As the comet's journey along its orbit continues it leaves behind a trail of debris.

Somewhere up there, an hour in the future along his second orbit, Callisto would be moving to meet him.

Now, as the Moon moved slowly along its seventy-nine-day orbit, it was emerging into the full light of day.

"The best way to see what's really going on is to follow the body along its orbit."

Yet it offered no resistance to the buoy's motion along its orbit.

Some hundreds of kilometers behind them, it coasted dead along their orbit.

The specific day helps determine for the equation where along Earth's orbit the location being measured is.

The cloud began to disperse, spreading out along the Moon's orbit.

On average, 16113 Ahmed travels 0.09798994 every day along its orbit, as seen from Earth.

The other two triangles will be located at distant places along Earth's orbit.