orbital mechanics n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Orbital Mechanics PowerPoint Presentation
Download Presentation
Orbital Mechanics

Loading in 2 Seconds...

play fullscreen
1 / 11

Orbital Mechanics - PowerPoint PPT Presentation


  • 125 Views
  • Uploaded on

Orbital Mechanics. Orbital Mechanics refers to the general description of how bodies move in force fields (such as gravity) given that energy and momentum are conserved.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Orbital Mechanics' - ostinmannual


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
orbital mechanics
Orbital Mechanics
  • Orbital Mechanics refers to the general description of how bodies move in force fields (such as gravity) given that energy and momentum are conserved.
  • For two spherical objects in which gravity is the only force, this problem is analytic, and both bodies execute elliptical orbits (i.e., they obey Kepler’s laws).
vis viva equation
Vis-Viva Equation
  • Gravity is an attractive force. As you fall toward a body of mass, you speed up; as you move away, you slow down.
  • The Vis-Viva equation is a simple and useful relation describing this interrelation between total orbital speed and proximity to the dominant massive body.
being a rocket scientist
Being a Rocket Scientist!
  • Spaceflight is expensive. Energy is required to lift mass away from the Earth into space ($thousands per kilogram).
  • Question: What is the minimum energy orbit transfer, requiring the minimum fuel to move from one planet to another?
    • Ans: Hohmann orbit transfers.
  • In part, want to take advantage of the fact that the Earth is already moving at about 30 km/sec.
issues for colonizing other worlds
Issues for Colonizing Other Worlds
  • TRAVEL - Getting there and back (cost and time).
  • POLITICS - Who is in charge? Who reaps the benefits? Who “owns”?
  • GRAVITY - What happens anatomically, physiologically, psychologically, and sociologically in terms of future generations born in different gravity (lower g) environs?
  • WATER - Finding, bringing, controlling.
  • ATMOSPHERE - Atmospheres moderate day/night temperature extremes. Also need breathable air. Terra-forming versus building and maintaining specialized habitations.
  • RADIATION/SOLAR WIND/COSMIC RAYS - What if no ozone? What if no magnetosphere? Might have to live underground.