SUMMARY: Recent evidence seems to indicate that the expansion of the Universe is actually accelerating - some kind of "dark energy" is pushing it apart. And a new redshift survey of galactic clusters seems to support this. Astronomers using data gathered by the Chandra X-Ray Observatory have determined that there is insufficient matter (both regular and dark matter) in various galactic clusters to account for their shape and position, so something else must be having an effect.

View full article
What do you think about this story? post your comments below.