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Posts Tagged ‘universe’

Watch Live On October 28: The Making Of Dark Universe With Neil Tyson

October 25, 2013 Leave a comment

Tyson, the narrator of Dark Universe, will discuss what goes into the Space Show with astrophysicist Mordecai-Mark Mac Low, who curated the Space Show; Carter Emmart, who oversees astrovisualization at the Museum and served as the Space Show’s director; Vivian Trakinski, who produced Dark Universe; Timothy Ferris, author of Coming of Age in the Milky Way and other acclaimed books, who wrote the Dark Universe script; and composer Robert Miller, whose previous collaborations with the Museum included the score for the Space Show Journey to the Stars.

Link To Full Story

On The Trail Of Dark Energy: Physicists Propose Higgs Boson ‘Portal’

August 12, 2013 Leave a comment

One of the biggest mysteries in contemporary particle physics and cosmology is why dark energy, which is observed to dominate energy density of the universe, has a remarkably small (but not zero) value. This value is so small, it is perhaps 120 orders of magnitude less than would be expected based on fundamental physics.

Resolving this problem, often called the cosmological constant problem, has so far eluded theorists.

Now, two physicists – Lawrence Krauss of Arizona State University and James Dent of the University of Louisiana-Lafayette – suggest that the recently discovered Higgs boson could provide a possible “portal” to physics that could help explain some of the attributes of the enigmatic dark energy, and help resolve the cosmological constant problem.

In their paper, “Higgs Seesaw Mechanism as a Source for Dark Energy,” Krauss and Dent explore how a possible small coupling between the Higgs particle, and possible new particles likely to be associated with what is conventionally called the Grand Unified Scale – a scale perhaps 16 orders of magnitude smaller than the size of a proton, at which the three known non-gravitational forces in nature might converge into a single theory – could result in the existence of another background field in nature in addition to the Higgs field, which would contribute an energy density to empty space of precisely the correct scale to correspond to the observed energy density.

Full Story: https://asunews.asu.edu/20130809-dark-energy-krauss

‘Cosmic Mirages’ Confirm Accelerated Cosmic Expansion

April 11, 2012 Leave a comment

An international team of researchers led by Masamune Oguri at Kavli IPMU and Naohisa Inada at Nara National College of Technology conduced an unprecedented survey of gravitationally lensed quasars, and used it to measure the expansion history of the universe. The result provides strong evidence that the expansion of the universe is accelerating. There were several observations that suggested the accelerated cosmic expansion, including distant supernovae for which the 2011 Nobel Prize in Physics was awarded. The team’s result confirms the accelerated cosmic expansion using a completely different approach, which strengthens the case for dark energy. This result will be published in The Astronomical Journal.

Full Story: http://www.ipmu.jp/node/1281

New SCUBA-2 Camera Reveals Wild Youth of Universe

March 27, 2012 Leave a comment

A team of astronomers from the UK, Canada and the Netherlands have commenced a revolutionary new study of cosmic star-formation history, looking back in time to when the universe was still in its lively and somewhat unruly youth! The consortium, co-led by University of Edinburgh astrophysicist Professor James Dunlop, is using a brand new camera called SCUBA-2, the most powerful camera ever developed for observing light at “sub-mm” wavelengths (light that has a wavelength 1000 times longer than we can see with our eyes). Prof. Dunlop will present the first results from the survey on Tuesday 27 March at the National Astronomy Meeting in Manchester.

SCUBA-2 is mounted on the world’s largest sub-mm telescope, the 15-metre James Clerk Maxwell Telescope (JCMT), located atop the 4,300-metre high peak of Mauna Kea in Hawaii. The new project, named the SCUBA-2 Cosmology Legacy Survey will run for 3 years and will use the camera to provide the clearest view to date of dust-enshrouded star-forming galaxies. These objects are so remote that the light we detect left them billions of years ago, so we see them as they looked in the distant past. With SCUBA-2 astronomers are able to study objects that existed as far back as 13 billion years ago, within the first billion years after the Big Bang.

Full Story: http://www.jodrellbank.manchester.ac.uk/meetings/nam2012//pressreleases/nam05.html

Scientists Release Most Accurate Simulation of the Universe to Date

October 2, 2011 Leave a comment

“Bolshoi” supercomputer simulation provides new benchmark for cosmological studies

The Bolshoi supercomputer simulation, the most accurate and detailed large cosmological simulation run to date, gives physicists and astronomers a powerful new tool for understanding such cosmic mysteries as galaxy formation, dark matter, and dark energy.

The simulation traces the evolution of the large-scale structure of the universe, including the evolution and distribution of the dark matter halos in which galaxies coalesced and grew. Initial studies show good agreement between the simulation’s predictions and astronomers’ observations.

Full Story: http://www.astronews.us/2011-09-30-1225.html

Discovery Sheds Light on Ecosystem of Young Galaxies

August 30, 2011 Leave a comment

A team of scientists, led by Michael Rauch from the Carnegie Observatories, has discovered a distant galaxy that may help elucidate two fundamental questions of galaxy formation: How galaxies take in matter and how they give off energetic radiation. Their work will be published in the Monthly Notices of the Royal Astronomical Society.

Full Story: http://carnegiescience.edu/news/new_discovery_sheds_light_ecosystem_young_galaxies

Science Magazine Honors Universe Awareness Program

August 26, 2011 Leave a comment

Universe Awareness, a program endorsed by the IAU that uses astronomy to inspire and educate very young children around the world, has been recognized for its educational value by Science Magazine.

Universe Awareness (UNAWE) is the recipient of the Science Prize for Online Resources in Education (SPORE) award, introduced by Science Magazine as a means to showcase the best educational resources that are available on the internet and bring them to a wider audience.

Full Story: http://www.iau.org/public_press/news/detail/iau1104/