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NASA Discovers Life's Building Blocks Are Common In Space

Date:
October 13, 2005
Source:
National Aeronautics And Space Administration
Summary:
After A team of NASA exobiology researchers revealed today organic chemicals that play a crucial role in the chemistry of life are common in space. "Our work shows a class of compounds that is critical to biochemistry is prevalent throughout the universe," said Douglas Hudgins, an astronomer at NASA's Ames Research Center, Moffett Field, Calif.

A polycyclic aromatic hydrocarbon with nitrogen. The blue balls are the carbon atoms that make the chicken-wire shaped PAH skeleton and the yellow balls show the hydrogen atoms which are attached to the edge. The red shows the position of a nitrogen atom which fits almost perfectly within the molecule.
Credit: Image courtesy of National Aeronautics And Space Administration

After A team of NASA exobiology researchers revealed today organic chemicals that play a crucial role in the chemistry of life are common in space.

"Our work shows a class of compounds that is critical to biochemistry is prevalent throughout the universe," said Douglas Hudgins, an astronomer at NASA's Ames Research Center, Moffett Field, Calif. He is principal author of a study detailing the team's findings that appears in the Oct. 10 issue of the Astrophysical Journal.

"NASA's Spitzer Space Telescope has shown complex organic molecules called polycyclic aromatic hydrocarbons (PAHs) 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. Normal PAHs aren't really important to biology," Hudgins said. "However, our work shows the lion's share of the PAHs in space also carry nitrogen in their structures. That changes everything."

"Much of the chemistry of life, including DNA, requires organic molecules that contain nitrogen," said team member Louis Allamandola, an astrochemist at Ames. "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 sewn," Allamandola said.

The NASA 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.

High-resolution images pertaining to this research are available on the Web at:

http://www.nasa.gov/centers/ames/multimedia/images/2005/spitzer.html For more information about this research on the Web, visit:

http://www.astrochem.org/PANHS.html For information about NASA and agency programs on the Web, visit:

http://www.nasa.gov/home


Story Source:

The above story is based on materials provided by National Aeronautics And Space Administration. Note: Materials may be edited for content and length.


Cite This Page:

National Aeronautics And Space Administration. "NASA Discovers Life's Building Blocks Are Common In Space." ScienceDaily. ScienceDaily, 13 October 2005. <www.sciencedaily.com/releases/2005/10/051013084725.htm>.
National Aeronautics And Space Administration. (2005, October 13). NASA Discovers Life's Building Blocks Are Common In Space. ScienceDaily. Retrieved April 19, 2014 from www.sciencedaily.com/releases/2005/10/051013084725.htm
National Aeronautics And Space Administration. "NASA Discovers Life's Building Blocks Are Common In Space." ScienceDaily. www.sciencedaily.com/releases/2005/10/051013084725.htm (accessed April 19, 2014).

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