Planetary Protection

Planetary Protection Classification of Sample-Return Missions from the Martian Moons

This report reviews recent theoretical, experimental, and modeling research on the environments and physical conditions encountered by Mars ejecta during certain processes. It recommends whether missions returning samples from Phobos and/or Deimos should be classified as "restricted" or "unrestricted" Earth return in the framework of the planetary protection policy maintained by COSPAR. This report also considers the specific ways the classification of sample return from Deimos is a different case than sample return from Phobos.

Space Station Microbes Should Be Monitored To Avoid Threat To Astronaut Health

Strains of the bacterium Enterobacter, similar to newly found opportunistic infectious organisms seen in a few hospital settings, have been identified on the International Space Station (ISS).

Report: Review and Assessment of Planetary Protection Policy Development Processes

Protecting Earth's environment and other solar system bodies from harmful contamination has been an important principle throughout the history of space exploration. For decades, the scientific, political, and economic conditions of space exploration converged in ways that contributed to effective development and implementation of planetary protection policies at national and international levels.

Report: Review and Assessment of Planetary Protection Policy Development Processes

The current process for planetary protection policy development is inadequate to respond to increasingly complex solar system exploration missions, says a new report.

Hardy Organisms Threaten Interplanetary Contamination

In professor George Fox's lab at the University of Houston, scientists are studying Earth germs that could be contaminating other planets.

Cleaning ExoMars 2020 Rover For Mars

A ground penetrating radar antenna for ESA's ExoMars 2020 rover being pre-cleaned in an ultra-cleanroom environment in preparation for its sterilisation process, in an effort to prevent terrestrial microbes coming along for the ride to the red planet.

The Goals, Rationales, and Definition of Planetary Protection: Interim Report (2017)

Description: Solar system exploration is in an extraordinary state of expansion. Scientific capabilities to search for evidence of extant or relic life outside Earth--among the principal goals of solar system exploration--are advancing rapidly.

The Goals, Rationales, and Definition of Planetary Protection: Interim Report

In this time of rapid transition in exploring solar system bodies, the importance of reexamining planetary protection policies, including the need for clarity in how NASA establishes such policies, has become more urgent.

Planetary Protection For Human Missions to Mars

Since the dawn of space travel, nations from around the world have shown a commitment to protecting objects in the Solar System from contamination carried from the Earth and into space by spacecraft.

Planetary Protection and ExoMars Payload Integration

Like surgeons in an operating room, the technicians work gowned and masked in ESA's ultraclean microbiology laboratory, ensuring a high-tech sensor will not contaminate the Red Planet with terrestrial microbes.

NASA HQ Vacancy: Planetary Protection Officer

NASA has posted a position in the Science Mission Directorate for the Planetary Protection Officer. It has a very short response time, with applications due by June 25, 2014.

Could Life Hitch a Ride to Saturn and Jupiter?

A new study supported by the NASA Astrobiology Institute suggests that the possibility of life being transferred from the inner solar system to the moons of Jupiter and Saturn, although very rare, cannot be ruled out.

Planetary Protection: Preventing Microbial Hitchhiking

While astronauts might dream of discovering unknown life one day in their future career, ESA's Planetary Protection Officer oversees activities that achieve it on a regular basis.

Rare New Microbe Found in Two Distant Clean Rooms

A rare, recently discovered microbe that survives on very little to eat has been found in two places on Earth: spacecraft clean rooms in Florida and South America.

Could Life Have Survived a Fall to Earth?

It sounds like science fiction, but the theory of panspermia, in which life can naturally transfer between planets, is considered a serious hypothesis by planetary scientists. The suggestion that life did not originate on Earth but came from elsewhere in the universe (for instance, Mars), is one possible variant of panspermia. a.

Sterilized Mars Spacecraft Largely a Waste of Money

Writing in the journal Nature Geoscience, astrobiologists Alberto Fairen of Cornell University and Dirk Schulze-Makuch of Washington State University say the NASA Office of Planetary Protection's "detailed and expensive" efforts to keep Earth microorganisms off Mars are making missions to search for life on the red planet "unviable."

Planetary Protection: A Work in Progress

For the past few years, a research team in Antarctica has been drilling through several miles of ice in an effort to reach Lake Vostok. Lake Vostok is the largest of a number of bodies of fresh water trapped deep in the ice and isolated from the rest of Earth's biosphere for millions of years. What forms of life may exist in Lake Vostok are of interest not only to terrestrial ecologists but also astrobiologists given that moons such as Europa, Ganymede, and Enceladus may have water oceans underneath their outer icy surfaces.

ROSES-12 Amendment 1: Due Dates Changed for Appendix C.18, The Planetary Protection Research Program.

