primitive body exploration in th e solar system and...
TRANSCRIPT
PRIMITIVE BODY EXPLORATION IN THE SOLAR SYSTEM AND ASTROBIOLOGY
Hajime YANO
Planetary Science Division, Institute of Space and Astronautical Science3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 JAPAN
Fax: 042-759-8457 E-mail: [email protected](Received 20 August 2002, Accepted 21 August 2002)
Key Words: Asteroids, Astrobiology, Comets, Leonids, Meteors, Meteorites, Micrometeoroids, MUSES-C, SolarSystem Minor Bodies, Planetary Exploration,
AbstractOrigins of planetary systems and life are common goals among astronomers, biologists and planetary scientists.
In the context of planetary exploration, astrobiology can be defined an interdisciplinary subject which answers fp, neand fl parameters for the Drake-Sagan equation. The new concept of habitable zones also demands better understandingof primitive bodies of the solar system while “cosmic dust” is one of the key components that relates all theevolutionary stages (from the birth to the death) of the planetary systems and terrestrial life, for both the pansperminatheory and the Urey-Miller paradigm. In particular, it is essential for us to properly conduct optical and spectroscopicobservations of meteor showers such as the Leonid MAC and in-situ measurement and sample return missions to minorbodies such as MUSES-C, in order to connect between ground observation data of asteroids and comets and analyticaldata of cosmic dust and meteorite samples. For the latter, organic and prebiotic material analyses are important for bothscientific outputs and space quarantine issues. Thus the primitive body exploration program should seek morecollaboration with the astrobioloy community not only within the current program but also for new missions in thecoming decade.
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Fig. 9. Visible-UV spectroscopy of the Leonid fireball in 2001imaged at the Subaru site, Mauna Kea, Hawai’I. (Courtesy: S.Abe, H. Yano, et al.,) [13]
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Ia IbHigh degree of confidence Lesser degree of confidence
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