Withdraw cash <a href=" http://www.balanceability.com/purchase-levothyroxine.pdf ">levothyroxine buy canada</a> The researchers used the Hubble Space Telescope&rsquo;s Cosmic Origins Spectrograph to observe GD 61 and split its light into constituent colors, revealing the chemicals it contains. They found magnesium, iron, silicon and other heavy elements, which wouldn&rsquo;t exist naturally on the surface of a white dwarf, suggesting that they fell onto the star from an orbiting object. The researchers also found a huge excess of oxygen&mdash;an amount, they say, that indicates the asteroid polluting the star&rsquo;s surface was originally composed of 26 percent water. That&rsquo;s pretty wet&mdash;Earth, by contrast, is only 0.02 percent water. &ldquo;This work marks the first detection of water-rich rocks in exoasteroids, and is an important step in developing a comprehensive picture of exoplanetary systems,&rdquo; says Kevin France of the University of Colorado at Boulder, who wasn&rsquo;t involved in the research.