Feature Astronomy Embracing the Dark Side Looking back on a decade of cosmic acceleration Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Ron Cowen January 29, 2008 at 2:17 pm Now entertain conjecture of a time NASA/STScI, E. Roell TUG OF WAR. Observations of distant Type 1a supernovas, which act as cosmic mile markers, reveal that the cosmic push of dark energy was always present in the universe but didn’t begin overwhelming the pull of dark matter until about 5 billion years ago. That’s when the cosmos began revving up its rate of expansion. NASA/STScI When creeping murmur and the poring dark Fills the wide vessel of the universe More Stories from Science News on Astronomy Space Meet Porphyrion, the largest pair of black hole jets ever seen By Lisa GrossmanSeptember 18, 2024 Space How a dying star is similar to a lava lamp By Lisa GrossmanSeptember 16, 2024 Space The historic ‘Wow!’ signal may finally have a source. Sorry, it’s not aliens By Lisa GrossmanAugust 21, 2024 Astronomy The nearest midsized black hole might instead be a horde of lightweights By Ken CroswellAugust 20, 2024 Astronomy A distant quasar may be zapping all galaxies around itself By Ken CroswellAugust 16, 2024 Astronomy Some meteors leave trails lasting up to an hour. Now we may know why By Lisa GrossmanAugust 8, 2024 Astronomy The North Star is much heavier than previously thought By Ken CroswellJuly 25, 2024 Astronomy A middleweight black hole has been spotted for the first time in our galaxy By Lisa GrossmanJuly 10, 2024