News tagged with dark energy

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Do we need dark matter?

It's the biggest problem in physics: the matter we can see in the universe accounts for just five per cent of the observed gravity that holds galaxies together.

Nov 12, 2009
4.2 / 5 (22) 34

Radio telescopes extend astronomy's best 'yardstick'

Radio astronomers have directly measured the distance to a faraway galaxy, providing a valuable "yardstick" for calibrating large astronomical distances and demonstrating a vital method that could help determine the elusive ...

Jun 08, 2009
4.5 / 5 (11) 2

Celebrating gravity’s light-bending landmark

(PhysOrg.com) -- Today Oxford University scientists are joining in a special celebration of the first test of Albert Einstein’s theory of gravity on the remote African island where the ground-breaking experiment ...

May 29, 2009
3.7 / 5 (7) 1

Cosmology's best standard candles get even better

Members of the international Nearby Supernova Factory (SNfactory), a collaboration among the U.S. Department of Energy's Lawrence Berkeley National Laboratory, a consortium of French laboratories, and Yale ...

May 18, 2009
4.7 / 5 (13) 1

What is the geometry of the universe?

One of the big questions in cosmology regards the shape of the universe. "Shape" in this case is not the distribution of galaxies, but rather the shape of space and time itself. In general relativity, space ...

Sep 24, 2014
4.5 / 5 (54) 40