The universe’s expansion is accelerating, an observation that prompted astronomers to invoke an unknown entity called dark energy to explain it, has been further confirmed by new measurements. Scientists have used cosmic magnifying glasses called gravitational lenses to observe super-bright distant galaxies, giving a measure of how quickly the universe is blowing up like a giant balloon. They found, in agreement with previous measurements, that the universe’s expansion is indeed speeding up over time.
Scientists think that dark energy, the weird force blamed for propelling the universe to expand at an accelerated speed, probably turned on between 5 and 7 billion years ago. Now astronomers have mapped thousands of galaxies from this era, and have determined the most precise distances to them yet, in an effort to get to the bottom of the dark energy mystery. Dark energy is thought to represent about 74 percent of the universe’s total mass and energy, dwarfing ordinary matter.
NASA’s Galaxy Evolution Explorer, or Galex, was placed in standby mode as engineers prepare to end mission operations, nearly nine years after the telescope’s launch. The spacecraft is scheduled to be decommissioned. The Galaxy Evolution Explorer was launched on April 28, 2003. Its mission is to study the shape, brightness, size and distance of galaxies across 10 billion years of cosmic history. The 50 centimeter diameter (19.7-inch) telescope onboard the Galaxy Evolution Explorer sweeps the skies in search of ultraviolet-light sources.
Below are top 10 scientific stories of 2011.Israeli company has reported about the invention on a new vaccine for cancer. Vaccine which can also be used as a drug to cure the diseased person is called Vaxil. A rare half-male and half-female butterfly has emerged at the Natural History Museum’s Sensational Butterflies exhibition. In November 2011, reports have indicated that unique specie of lobster – a blue European lobster – was found in the fish market of Billingsgate, London. The European lobster is very similar to the American lobster, Homarus americanus, but it appears smaller and less aggressive. It can live to over 15 years in the wild but their rarely reach that age to do being heavily fished.
New results from NASAs Galaxy Evolution Explorer and the Anglo Australian Telescope on Siding Spring Mountain in Australia confirm that dark energy is exists
Scientists from the Sloan Digital Sky Survey created the largest 3-D map of the distant universe using the light of the brightest objects in the cosmos.To creat this map scientists relied on 14,000 quasars.