This means the researchers were able to study the planets before Kepler data was available and estimate the orbit of 1h by using the

orbital velocity of the surrounding planets.

The spacecraft's velocity v will change relative to the Sun as much as its flight direction will change relative to

orbital velocity u of the planet [1-3].

The Karman line, named after Theodore von Karman, who calculated that if you were in an aircraft, and kept going higher, at one point you'd have to be going exactly at

orbital velocity to get the required lift to go any higher.

presented the steps of a nonlinear mathematical procedure for obtaining, from elevation measurements in the field (and in the laboratory), the nonlinear

orbital velocity in directional seas, including the effect of a current;

By calculating a planet's

orbital velocity in a circular orbit, they could then estimate a transit's duration -- how long a planet would take to cross in front of a star.

The intense laser beam focused on the debris will produce high-velocity plasma ablation, and the reaction force will reduce its

orbital velocity, leading to its reentry into the earths atmosphere.

To obtain the

orbital velocity necessary to reach its comet target, the Rosetta spacecraft took advantage of four gravity assists (three from Earth, one from Mars) and an almost three-year period of deep space hibernation, waking up in January 2014 in time to prepare for its rendezvous with 67P/Churyumov-Gerasimenko.

zl](x, t) denote the horizontal- and the vertical-components of large-scale waves'

orbital velocity.

The craft measured their separation five times per second to extreme precision, detecting

orbital velocity changes as small as 0.

But by studying how the starlight shifted as it passed through the atmosphere of exoplanet HD 209458b (illustrated), Dutch researchers found the planet's

orbital velocity.

It is thought that scramjets have the potential to reach top speeds of Mach 24, or

orbital velocity.

Earth is a great place to pick up

orbital velocity.