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The Science Book by

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RG

IN CONTEXT

BRANCH

Cosmology

BEFORE

1543 Nicolaus Copernicus concludes that Earth is not the center of the universe.

17th century The changing view of stars offered by Earth’s orbit around the Sun gives rise to the parallax method for measuring stellar distances.

19th century Improvements to telescopes pave the way for the study of starlight and the rise of astrophysics.

AFTER

1927 Georges Lemaître proposes that the universe can be traced back to a single point of origin.

1990s Astronomers discover that the expansion of the universe is accelerating, driven by a force known as dark energy.

By the early 20th century, ideas about the scale of the universe divided ...

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