manacle
n
(usu pl 通常作复数) one of a pair of chains or metal bands for binding the hands or feet; fetter 手铐; 脚镣; 束缚. manacle, v [Tn]
bind (sb/sth) with manacles 给(某人[某物])上镣铐或加束缚.
A telescope would have to be as far away as the planet Jupiter to look for life in outer space, because the dust becomes thinner the further we travel towards the outer edges of our own solar system.