List of Questions
217 probes were launched toward the Moon, the neighbouring planets and the outer giants as well as to minor bodies (asteroids and comets). Two-fifth of them failed to accomplish their mission.

There are also 116 astronomy and solar satellites (which observed the Universe from Earth orbit) and 355 Earth/space science satellites.

(See lists of Planetary Probes, of Astronomy Spacecrafts and of Earth/space Science Spacecrafts.)
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