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2. Orbital velocity - Wikipedia

   en.wikipedia.org/wiki/Orbital_velocity

   Orbital velocity may refer to the following: The orbital angular velocity; The orbital speed of a revolving body in a gravitational field. The velocity of particles due to wave motion, such as those in wind waves; The equivalent velocity of a bound electron needed to produce its orbital kinetic energy

3. Orbital speed - Wikipedia

   en.wikipedia.org/wiki/Orbital_speed

   In gravitationally bound systems, the orbital speed of an astronomical body or object (e.g. planet, moon, artificial satellite, spacecraft, or star) is the speed at which it orbits around either the barycenter (the combined center of mass) or, if one body is much more massive than the other bodies of the system combined, its speed relative to the center of mass of the most massive body.

4. Circular orbit - Wikipedia

   en.wikipedia.org/wiki/Circular_orbit

   The speed (or the magnitude of velocity) relative to the centre of mass is constant: [1]: 30 = = where: , is the gravitational constant, is the mass of both orbiting bodies (+), although in common practice, if the greater mass is significantly larger, the lesser mass is often neglected, with minimal change in the result.

5. Vis-viva equation - Wikipedia

   en.wikipedia.org/wiki/Vis-viva_equation

   In astrodynamics, the vis-viva equation is one of the equations that model the motion of orbiting bodies.It is the direct result of the principle of conservation of mechanical energy which applies when the only force acting on an object is its own weight which is the gravitational force determined by the product of the mass of the object and the strength of the surrounding gravitational field.

6. Two-stage-to-orbit - Wikipedia

   en.wikipedia.org/wiki/Two-stage-to-orbit

   A two-stage-to-orbit (TSTO) or two-stage rocket is a launch vehicle in which two distinct stages provide propulsion consecutively in order to achieve orbital velocity. It is intermediate between a three-stage-to-orbit launcher and a hypothetical single-stage-to-orbit (SSTO) launcher.

7. Orders of magnitude (speed) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

   Approaching velocity of Messier 98 to our galaxy. 192,000: 690,000: 430,000 0.00064: Predicted [needs update] top speed of the Parker Solar Probe at its closest perihelion in 2024. [29] [30] 200,000: 700,000: 450,000 0.00070: Orbital speed of the Solar System in the Milky Way galaxy. 308,571: 1,080,000: 694,288 0.001: Approaching velocity of ...

8. Binary mass function - Wikipedia

   en.wikipedia.org/wiki/Binary_mass_function

   Radial velocity curve with peak radial velocity K=1 m/s and orbital period 2 years. The peak radial velocity is the semi-amplitude of the radial velocity curve, as shown in the figure. The orbital period is found from the periodicity in the radial velocity curve. These are the two observable quantities needed to calculate the binary mass function.

9. Oberth effect - Wikipedia

   en.wikipedia.org/wiki/Oberth_effect

   The greater the velocity of the rocket and payload during the burn the greater is the displacement and the work done, and the greater the increase in kinetic energy of the rocket and its payload. As the velocity of the rocket increases, progressively more of the available kinetic energy goes to the rocket and its payload, and less to the exhaust.