The Enterprise launches a Class-1 probe.
A Class-1 probe is a type of probe used by Starfleet ships in the late 24th century.
In 2365, the USS Enterprise-D launched a probe of this type with a full sensor platform to study a hole in space, created by Nagilum. (TNG: "Where Silence Has Lease")
Later that year, the Enterprise-D launched a probe to study an energy vortex. This probe was destroyed by the vortex. (TNG: "Time Squared")
Much later that year on Drema IV, an Enterprise survey team suggested that harmonic vibrations emitted by class-1 probes fitted with resonators fired into the planet would shatter the planet's dilithium lattices, and thus alleviate the tectonic stresses that were tearing the planet apart. The plan was a success and the planet was saved from destruction. (TNG: "Pen Pals")
A class-1 probe, with sensor set to maximum scan and modified for planetary probe, was launched into the Romulan Neutral Zone to Nelvana III to scan for signs of a Romulan base on the planet. The probe went into orbit and began to pick up low level subspace radio emissions (TNG: "The Defector")
In 2366, the Enterprise launched a probe of this type to study a closing temporal anomaly before heading to Archer IV. (TNG: "Yesterday's Enterprise")
In 2367, the Enterprise was investigating radiation anomalies in the Gamma Arigulon system that were first reported by the starship LaSalle. When the preliminary readings were inconclusive, and Data couldn't detect abnormalities in Gamma Arigulon's radiant energy, Captain Jean-Luc Picard gave the order to prepare two class-1 probes. However, before the probes were launched, a Klingon attack cruiser de-cloacked, and the captain stopped the launch. (TNG: "Reunion")