Interplanetaarisen pölyn fysikaaliset ominaisuudet

Project Details

Description (abstract)

Interplanetary dust recovered on Earth in form of interplanetary dust particles or micrometeorites is, together with larger meteorites,
valuable source of primitive extraterrestrial material. Reliable determination of cosmic dust’s physical properties and internal structure
is an issue of key importance in planetology. Interplanetary dust represents material released from comets and asteroids into
interplanetary space. It carries important information about composition and structure of cometary dust or coma as well as of asteroid
surface. An X-ray microtomography (XMT) technique will be used to measure physical properties as bulk and grain density, porosity and
internal structure of several dozens of interplanetary dust particles and micrometeorites. Compared to previously used techniques as
scanning electron microscope observations, XMT is nondestructive an provides truly 3D image of the studied samples. Improved
knowledge of interplanetary dust’s physical properties will aid in determination of interplanetary dust composition and origin as well as
in interpretation of ground based or space based observation of comets and asteroids.
Effective start/end date01/09/201231/08/2015