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b'It has been 20 years since we learned the expansion of the universe is accelerating due to the mysterious force called dark energy. Saul Perlmutter shared the Nobel Prize in Physics because of his contributions. Now he shares his thoughts with us.\\xa0 Also at this year\\u2019s COSPAR Assembly in Pasadena was the Director General of China\\u2019s National Space Science Center, Wang Chi.\\xa0 Have you played with Eyes on the Solar System?\\xa0 JPL\\u2019s Kevin Hussey conceived of the NASA Eyes app that will take you across the solar system and beyond.\\xa0 And you\\u2019ll hear Planetary Society co-founder Carl Sagan\\u2019s message to the Martians in our future.\\xa0 That\\u2019s right after this week\\u2019s What\\u2019s Up.\\xa0 Learn more at:\\xa0 \\xa0http://www.planetary.org/multimedia/planetary-radio/show/2018/0808-2018-saul-permutter-wang-chi-nssc.html'