Sökning: "jorden solsystemet"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden jorden solsystemet.

  1. 1. Potassium in the Galactic Bulge - as traced by microlensed dwarf & sub-giant stars

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Lukas Jönsson; [2023]
    Nyckelord :Nucleosynthesis; Galactic Bulge; Potassium; Non-Local-Thermal-Equilibrium; Physics and Astronomy;

    Sammanfattning : During this report the potassium (K) trend in the Galactic Bulge, with respect to metallicity and various α-elements, has been computed and evaluated by a method of line synthesis on the 7698.96 ̊A KI line (7699 KI), where Non-Local-Thermal-Equilibrium (NLTE) effects have been considered. LÄS MER

  3. 2. Search for Preserved Methanogenic Organisms in Ophiolitic Rocks through Lipid Biomarker Analysis – Implications for Astrobiological Explorations

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Zetterlind; [2020]
    Nyckelord :ophiolite; deep biosphere; archaea; methanogenesis; chemosynthesis; serpentinite-hosted ecosystems; lipid biomarkers; astrobiology; ofiolit; djupbiosfär; arkeér; metanogener; kemosyntes; serpentinit-drivna ekosystem; lipidbiomarkörer; astrobiologi;

    Sammanfattning : Serpentinization is a metamorphic low-temperature geological process, involving a series of chemical reactions that hydrate ultramafic rocks into serpentines and other minerals such as magnetite and brucite. Moreover, the process produces heavily reducing and highly alkaline fluids together with molecular hydrogen (H2) and methane (CH4), which have the capacity to support chemosynthetic microbial life. LÄS MER

  4. 3. The Solar System Around a Binary Star

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Jesper Nielsen; [2019]
    Nyckelord :planetary system stability; binary star; Physics and Astronomy;

    Sammanfattning : The observations of circumbinary planets have confirmed that these can in fact be stable. While previous studies on circumbinary planets have been done, not many have been made on systems containing multiple circumbinary planets on eccentric orbits. LÄS MER

  5. 4. Fast-forward the Sedimentation of Solid Particles in Protoplanetary Disks

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Eric Andersson; [2017]
    Nyckelord :protoplanetary disk sedimentation simulation particle-mesh adaptive particles; Physics and Astronomy;

    Sammanfattning : Numerical simulations have become an essential tool for studying particle-gas systems. One such system is the protoplanetary disk consisting of vast number of solid particles interacting with the surrounding gas. LÄS MER

  7. 5. Statistical analysis of the electric field measurements from the Rosetta spacecraft in the plasma environment of comet 67P/Churyumov-Gerasimenko

    Master-uppsats, KTH/Rymd- och plasmafysik

    Författare :Guillame Dickeli; [2017]
    Nyckelord :;

    Sammanfattning : Comets are a key to understanding the early stages of the solar system. They were hereat its formation and have not evolved ever since, which means they are our best shotat learning the processes that led to the formation of the solar system as we know ittoday. Yet, our knowledge about these bodies is very limited. LÄS MER