No planetary probe has ever before crash-landed and radioed signals back to Earth.

That was before we had any planetary probes.

Scores of them powered satellites, planetary probes and spy devices, at times with disastrous results.

Several planetary probes have been launched from Site 81.

A number of planetary probes have been launched from Site 200.

"Satellites and planetary probes often exceed their expected lifetimes," he noted.

"Oh, is another quee transmission due from the planetary probe?"

Chinese scientists expect that China will take 20 years to launch independent planetary probes.

In 1961, Venera 1 became the first planetary probe.

C20 Science C1-14 The next generation of planetary probes: economy vehicles.