Sökning: "comets"
Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet comets.
1. Gas Production in Distant Comets
Sammanfattning : Molecular spectroscopy at radio wavelengths is a tool well suited for studying the composition and outgassing kinematics of cometary comae. This is particularly true for distant comets, i.e. comets at heliocentric distances greater than a few AU, where the excitation of molecules is inefficient other than for rotational energy levels. LÄS MER
2. Thermophysical Modelling and Mechanical Stability of Cometary Nuclei
Sammanfattning : Comets are the most primordial and least evolved bodies in the Solar System. As such, they are unique sources of information regarding the early history of the Solar System. However, little is known about cometary nuclei since they are very difficult to observe due to the obscuring coma. LÄS MER
3. From meteors to space safety : dynamical models and radar measurements of space objects
Sammanfattning : Every day the Earth's atmosphere is bombarded by 10-200 metric tons of dust-sized particles and larger pieces of material from space called meteoroids. Dust and meteoroids come from parent bodies such as comets and asteroids, which are remnants from the formation of the solar system. LÄS MER
4. Low-energy ions around comet 67P/Churyumov-Gerasimenko
Sammanfattning : Low-energy ions play important roles in the formation of the plasma environment around a comet. Reliable ways of measuring these ions are therefore of high importance to fully understand the processes and dynamics of this environment. Unfortunately, low-energy ions are infamously difficult to detect. LÄS MER
5. Dissertatio de cometis quam consensu amplissimi collegii philosophici in regia Ubsalensi academia præside ... Jona Fornelio ... pro honor. philosoph. publico examini submittit Matthias Iser, Vermel. In audit. Gust. ad diem 27. Novemb. 1672. Hor. a m. consvetis
Sammanfattning : .... LÄS MER