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Young
science students are often told that their body and everything around
them is
made of
stardust. The statement is meant to evoke wonder and challenge their
conceptions about the origins of matter and life on our planet.
While the
statement is true, it is an oversimplification of many profoundly
complex
processes that began billions of years ago in the deep recesses of our
universe. The issue of the origin of
matter and life on Earth is problematic as it
cannot be honestly addressed without
acknowledging the perspectives of the
religious and non-scientific communities who hold radically different
opinions as to the origin of life and matter. Science
educators find ourselves in a precarious position as we attempt to
teach
evolutionary theory without disrespecting the views of our diverse
student populations. This is indeed a difficult proposition
because technological
improvements in spectroscopic methods and space / ground based
telescopes have given researchers in the fields of astrochemistry, molecular astrophysics, and
astrobiology the ability to
investigate the farthest reaches of our galaxy. We now know
of more than 120 chemicals that exist in the Interstellar Medium: many
of which are prebiotic and ( under the correct conditions) able to
catalyze essential biotic functions. Recent
discoveries of these and other organic molecules in the Dense
Interstellar Medium
along with new understandings of the
functions of RNA suggest that the origin of the prebiotic
molecules that spawned life on our
planet may
in fact be extraterrestrial.
One of the molecules that has provoked intense speculation of the
role of space borne prebiotic compounds is the diose
glycolaldehyde. Glycolaldehyde is of importance because it is a
precursor to more complex sugars which are essential components in the
structrure of DNA. Glycolaldehyde was detected in a Dense
Molecular Cloud
located
towards the Galactic Center Source Sgr B2 (N) in 2000 by James Hollis,
Lovas and Jewell with the NRAO 12 meter radiotelescope. The
molecule was identified by the presesence of five rotational
transitions between 71 and 104 GHz (1).
The discovery was verified by Hollis et. al. in 2003 (2)
using the Green Bank 100 m telescope.
As science educator, I find the work of astrochemist to be an
invaluable addition to my understanding of chemical processes that
inform many of the concepts that I teach in my chemistry classroom.
Their work also helps me bridge the gap between those who accept
a scientific explanation of the origin of life and those that do not.
Being able to discuss the "gaps" and new discoveries in our
knowledge of the origin of life and matter helps me to create a
learning enviornment where all points of view are respected and
included. Such a classroom is not governed by a need to prove or
disprove theories, rather it is a place where discourse and
inquiry are the norm.
This webproject will explore the technology of
astrochemisty and the spectroscopic methods used to explore the
presence of glycoladehyde within the Interstellar Medium.
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