Planetary protection involves preventing biological contamination on both outbound and sample return missions to other planetary bodies. Numerous areas of research in astrobiology/exobiology are improving our understanding of the potential for survival of Earth microbes in extraterrestrial environments, relevant to preventing contamination of other bodies by organisms carried on spacecraft. Research is required to improve NASA's understanding of the potential for both forward and backward contamination, how to minimize it, and to set standards in these areas for spacecraft preparation and operating procedures. Improvements in technologies and methods for evaluating the potential for life in returned samples are also of interest.

For Appendix C.18, The Planetary Protection Research Program, Notices of Intent are now due on June 29, 2012, and Proposals are now due September 5, 2012. This change is being made so that the due dates occur on work days.

On March 9, 2012, this Amendment to the NASA Research Announcement "Research Opportunities in Space and Earth Sciences (ROSES) 2012" (NNH12ZDA001N) was posted on the NASA research opportunity homepage at http://nspires.nasaprs.com/ and appears on the RSS feed at: http://nasascience.nasa.gov/researchers/sara/grant-solicitations/roses-2012

Table 2 and Table 3 of the Summary of Solicitation for this NRA will be updated to reflect these changes.

Questions concerning Appendix C.18, The Planetary Protection Research Program, may be addressed to Cassie Conley, Planetary Science Division, Science Mission Directorate, NASA Headquarters, Washington, DC 20546-0001. Email: cassie.conley@nasa.gov; Telephone: 202-358-3912.

Due Dates Changed for the Planetary Protection Research Program

Planetary protection involves preventing biological contamination on both outbound and sample return missions to other planetary bodies. Numerous areas of research in astrobiology/exobiology are improving our understanding of the potential for survival of Earth microbes in extraterrestrial environments, relevant to preventing contamination of other bodies by organisms carried on spacecraft. Research is required to improve NASA's understanding of the potential for both forward and backward contamination, how to minimize it, and to set standards in these areas for spacecraft preparation and operating procedures. Improvements in technologies and methods for evaluating the potential for life in returned samples are also of interest.

Notices of Intent are now due on June 29, 2012.

Proposals are now due September 5, 2012.

This change is being made so that the due dates occur on work days. Go to: http://nspires.nasaprs.com/

Questions concerning the Planetary Protection Research Program, may be addressed to

Cassie Conley cassie.conley@nasa.gov 202-358-3912

Comparative Survival Analysis of D. radiodurans and the Haloarchaea N. magadii and H. volcanii Exposed to Vacuum Ultraviolet Irradiation

Comparative Survival Analysis of Deinococcus Radiodurans and the Haloarchaea Natrialba Magadii and Haloferax Volcanii, Exposed to Vacuum Ultraviolet Irradiation

Ximena C. Abrevaya, Ivan G. Paulino-Lima, Douglas Galante, Fabio Rodrigues, Pablo J.D. Mauas, Eduardo Corton, Claudia de Alencar Santos Lage
(Submitted on 29 Sep 2011)

The haloarchaea Natrialba magadii and Haloferax volcanii, as well as the radiation-resistant bacterium Deinococcus radiodurans, were exposed to vacuum-UV (V-UV) radiation at the Brazilian Synchrotron Light Laboratory (LNLS). Cell monolayers (containing 10⁵ - 10⁶ cells per sample) were prepared over polycarbonate filters and irradiated under high vacuum (10^-5 Pa) with polychromatic synchrotron radiation. N. magadii was remarkably resistant to high vacuum with a survival fraction of ((3.77 ± 0.76) x 10^-2), larger than the one of D. radiodurans ((1.13 ± 0.23) x 10^-2). The survival fraction of the haloarchaea H. volcanii, of ((3.60 ± 1.80) x 10^-4), was much smaller. Radiation resistance profiles were similar between the haloarchaea and D. radiodurans for fluencies up to 150 J m^-2. For fluencies larger than 150 J ^-2 there was a significant decrease in the survival of haloarchaea, and in particular H. volcanii did not survive. Survival for D. radiodurans was 1% after exposure to the higher V-UV fluency (1350 J m^-2) while N. magadii had a survival lower than 0.1%. Such survival fractions are discussed regarding the possibility of interplanetary transfer of viable micro-organisms and the possible existence of microbial life in extraterrestrial salty environments such as the planet Mars and the Jupiter's moon Europa. This is the first work reporting survival of haloarchaea under simulated interplanetary conditions.

Full paper

Comments: Draft version (without figures), Accepted for publication in Astrobiology
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Citeas: arXiv:1109.6590v1 [astro-ph.EP]
Submission history
From: Ximena Celeste Abrevaya [view email]
[v1] Thu, 29 Sep 2011 17:02:52 GMT (131kb)