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Expansion Explained

Expansion Explained[1]

Q: How did astronomers discover that the expansion of the universe was accelerating?

(A question from Steve Ciucci, Madison, Wisconsin)

A: In the early 1990s, two teams of astronomers set out to measure the universe’s expansion history to predict its future. 349 more words

Universe Expansion

New Map of the Universe

Astronomers Make The Largest Map of The Universe Yet[1]

The image at left shows a slice through largest-ever three-dimensional map of the Universe. Earth is at the left, and distances to galaxies and quasars are labelled by the lookback time to the objects (lookback time means how long the light from an object has been traveling to reach us here on Earth). 994 more words

Universe Expansion