by Staff Writers
Madrid, Spain (SPX) May 31, 2012
In a fjord in Canada scientists have found a landscape similar to one of Jupiter's icy moons: Europa. It consists of a frozen and sulphurous environment, where sulphur associated with Arctic bacteria offer clues for the upcoming missions in the search for traces of life on Europa.
It is not easy to find a place on Earth where ice and sulphur come together, supposedly like on Europa, Jupiter's moon. Nonetheless, this place has been located at Borup Fjord Pass in the Canadian High Arctic. Here the sulphurous yellow emissions contrast with the whiteness of the environment, creating images similar to those captured at Jupiter's satellite.
US researchers have now verified that the sulphur involved in the life cycle of Arctic microorganisms has some characteristics that could help to detect biological remains on Europa. Large space agencies like NASA and the European Space Agency are already in the process of preparing missions.
"We have discovered that elemental sulphur (S) can contain morphological, mineralogical and organic 'biosignatures' linked to bacterial activity.
If they are found on Europa, this would suggest the possible presence of microorganisms," as explained to SINC by Damhnait Gleeson, lead author of the study and currently member of the Centro de Astrobiologia (INTA-CSIC, Spain).
The 'biosignatures' are associated with needle and rhomboid sulphur shapes in which mineralised remains of microorganisms and extracellular material appears.
Thanks to electron microscopy and X-ray diffraction techniques, the formation of a rare type of sulphur has also been observed in association with organic components: the rosickyite.
What is more is that small quantities (parts per million) of protein, fatty acids and other biomolecules have appeared in the sulphurous material.
"There is much evidence of bacterial activity," highlights Gleeson, who wonder if in the Europa's icy crust, or the ocean or lakes supposedly beneath it, there could be a similar microbial community that uses sulphur as their source of energy.
The researcher conducted the study, which has now been published in the Astrobiology journal, as a member of NASA's Jet Propulsion Laboratory and the University of Colorado in the USA. She is currently working as a scientist in the Centro de Astrobiologia in Rio Tinto (Spain), a place similar to Mars.
Damhnait F. Gleeson, R.T. Pappalardo, M.S. Anderson, S.E. Grasby, R.E. Mielke, K.E. Wright, A.S. Templeton. "Biosignature Detection at an Arctic Analog to Europa". Astrobiology 12 (2): 135-150, 2012. Doi:10.1089/ast.2010.0579.
FECYT - Spanish Foundation for Science and Technology
Life Beyond Earth
Lands Beyond Beyond - extra solar planets - news and science
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|