The arrival of a spacecraft on the surface of a planet(noun)
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Use "planetfall" in a sentence
"This is a good adventure, if only slightly marred by using the symbolic idea of "male companion energy" rather than science as a motive for the female tree creature that lures the pilot on his focused quest to planetfall."
"Not only can you “beam” (excellent word by the way) to other places, but you can avoid that whole thing with making planetfall or taking off again."
""One reason why we include the youngsters on planetfall assignments as often as possible.""