B1 · 2,715 words · French

Bienvenue dans l'Univers

Neil deGrasse Tyson, Michael A. Strauss, J. Richard Gott

Welcome to the Universe (2016) grew out of the introductory astrophysics course that Neil deGrasse Tyson, Michael A. Strauss and J. Richard Gott taught together at Princeton. Moving from the scale of the cosmos and the motions of the planets to the lives and deaths of stars, the book goes on to galaxies, quasars and black holes. It ends with the Big Bang, cosmic inflation and the shape and future of the universe. Along the way it takes up questions such as why Pluto lost its planet status, whether life exists elsewhere, whether the universe is infinite and whether time travel is possible. This summary distills its key ideas.

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The words readers of this text looked up most, each with its meaning and the line it comes from.

noyaux / nwa.jo /noun

cores

les éléments plus lourds dans leurs noyaux

heavier elements in their cores

centrecoeur

lactée / la vwa lacte /noun

Milky Way

L'Équation de Drake, formulée par l'astronome Frank Drake, tente d'estimer le nombre de civilisations extraterrestres actives et communicatives dans la Voie lactée.

The Drake Equation, formulated by astronomer Frank Drake, attempts to estimate the number of active and communicative extraterrestrial civilizations in the Milky Way.

galaxieespaceastronomie

approfondir / apʁɔfɔ̃diʁ /verb

deepen

chaque chapitre construisant sur le précédent pour approfondir la compréhension

each chapter building on the previous one to deepen understanding

le décalage / lə de.ka.laʒ /noun

shift

observer le décalage apparent

observe the apparent shift

dilatant / di.la.tɑ̃ /verb

expanding

puis se dilatant au cours des 13,8 milliards d'années.