Life’s building blocks common in space, NASA says

<body leftmargin="0" bgcolor="#000060" text="#FFFFFF" link="#FFFF00" vlink="#FF9900"> <table border="0" cellpadding="0" cellspacing="0" width="95%" height="1"> <tr> <center> <td valign="top" width="33%" height="33"> <b> <p class="MsoNormal"><font face="Arial" size="5">Life’s building blocks common in space, NASA says</font></p> </b> <p class="MsoNormal"><font face="Arial" size="1">July 2, 2005<br> Special to World Science <b> <br> <br> </b> </font> <b><font size="2" face="Arial">Organic chemicals that play a crucial role in the chemistry of life are common in space, a study by NASA researchers has found.<br> <br> “Our work shows a class of compounds that is critical to biochemistry is prevalent throughout the universe,” said Douglas Hudgins, an astronomer at NASA Ames Research Center in California’s Silicon Valley. He is principal author of a study detailing the team’s findings that appears in the Oct. 10 issue of the Astrophysical Journal.<br> <br> “NASA’s Spitzer Space Telescope has shown complex organic molecules called polycyclic aromatic hydrocarbons… are found in every nook and cranny of our galaxy. While this is important to astronomers, it has been of little interest to astrobiologists, scientists who search for life beyond Earth,” he said.<br> <br> This is because these molecules ordinarily aren’t important to biology, Hudgins said. But his work has found that in space, the bulk of them “also carry nitrogen in their structures. That changes everything.”<br> <br> “Much of the chemistry of life, including DNA, requires organic molecules that contain nitrogen,” said team member Louis Allamandola. “Chlorophyll, the substance that enables photosynthesis in plants, is a good example of this class of compounds, called polycyclic aromatic nitrogen heterocycles, or PANHs. Ironically, PANHs are formed in abundance around dying stars. So even in death, the seeds of life are sown.”<br> <br> The NASA Ames team studied the infrared “fingerprint” of PANHs in laboratory experiments and with computer simulations to learn more about infrared radiation that astronomers have detected coming from space. They used data from the European Space Agency’s Infrared Space Observatory satellite.</font> </p> <p class="MsoNormal"><font face="Arial" size="2">* * *</font></p> <p align="left"><font face="Arial" size="2" color="#FFFFFF">Send us a <a href="mailto:editor@world-science.net">comment</a> on this story, or <a href="mailto:?Body=http://www.world-science.net/othernews/051013_organicsfrm.htm">send it to a friend</a></font></p> </b> <p></center> </td> </tr> </table> </body>