Sökning: "Mars"

Visar resultat 21 - 25 av 176 avhandlingar innehållade ordet Mars.

  1. 21. Two-spacecraft studies of the plasma environment of Mars

    Författare :Katerina Stergiopoulou; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  3. 22. The Search for Life on Mars - Preparation for Sample Return

    Författare :Tomas Hode; Stefan Bengtson; John Hayes; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap;

    Sammanfattning : The purpose of the thesis work has been to develop methods and concepts to aid in the search, detection and assessment of ancient microfossils here on Earth as a guide to the search for ancient life on Mars. The intention has been to identify and characterize environments on Earth that may be considered analogous to Martian environments and in which fossil preservation is expected to be good, and to develop and apply methods to characterize the isotopic and chemical composition of possible traces of life in order to assess their biogenicity and biological affinities. LÄS MER

  4. 23. The solar wind protons inside the induced magnetosphere of Mars

    Författare :Catherine Dieval; Maria Hamrin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rymdteknik; Space Technology;

    Sammanfattning : Mars is an unmagnetized planet. Mars has no intrinsic magnetic field but has local magnetic anomalies in the crust. The solar wind, which is the plasma flowing from the Sun at supersonic speed, interacts with the magnetic fields of the currents induced in the conductive Martian ionosphere, deviates and slows down to subsonic speeds. LÄS MER

  5. 24. Forsvarstanke og suverenitetsprinsipp : kretsen om Aftenposten i den unionspolitiske debatt 1890 - mars 1905

    Författare :Gunnar Christie Wasberg; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History; Historia;

    Sammanfattning : .... LÄS MER

  7. 25. Instrumentation for energetic Neutral atom measurements at Mars, Venus and The Earth

    Författare :Klas Brinkfeldt; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Energetic neutral atoms; instruments and techniques; mass spectrometry; microchannel plates; solid state detectors; solar wind interaction; planets; magnetosphere; exosphere; ring current; Space physics; Rymdfysik;

    Sammanfattning : This thesis deals with the development and calibrations of sensors to measure energetic neutral atoms (ENAs) at Mars, Venus, and the Earth. ENAs are formed in charge exchange processes between energetic, singly--charged ions and a cold neutral gas. LÄS MER