PPT-Orbits

Why doesn t the Earth fall into the Sun Using orbits to measure masses Recap Midterm 111 Canvas homework due FRIDAY this week Gravity Source of our weight Weight on other planets. Gilani. , J. . Pavoncello. Sponsored by Drs. Ron . Umble. and . Zhigang. . Han.  . Period Orbits on a 120-Isosceles Triangular Billiards Table. Millersville University. The Problem. Find and classify the periodic orbits on a 120 isosceles triangular billiards table.. Garrido. (PUC), Jorge . Cuadra. (PUC), Alberto . Sesana. (AEI) and . Takamitsu. Tanaka (MPA). IAU Symposium 312: “Black Holes and Clusters across cosmic time”. August 2014 @ Beijing. Simulations of a cloud falling onto SMBH binaries: formation of discs. Lecture 05. Prof. Thomas Herring. Room 54-820A; 253-5941. tah@mit.edu. http://. geoweb.mit.edu. /~. tah. /12.540. Satellite Orbits. Treat the basic description and dynamics of satellite orbits. Major perturbations on GPS satellite orbits. at solar neighborhood like location with correct angle . w.r.t. . bar . Hipparcos velocity distribution . Alice Quillen . U Rochester. Collaborators: . Ivan . Minchev. , . Michaela Bagley, . Justin . Garrido. . and Jorge . Cuadra. PUC, Chile. XI SOCHIAS Annual . M. eeting. January 2014. Simulations of a molecular cloud falling into binary SMBHs . Binaries of SMBHs. Supermassive Black Holes (SMBHs) at the center of most massive galaxies.. : 2011-2012. Dawn at Ceres. C. A. Raymond, C. T. Russell, C. A. Polanskey, S. Joy, M. . Rayman. Presentation to the . 9th Small Bodies Assessment Group Meeting. Washington, DC. 11 July 2013. Ceres – A . Comets. one of the most glorious things to see in the sky is a comet.. May be visible for only days, weeks, or months. Comet. : chunks of ice and dust whose orbits are very long, narrow ellipses.. Think of them as a “dirty snowball”. History – Solar Nebula. 1. Dust to . Planetesimals. Grains of . dust . (solids) collide and . adhere. Larger grains grow to . 10. 9. . planetesimals. . of size . 1km . - . gravitationally . bound.  .  .  .  .  . Newton's Law of Gravitation. To find the velocity increment required for various missions, we must calculate trajectories and orbits. This is done using Newton's Law of Gravitation: . What Is an Orbit?. Johannes . Kepler. discovered (in . 1600s. ) that planets orbit in . ellipses, . not . circles.. Satellites (natural or . human-made. ) also orbit Earth in elliptical . pattern.. Elliptical orbits remain fixed in space and Earth spins under a fixed satellite . Resonances. I. Orbital Resonances. A. . Definition. : An orbital resonance occurs when two orbiting bodies exert a _______ and ________ gravitational influence on each other. This usually means that their orbital periods (i.e. the time it takes to make one orbit) are related by a ratio of two _____________.. Comets and asteroids are particularly interesting because of their resemblance to . planetisimals. : the building blocks of the Solar System.. Asteroids are rocky, and most are found between Mars and Jupiter.. Astronomers use light years since the distances in space are so large that, if expressed in km or m, the numbers would be mind boggling.. Light travels 7.5times around the earth in one second.. 1light-year = 9.461×10. for. Peanut. - shaped bars. NGC 7582. Alice Quillen. University of Rochester. Motivation. Large scale photometric, spectroscopic and proper motion surveys will measure properties of a billion stars in the Galaxy.