id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-3081		Tidal locking - Wikipedia			.html	text/html	5025	675	73	Tidal locking results in the Moon rotating about its axis in about the same time it takes to orbit Earth. When one of the bodies reaches a state where there is no longer any net change in its rotation rate over the course of a complete orbit, it is said to be tidally locked.[2] The object tends to stay in this state when leaving it would require adding energy back into the system. In the special case where an orbit is nearly circular and the body's rotation axis is not significantly tilted, such as the Moon, tidal locking results in the same hemisphere of the revolving object constantly facing its partner.[2][3][4] The exoplanet Proxima Centauri b, discovered in 2016 that orbits around Proxima Centauri, is tidally locked, expressing either synchronized rotation[19] or a 3:2 spin–orbit resonance like that of Mercury.[20]	./cache/en-wikipedia-org-3081.html	./txt/en-wikipedia-org-3081.txt