Essays about: "komet"

Showing result 1 - 5 of 6 essays containing the word komet.

1. 1. 'Oumuamua : An analysis of the the debate regarding the first interstellar visitor

   University essay from Uppsala universitet/Teoretisk astrofysik

   Author : Erik Westergren; [2022]
   Keywords : Oumuamua; asteroid; comet; Avi; Loeb; extraterrestrial; Pan-STARRS; interstellar; alien; vessel; Oumuamua; asteroid; komet; Avi; Loeb; utomjordiskt; PAN-STARRS; interstellär; farkost;

   Abstract : In the year of 2017 in October a strange object with a hyperbolic trajectory was observed in our solar system. There were several hypotheses that scientists used to try to explain what kind of an object it was, but no one could, according to the scientific community as a whole, perpetuate any of these explanations as accepted consensus. READ MORE

3. 2. A kinetic perspective of electron trapping near a weakly outgassing comet

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Chaitanya Prasad Sishtla; [2019]
   Keywords : ;

   Abstract : The European Space Agency’s Rosetta spacecraft followed the comet 67P/Churyumov-Gerasimenko from August 2014 to September 2016, providingobservations of the comet ionosphere at varying heliocentric distances. Measurementsfrom the Rosetta mission have shown a multitude of non-thermalelectron distributions in the cometary environment, challenging the previouslyassumed origin and plasma interaction mechanisms near a cometary nucleus. READ MORE

4. 3. The cosmic-ray events around AD 775 and AD 993 : assessing their causes and possible effects on climate

   University essay from Lunds universitet/Geologiska institutionen

   Author : Florian Mekhaldi; [2014]
   Keywords : cosmic-rays; cosmogenic radionuclides; GICC05; NGRIP; solar proton event; storminess; Earth and Environmental Sciences;

   Abstract : Miyake et al. (2012, 2013) discovered rapid increases of 14C content in tree rings dated to AD 774-5 and AD 992-3 which were attributed to unprecedented cosmic-ray events. These extreme particle events have no counterparts in the instrumental and historical record and consequently praised great interest. READ MORE

5. 4. Relative astrometry and orbit determination

   University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

   Author : Madeleine Burheim; [2014]
   Keywords : Physics and Astronomy;

   Abstract : Att bestämma omloppsbanan för en komet kan svara på många frågor omvårt solsystem, och även resten av universum. Idag använder vi oss av olika algoritmer för att preliminärt kunna beräkna omloppsbanor hos bland annat kometer, men vad krävs egentligen för att få ett någorlunda korrekt resultat? Det finns ett antal olika metoder för att bestämma omloppsbanan hos en komet, men alla är grundade i den äldsta grenen av astronomin;astrometri, vars syfte är att mäta positioner och rörelser hos olika himlakroppar. READ MORE

6. 5. Studying Electron Dynamics using Attosecond Streaking

   University essay from Lunds universitet/Atomfysik

   Author : Stefanos Carlström; [2011]
   Keywords : Attosecond Physics; Streaking; Monte Carlo; GPU; Graphics Processing Unit; Physics and Astronomy;

   Abstract : In this thesis, a program was implemented to study the electron dynamics of photoionization. These dynamics are probed by a streaking infrared field, that modulates the electrons' trajectories. Analytical quantum mechanical calculations for such systems are impossible without approximations or atoms more complex than hydrogen. READ MORE