Also that velocity, v, in that equation number five will also change with time because it's an elliptical orbit.

同样的，第五个方程序，中的速度同样，会随时间改变，因为这是椭圆形轨道。

youdao

Rocket Men: Saturn V, which carried the Apollo 11 Moon mission, climbs toward orbit after lift-off in a photograph taken from a plane monitoring the launch.

执行阿波罗11号登月任务的土星5号正在飞向自己运行的轨道，此照片由负责监测发射的飞机拍摄。

youdao

In 1960, at Cape Canaveral, Pioneer V was launched into orbit around the sun.

CNN: Wednesday,

The Landsat satellite was boosted into orbit by an Atlas V rocket shortly before 11:30 a.m. local time, more than an hour after lifting off from Vandenberg Air Force Base under mostly clear skies.

NPR: Latest Earth Satellite Launches From Calif. Coast

At 180 feet tall and 12 feet in diameter, the Falcon 9 rocket is tiny in comparison to the football-field-long Saturn V rockets that carried Apollo spacecraft into orbit.

CNN: Historic launch of private rocket heralds new era