Precursor To Life Found In Space Cloud

Astronomers have found tentative traces of a precursor chemical to the building blocks of life near a star-forming region about 1,000 light-years from Earth.

The signal from the molecule, hydroxylamine, which is made up of atoms of nitrogen, hydrogen and oxygen, still needs to be verified. But, if confirmed, it would mean scientists had found a chemical that could potentially seed life on other worlds, and may have played a role in life's origin on our home planet 3.7 billion years ago.

Some astronomers think that the ingredients for life are formed in cold, gas-, dust- and plasma-filled interstellar clouds. Comets, asteroids and meteors forming in these clouds bear such chemicals, and as they continually bombard planets, they could have deposited the chemicals on Earth or other worlds, said Anthony Remijan, an astrochemist at the National Radio Astronomy Observatory in Charlottesville, Va., who led the research effort.

To test this theory, astronomers look for the chemical fingerprints of simple, inorganic compounds forming in interstellar clouds. These compounds aren't life or even carbon-based, but they can react with other molecules to form some of the building blocks of life, such as amino acids or the nucleotides that make up DNA...

In the hunt for these molecules, Remijan and colleagues scanned a star-forming region of the Milky Way called L1157-B1 using the Combined Array for Research in Millimeter-wave Astronomy (CARMA).

They found a very weak signal of hydroxylamine, which makes sense since, inside L1157-B1, a violent gas jet is slamming into the interstellar medium; the shock from this gas outflow would be sufficient force to trigger these chemical reactions in the otherwise frigid depths of an interstellar cloud. The result: hydroxylamine. In turn, hydroxylamine could react with other compounds, such as acetic acid, to form amino acids that could be dumped onto other worlds during space-rock collisions.

In his 1957 book The Black Cloud, astronomer and sf author Fred Hoyle discusses the possibility of an intelligent, living cloud in space. Not to sensationalize this story, but here's one of the covers of Hoyle's novel; the 1959 paperback edition.


(Earth menaced by a power beyond the planets and older than time!)

And here's a quote from the cloud:

[I]t is most unusual to find animals with technical skills inhabiting planets, which are in the nature of extreme outposts of life... Living on the surface of a solid body, you are exposed to a strong gravitational force. This greatly limits the size to which your animals can grow and hence limits the scope of your neurological activity. It forces you to possess muscular structures to promote movements, and ... to carry protective armour ...

[Y]our very largest animals have been mostly bone and muscle with very little brain... By and large, one only expects intelligent life to exist in a diffuse gaseous medium... The second unfavourable factor is your extreme lack of basic chemical foods. For the building of chemical foods on a large scale starlight is necessary. Your planet, however, absorbs only a very minute fraction of the light from the Sun. At the moment, I myself am building basic chemicals at about 10,000,000,000 times the rate at which building is occurring on the whole ... surface of your planet.

From Space.com.

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