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Latest Leptons Stories

a28d8d49796cfa3fb298d64d1e6506181
2009-08-16 10:00:00

Will the universe expand outward for all of eternity and end in a vast, dark, cold, sterile, diffuse nothingness? Or will the "Big Bang" "” the gargantuan explosion that formed the universe 14 billion years ago "” end in the "Big Crunch?" Planets, stars and galaxies all hurtle inward and collapse into an incredibly hot, dense mass a billion times smaller than the period at the end of this sentence. And then "¦ KA-BOOOOM!!! Another Big Bang and another universe forms and...

d27d4f578bdbac48e3ccd712811d73541
2009-07-23 09:33:53

A team of researchers working with data from ESA's Integral gamma-ray observatory has disproved theories that some form of dark matter explains mysterious radiation in the Milky Way. That this radiation exists has been known since the 1970s, and several theories have been proposed to explain it. Integral's unprecedented spectral and spatial resolution showed that it strongly peaks towards the center of the Galaxy, with an asymmetry along the Galactic disc. Several researchers have...

a311b56fb51b709a737a21fa0d6a8dbe1
2009-07-09 06:20:00

A team of astrophysicists has solved a mystery that led some scientists to speculate that the distribution of certain gamma rays in our Milky Way galaxy was evidence of a form of undetectable "dark matter" believed to make up much of the mass of the universe. In two separate scientific papers, the most recent of which appears in the July 10 issue of the journal Physical Review Letters, the astrophysicists show that this distribution of gamma rays can be explained by the way "antimatter...

a6f00163951d09254532d14387c7bec81
2009-06-24 09:50:00

South Dakota Gov. Mike Rounds paid a visit to UC Berkeley and Berkeley Lab last Friday (June 12) to get a feel for the type of research operation the campus and the lab plan to build at his state's famed Homestake gold mine.Rounds has strongly supported efforts to turn the mine, founded in 1877 by mining magnate and California Sen. George Hearst and taken out of operation in 2002, into the world's premier underground research laboratory, and the only one capable of answering critical...

8e3f0b83b3e0f6ad02fd2e6b829b20141
2009-05-29 13:54:31

True muonium, a long-theorized but never-seen atom, might be observed in future experiments, thanks to recent theoretical work by researchers at the Department of Energy's SLAC National Accelerator Laboratory and Arizona State University. True muonium was first theorized more than 50 years ago, but until now no one had uncovered an unambiguous method by which it could be created and observed. "We don't usually work in this area, but one day we were idly talking about how experimentalists...

2009-05-21 12:57:24

Ultrafast laser research at Kansas State University has allowed physicists to build on Nobel Prize-winning work in photo-electronics by none other than Albert Einstein. Einstein received the Nobel Prize in 1921 for his theoretical explanation in 1905 of the so-called photo-effect -- that is, the emission of electrons from a metal surface by incident light. In Einstein's time, laboratory light sources provided light of very low intensity in comparison with modern lasers like those at K-State....

117ea91a65d28a3e50e385efc41519d51
2009-01-31 11:40:00

Storing information in electron waves Stanford researchers have reclaimed bragging rights for creating the world's smallest writing, a distinction the university first gained in 1985 and lost in 1990. How small is the writing? The letters in the words are assembled from subatomic sized bits as small as 0.3 nanometers, or roughly one third of a billionth of a meter. The researchers encoded the letters "S" and "U" (as in Stanford University) within the interference patterns formed by quantum...

d252942075a806ec5cf1e11833f542051
2009-01-21 11:00:00

Cosmic-rays detected half a mile underground in a disused U.S. iron-mine can be used to detect major weather events occurring 20 miles up in the Earth's upper atmosphere, a new study has revealed. Published in the journal Geophysical Research Letters and led by scientists from the UK's National Centre for Atmospheric Science (NCAS) and the Science and Technology Facilities Council (STFC), this remarkable study shows how the number of high-energy cosmic-rays reaching a detector deep...

88a95cd42cef6f00922690095238f6121
2008-11-19 14:55:00

 Researchers at Washington University in St. Louis have shed light on a basic process that could improve future solar cells."One type of solar cell design starts with a chain of chromophores strung between two electrodes," explained Dewey Holten, Ph.D., professor of chemistry in Arts & Sciences. "This chain absorbs the light energy and directs that energy toward one electrode, where it is deposited as an electron. The molecule that lost the electron now has a positive charge left...

06c8b4671e78c675cc3186a48970794d1
2008-11-18 13:20:00

Take a gold sample the size of the head of a push pin, shoot a laser through it, and suddenly more than 100 billion particles of anti-matter appear. The anti-matter, also known as positrons, shoots out of the target in a cone-shaped plasma "jet." This new ability to create a large number of positrons in a small laboratory opens the door to several fresh avenues of anti-matter research, including an understanding of the physics underlying various astrophysical phenomena such as black holes and...


Latest Leptons Reference Libraries

4_ca2a430d92c0a654eab512344edfa0dd2
2004-10-19 04:45:41

Solar Radiation -- Solar radiation is radiant energy emitted by the sun due to nuclear fusion reactions. Fusion is the process whereby stars produce huge quantities of energy from the fusion of hydrogen or helium, in one of the most efficient processes of energy generation. The radiation referred to is usually electromagnetic energy, particularly infrared radiation, visible light, and ultraviolet. Some stars are known to emit radiation of other wavelengths. Solar neutrinos are a...

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Word of the Day
omphalos
  • The navel or umbilicus.
  • In Greek archaeology: A central boss, as on a shield, a bowl, etc.
  • A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.
'Omphalos' comes from the ancient Greek.
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