SlideServe
Télécharger Obtenir Pro
Menu
Accueil Pro
Préférences
ApparenceLight Aide et commentaires
© SlideServe · v2026

More About Orbits

louie avatar
louie
26 diapositives · 428 Views · Jul 16, 2014

Orbits can take the form of ellipses, parabolas, or hyperbolas, all classified as conic sections. Key to orbits is the concept of escape velocity, the minimum speed needed for an object to break free from a celestial body's gravitational pull. For Earth, this velocity is 11 km/s or 25,000 mph. Objects below this speed follow elliptical paths, while those reaching escape velocity travel in parabolic orbits, and those surpassing it move in hyperbolic orbits. Additionally, the phenomenon of gravity assist allows spacecraft to gain speed or redirect by utilizing the gravitational pull of massive bodies, enhancing mission efficiency.

#more about orbits #more about orbits ppt #powerpoint #presentation
More About Orbits - slide 1
01 / 26More About Orbits
1 / 17

Télécharger la présentation

More About Orbits
Une image / un lien ci-dessous est fourni (tel quel) pour télécharger la présentation

Politique de téléchargement : le contenu du site vous est fourni TEL QUEL pour votre information et votre usage personnel ; il ne peut être vendu, concédé sous licence ni partagé sur d’autres sites sans l’accord de son auteur.Le contenu vous est fourni TEL QUEL, pour votre information et votre usage personnel uniquement. Téléchargez la présentation en cliquant sur ce lien. Lors du téléchargement, si vous ne parvenez pas à télécharger une présentation, l’éditeur a peut-être supprimé le fichier de son serveur.Pendant le téléchargement, si vous ne parvenez pas à obtenir une présentation, le fichier a peut-être été supprimé par l’éditeur.

F I N

Plus de contenu associé

Transcription de la présentation

  1. More About Orbits Orbits can be ellipses, parabolas or hyperbolas

  2. All Orbit Shapes are Conic Sections

  3. Why Do We Call it a “Focus?”

  4. Escape Velocity • Every object has an escape velocity • Anything launched with less than escape velocity will fall back • Anything launched with greater than escape velocity will keep going and never return • Escape velocity from Earth’s surface is 11 km/sec or 25,000 miles per hour. • For anything in a circular orbit, escape velocity is 1.4 times its orbital velocity.

  5. Orbits and Escape Velocity • Anything moving with less than escape velocity will travel in an elliptical orbit • Anything moving exactly with escape velocity will travel in a parabolic orbit (Think of it as an infinitely long ellipse) • Anything moving with more than escape velocity will travel in a hyperbolic orbit

  6. Orbits and Escape Velocity

  7. What About Three Objects? • Kepler and Newton solved the problem of one object orbiting about another • Are there formulas for three interacting bodies? • Bottom Line: No (After much effort) • Except for a few special cases...

  8. The Lagrangian Points

  9. Gravity Assist • Gravity assist happens naturally. It can capture comets into short-period orbits or expel them from the Solar System • We use gravity assist to speed up, slow down, or redirect spacecraft • The Cassini mission to Saturn was launched with only one-fifth the energy needed to reach Saturn

  10. We’re Pretty Good At It

  11. In Gravity Assist, a Massive Object Causes a less Massive One to Speed Up or Slow Down

  12. Gravity Assist Can Speed Objects Up

  13. Gravity Assist Can Slow Things Down