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Universe

— Space

ALMA inaugurated after rewriting history of stellar "baby boom"

By - March 14, 2013 4 Pictures
Even before the Atacama Large Millimeter/submillimeter Array (ALMA) was inaugurated this week, it was already rewriting history with its observations showing that a stellar baby boom took place much earlier than previously thought. But the pre-inauguration announcement isn’t a reflection that the ALMA team didn’t get to enjoy the official ceremony – like the first images released in 2011, the observations were taken while ALMA was still under construction. Read More
— Science

Quantum "spooky action at a distance" travels at least 10,000 times faster than light

By - March 10, 2013 4 Pictures
Quantum entanglement, one of the odder aspects of quantum theory, links the properties of particles even when they are separated by large distances. When a property of one of a pair of entangled particles is measured, the other "immediately" settles down into a state compatible with that measurement. So how fast is "immediately"? According to research by Prof. Juan Yin and colleagues at the University of Science and Technology of China in Shanghai, the lower limit to the speed associated with entanglement dynamics – or "spooky action at a distance" – is at least 10,000 times faster than light. Read More
— Science

Einstein's "biggest blunder" beats dark energy in explaining expansion of the Universe

By - January 16, 2013 2 Pictures
It is dangerous to bet against Einstein. Cosmological research shows that the rate at which the Universe expands is increasing, rather than decreasing as was previously thought. The concept of "dark energy" with a negative pressure was introduced to describe this acceleration. Now measurements of the proton to electron mass ratio (PEMR) over the past seven billion years strongly suggest that the models of dark energy are far more contrived in explaining accelerating expansion than is Einstein's self-proclaimed "biggest blunder" – the cosmological constant. Read More
— Science

Hubble discovers most distant galaxy ever observed

By - November 16, 2012 10 Pictures
NASA's Hubble telescope has discovered the most distant object yet seen in the universe. The object, a galaxy called MACS0647-JD, is 13.3 billion light years from Earth and can only be seen with the help of a lens of intergalactic proportions. The light from MACS0647-JD left it only 420 million years after the Big Bang, so it provides a valuable look into the nature of the early universe. Read More
— Research Watch Feature

Spitzer space telescope observations reveal expansion rate of the Universe

The size and age of our Universe is not only a critically important issue in cosmology, but is also among the most controversial and delicate of the cosmological questions. Infrared observations made using NASA's Spitzer Space Telescope have now given us the most precise estimate yet of the rate at which our Universe is expanding. The key was not the discovery of a new method for measuring distance. Rather, astronomers discovered how to measure brightness more accurately. The new value for the Hubble constant, good to within three percent, is 74.3 kilometers per second per megaparsec (km/s/Mpc). Read More
— Science

Australian study backs major assumption of cosmology

By - September 16, 2012 10 Pictures
In mankind's attempts to gain some understanding of this marvelous place in which we live, we have slowly come to accept some principles to help guide our search. One such principle is that the Universe, on a large enough scale, is homogeneous, meaning that one part looks pretty much like another. Recent studies by a group of Australian researchers have established that, on sizes greater than about 250 million light years (Mly), the Universe is indeed statistically homogeneous, thereby reinforcing this cosmological principle. Read More
— Science

Space sugar may shed light on how life evolved on Earth

By - August 31, 2012 5 Pictures
Using the latest-generation Atacama Large Millimeter Array (ALMA), which is an advanced system of 64 radio-telescope antennas in northern Chile, scientists at the European Southern Observatory have discovered a simple form of sugar orbiting a small binary star. Known as 16293-2422, that star is only 400 light-years away, and has about the same mass as the Sun. The finding could shed light on how the building blocks of life can originate spontaneously in deep space, even without a planet to support them. Read More
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