21 dic 2019 año - SOURCES

Descripción:

Tyson, Neil deGrasse. Astrophysics for People in a Hurry. W.W. Norton & Company, 2017.

Welsh, Jennifer. “The Inspiring Story of Neil DeGrasse Tyson's Life-Changing First Encounter with Carl Sagan.” Business Insider, Business Insider, 9 Nov. 2015,

"Neil deGrasse Tyson." Contemporary Black Biography, vol. 65, Gale, 2008. Biography In Context, Accessed 19 Nov.

Tyson, Neil deGrasse. “Profile: Neil DeGrasse Tyson.” Hayden Planetarium, Neil DeGrasse Tyson, 2018

“Neil DeGrasse Tyson.” American Physical Society, American Physical Society, 2018,

Mead, Rebecca. “Starman.” The New Yorker, The New Yorker, 19 June 2017,

“Neil DeGrasse Tyson.” Wikipedia, Wikimedia Foundation, 1 June 2006,

“Agency Honor Awards.” NASA People, NASA,

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