According to ALSEP Flight System Familiarization Manual, p. 2-166, some Apollo missions carried a grenade launcher and 4 grenades. What were these used for?
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asked Jul 29, 2019 at 14:58
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$\begingroup$ For the seismic experiments $\endgroup$– user20636Jul 29, 2019 at 15:04
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1$\begingroup$ See space.stackexchange.com/a/37774/6944 $\endgroup$– Organic MarbleJul 29, 2019 at 15:05
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41$\begingroup$ Even more fun, Apollo 14 didn't use their grenades, and they are still on the lunar surface. $\endgroup$– DrSheldonJul 29, 2019 at 19:02
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3$\begingroup$ Due to an influx of joke comments, all joke comments on this post will be deleted. However, we would appreciate your sense of humor in chat if you want to drop by! $\endgroup$– called2voyage ♦Jul 31, 2019 at 16:49
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$\begingroup$ Have any of them been used? $\endgroup$– Everyday AstronautAug 1, 2019 at 10:17
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1 Answer
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They were part of an active seismic imaging experiment (archived version on wayback)
By setting up a seismometer and setting off surface explosions of known size, you can get a lot of information about how shockwaves propagate underground, from which you can infer structure.
answered Jul 29, 2019 at 15:06