Venus Gravity Assist
VENUS GRAVITY ASSIST
INTERPLANETARY SLINGSHOT
Kinetic Energy Transfer
By flying close to Venus, a spacecraft can exchange momentum with the planet to change its velocity without using fuel.
90% of Earth's gravity.
Massive fuel savings.
Gravity Assist
Orbital Momentum Theft. Leveraging the mass of Venus to accelerate toward the outer reaches or decelerate toward the Sun.
- š Delta v Boost: Up to 7.3 km/s per flyby.
- šÆ Precision: Targeting the periapsis within Ā±2 km.
- āļø Solar Target: Essential for reaching Mercury or the Sun.
Inward Assist
Solar Braking. Using Mercury's gravity as a tether to dump orbital velocity and spiral toward the Sun's inner corona. =
- š Speed Shed: Massive reduction in heliocentric energy.
- š Resonance: Often requires 6+ flybys for orbital insertion.
- š„ Thermal Load: 10x Earth's solar intensity during flyby.
Outward Sling
The Great Accelerator. Harnessing the angular momentum of the King of Planets to punch through the outer solar system and into the void.
- š Delta v Peak: The highest potential boost in the solar system.
- ā¢ļø Rad-Hardened: Must withstand Jupiter's lethal radiation belts.
- šŖ Escape Vel: Essential for Interstellar escape trajectories.
Assist Logic
Zero-Fuel Propulsion. By interacting with the gravity well of Venus, we turn planetary mass into kinetic energy.
- ā½ Fuel Savings: Saves 100s of kg in propellant mass.
- š Plane Change: Easy adjustment of orbital inclination.
- š Mission Life: Less fuel used means more for mid-mission steering.
Paper
ORBITAL LOG: SLINGSHOT š
Transfer Type: Interplanetary. Gravity Well: Venus (0.9G).
Sources
PARKER SOLAR PROBE
Uses 7 Venus flybys over 7 years to shrink its orbit and "touch" the Sun's corona.
FLYBY SCHEDULEDELTA-V MATH
Calculations on how planetary mass and approach angle determine the velocity change (Delta v).
ORBITAL PHYSICSBEPICOLOMBO PATH
How the ESA/JAXA mission used Venus to lose enough energy to be captured by Mercury's gravity.
INNER SYSTEM LINKSOrbital Entry
Future orbital missions designed to map the hidden surface using radar.
Solar Assist
Utilizing Venus to bleed off orbital energy and "fall" closer to the Sun.
Outer Path
Mission: JUICE (ESA)
Target: Jupiter Icy Moons
Benefit: Massive fuel savings via Delta-V boost.