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e! Science News - Astronomy Space
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Weather on the outer planets only goes so deep
pWhat is the long-range weather forecast for the giant planets Uranus and Neptune? These planets are home to extreme winds blowing at speeds of over 1000 km/hour, hurricane-like storms as large around as Earth, immense weather systems that last for years and fast-flowing jet streams. Both planets feature similar climates, despite the fact that Uranus is tipped on its side with the pole facing the sun during winter. The winds on these planets have been observed on their outer surfaces; but to get a grasp of their weather systems, we need to have an idea of what is going on underneath. For instance, do the atmospheric patterns arise from deep down in the planet, or are they confined to shallower processes nearer the surface?/p
pa href=http://esciencenews.com/articles/2013/05/16/weather.outer.planets.only.goes.so.deepread more/a/p
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Black hole powered jets plow into galaxy
pThis composite image of a galaxy illustrates how the intense gravity of a supermassive black hole can be tapped to generate immense power. The image contains X-ray data from NASA's Chandra X-ray Observatory (blue), optical light obtained with the Hubble Space Telescope (gold) and radio waves from the NSF's Very Large Array (pink)./p
pa href=http://esciencenews.com/articles/2013/05/15/black.hole.powered.jets.plow.galaxyread more/a/p
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New method of finding planets scores its first discovery
pDetecting alien worlds presents a significant challenge since they are small, faint, and close to their stars. The two most prolific techniques for finding exoplanets are radial velocity (looking for wobbling stars) and transits (looking for dimming stars). A team at Tel Aviv University and the Harvard-Smithsonian Center for Astrophysics (CfA) has just discovered an exoplanet using a new method that relies on Einstein's special theory of relativity./p
pa href=http://esciencenews.com/articles/2013/05/13/new.method.finding.planets.scores.its.first.discoveryread more/a/p
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Dust in the clouds
pAt any given time, cirrus clouds -- the thin wisps of vapor that trail across the sky -- cover nearly one-third of the globe. These clouds coalesce in the upper layers of the troposphere, often more than 10 miles above the Earth's surface. Cirrus clouds influence global climate, cooling the planet by reflecting incoming solar radiation and warming it by trapping outgoing heat. Understanding the mechanisms by which these clouds form may help scientists better predict future climate patterns./p
pa href=http://esciencenews.com/articles/2013/05/09/dust.cloudsread more/a/p
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Astronomers discover surprising clutch of hydrogen clouds lurking among our galactic neighbors
pIn a dark, starless patch of intergalactic space, astronomers have discovered a never-before-seen cluster of hydrogen clouds strewn between two nearby galaxies, Andromeda (M31) and Triangulum (M33). The researchers speculate that these rarefied blobs of gas -- each about as massive as a dwarf galaxy -- condensed out of a vast and as-yet undetected reservoir of hot, ionized gas, which could have accompanied an otherwise invisible band of dark matter. The astronomers detected these objects using the National Science Foundation's Green Bank Telescope (GBT) at the National Radio Astronomy Observatory (NRAO) in Green Bank, W.Va. The results were published in the journal emNature/em./p
pa href=http://esciencenews.com/articles/2013/05/08/astronomers.discover.surprising.clutch.hydrogen.clouds.lurking.among.our.galactic.neighborsread more/a/p
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