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New Star Counting App Asks Citizen Scientists To Map The Skies
2013-12-20 15:46:51

Lee Rannals for redOrbit.com - Your Universe Online German researchers are asking citizen scientists to use an app to help them count the stars in their city to see how light pollution affects what shows up in the night sky. Scientists developed the “Loss of the Night" app to measure how the brightness of the sky changes over time, as lighting technologies change. The app has been expanded to support 11 languages to gather data from as many regions as possible. “Since the app...

Urban Galactic Clusters Stopped Forming Stars Billions Of Years Ago
2013-12-19 12:36:09

Brett Smith for redOrbit.com - Your Universe Online A new study based on data from NASA’s Spitzer Space Telescope has revealed new details about so-called urban galaxies that exist in large clusters. The study found that these clusters stopped forming new stars about 9 billion years ago, much later than previously thought. These galactic cities were said to have eventually either used up or lost their fuel. Meanwhile, more rural galaxies are still actively forming stars. "We know...

Supernova Legacy Survey Astronomers Reveal New Class Of Supernovae
2013-12-19 04:50:57

April Flowers for redOrbit.com - Your Universe Online Two of the brightest and most distant supernovae ever recorded have been discovered by astronomers affiliated with the Supernova Legacy Survey (SNLS). The findings, published in The Astrophysical Journal, reveal that the supernovae are 10 billion light-years away and a hundred times more luminous than a normal supernova. The extreme luminosity of these supernovae cannot be explained by the mechanism that powers most supernovae —...

2013-12-18 13:21:08

New types of assessments will be needed to measure student learning once the Next Generation Science Standards (NGSS) are implemented, says a new report from the National Research Council.  The tests that states currently use emphasize factual knowledge and were not designed to assess the type of understanding envisioned by the standards, which emphasize depth of knowledge based on the ability to integrate core content with science and engineering practices. The report describes a new...

2013-12-16 23:21:45

Olery’s unique and objective Guest Experience IndexTM will be leading in monitoring star rating for Abu Dhabi hotels. Amsterdam, The Netherlands (PRWEB) December 16, 2013 Olery (http://www.olery.com), the leading provider of guest experience management tools for the hospitality industry, announced today that is has signed a deal with the Abu Dhabi Tourism and Culture Authority to provide them with the technology behind their recently announced next step in in their hotel classification...

massive Star forming cluster discovered
2013-12-16 15:57:27

Lee Rannals for redOrbit.com - Your Universe Online Astronomers using the Smithsonian's Submillimeter Array (SMA) have discovered a giant star-forming region. Known as W49A, the region is located 36,000 light-years away from Earth on the opposite side of the Milky Way. Astronomers say the star-forming region shines 100 times brighter than the Orion nebula. In order to view W49A, astronomers had to aim SMA through dusty fog, after which the telescope helped reveal an active site of star...

Where Brown Dwarfs End And Stars Begin
2013-12-15 04:37:49

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online Stars form as interstellar gas accumulates, increasing in density and temperature. Eventually, the environment at the core of the object reaches a state where hydrogen begins fusing at a high enough rate that the outward radiation pressure and the inward gravitational force reach a balance, and a star is born. However, if the forming proto-star is not quite massive enough, the fusion process is not able to produce enough...

Crab Nebula Surprises Astronomers With Noble Gas Molecules
2013-12-13 04:31:42

[ Watch the Video: Supernova Remnant Shows Signs Of Noble Gas ] redOrbit Staff & Wire Reports - Your Universe Online Astronomers from the UK have discovered argon hydride within the Crab Nebula, marking the first time that noble gas molecules have been detected in space, according to research appearing in Friday’s edition of the journal Science. As part of their study, Mike Barlow of the University College London Department of Physics and Astronomy and his colleagues used the...

Mysterious Radio Bursts May Originate From Nearby Flaring Stars
2013-12-13 04:17:34

redOrbit Staff & Wire Reports - Your Universe Online Extremely quick, extremely bright radio pulses known as “fast radio bursts” may originate from flaring stars located within our own galaxy, researchers from the Harvard-Smithsonian Center for Astrophysics (CfA) claim in a new study. Based on their characteristics, scientists had believed that these radio bursts came from galaxies located billions of light-years away. However, the pulses – which typically only last for...


Latest Star Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

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2004-10-19 04:45:43

UV Astronomy -- UV astronomy is the branch of astronomy and astrophysics which deals with objects visible in ultraviolet (UV) radiation. UV radiation ranges approximatively from 10nm (extreme UV) to 380nm (near UV). Ultraviolet line spectrum measurements are used to discern the chemical composition, densities, and temperatures of interstellar medium, and the temperature and composition of hot young stars. UV observations can also provide essential information about the evolution of...

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2004-10-19 04:45:43

Hertzsprung-Russell Diagram -- In stellar astronomy, the Hertzsprung-Russell diagram (H-R diagram) shows the relation between the absolute magnitude and the spectral types of stars. It was invented around 1910 by Ejnar Hertzsprung and Henry Norris Russell. There are two equivalent forms. One is the observer's form which plots the color of the star on one axis and the absolute magnitude on the other axis. The theoretician's form plots the temperature of the star on one axis and the...

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2004-10-19 04:45:43

X-ray Burster -- X-ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from...

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2004-10-19 04:45:43

Variable Star -- Most stars are of nearly constant luminosity. Our own Sun is a good example which goes through practically no measurable variation in brightness. There are, however, stars which do vary in brightness, called variable stars. They fall into two main groups: Intrinsic variables These are stars which have intrinsic variations in brightness, that is the star itself gets brighter and dimmer. There are many types of intrinsic variables, the main types being: -- Mira...

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Word of the Day
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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