</span> <span data-start-time='54396' data-end-time='62250'>Vicky Kalogera is an astrophysicist with Northwestern University near Chicago.</span> <span data-start-time='62250' data-end-time='69708'>She explains what the astronomers heard and saw two months ago.</span> <span data-start-time='69708' data-end-time='75208'>So this is the first time that we hear the death spiral of two neutron stars. </span> <span data-start-time='75208' data-end-time='79500'>And we also see the fireworks that came from the final merger.</span> <span data-start-time='79500' data-end-time='83229'>What they saw was a bright, blue light.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/2175/cosmic_crash.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=9579 data-hint-location='69708' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/what_does_spiral_mean.m4a'>What does spiral mean?</div><div class='choices' data-correct-choice='curving line'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/curving_line.m4a'><span>curving line</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/outer_space.m4a'><span>outer space</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/star_explosion.m4a'><span>star explosion</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/blue_light.m4a'><span>blue light</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=9580 data-hint-location='31667' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/what_did_the_two_stars_do.m4a'>What did the two stars do?</div><div class='choices' data-correct-choice='crash into each other'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/circled_faster.m4a'><span>circled faster</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/crash_into_each_other.m4a'><span>crash into each other</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/make_a_planet.m4a'><span>make a planet</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/create_new_energey.m4a'><span>create new energey</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=9581 data-hint-location='15958' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/neutron_stars_are_the__blank__centers_of_stars.m4a'>Neutron stars are the <span class='blank'>collapsed</span> centers of stars.</div><div class='choices' data-correct-choice='collapsed'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/empty.m4a'><span>empty</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/bright_blue.m4a'><span>bright blue</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/collapsed.m4a'><span>collapsed</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/2175/creamy.m4a'><span>creamy</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>

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