News tagged with cluster galaxies

Ripples in the cosmic background

(PhysOrg.com) -- The universe was created 13.73 billion years ago in a blaze of light -- the big bang. We also think that, about 380,000 years later, after matter (mostly hydrogen atoms) had cooled enough ...

Sep 07, 2010 4.6 / 5 (21) 5 | with audio podcast

The earth is not at rest

(Phys.org) -- The Earth is not at rest. It orbits the Sun, which in turn orbits the center of the Milky Way Galaxy, which in turn moves within the Local Group of Galaxies - a collection of about fifty four ...

Apr 18, 2012 4.5 / 5 (19) 4 | with audio podcast