The probe is launched out of the Earth's gravity well into an orbit around the Sun that traces between the Earth's orbit and the target planet's orbit.
(The probe; is launched; out of the Earth's gravity; well into an orbit around the Sun) (an orbit around the Sun; traces; between the Earth's orbit and the target planet's orbit)
The probe an orbit around the Sun
is launched traces
out of the Earth's gravity well into an orbit around the Sun
between the Earth's orbit and the target planet's orbit