Black and white reproductions of Vincent van Goghs "The Starry Night" lack the beauty and depth of the original oil painting. In a similar fashion, images of stars and galaxies composed of a single wavelength band cannot convey the wealth of information now accessible to astronomers.
This false-color image shows infrared (red), optical (green), and X-ray (blue) views of the N49 supernova remnant. This object, the remains of an exploded star, has million-degree gas in the center, with much cooler gas at the outer parts of the remnant. Credit: NASA (SSC/HST/CXC), U.Illinois (R.Williams & Y.-H.Chu)
This false-color image shows infrared (red), optical (green), and X-ray (blue) views of the large star-forming complex N51. The warm ionized gas is shown in green, the hot ionized gas is in blue, and the proto-stars are primarily in red. Credit: NASA/SSC/MCELS/ESA/U.Illinois (Y.-H. Chu and R. A. Gruendl)
In recent years, a number of ground-based optical and radio surveys of the Large and Small Magellanic Clouds -- Earths nearest neighboring galaxies -- have become available. New composite images of optical, radio, infrared, ultraviolet and X-ray wavelengths are giving astronomers at the University of Illinois at Urbana-Champaign a clearer picture of the birth, life and death of massive stars, and their effect on the gas and dust of the interstellar medium surrounding them.
From their birth to their death, massive stars have a tremendous impact on their galactic surroundings. While alive, these stars energize and enrich the interstellar medium with their strong ultraviolet radiation and their fast stellar winds. As they die, shock waves from their death throes inject vast quantities of mechanical energy into the interstellar medium and can lead to the formation of future stars.
James E. Kloeppel | EurekAlert!
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The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
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