... Other comets, including most of the ``great'' ones, appear to travel in parabolic or, in a few cases, hyperbolic orbits, which, not being closed curves, never bring them back again... 
Garrett Serviss 「Curiosities of the Sky」
...Some observersare disinclined to admit the accuracy of this statement; whilst othersbelieve that the stars have executed a hyperbolic sweep round theircommon centre of gravity and are now separating...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...Cometswith parabolic and hyperbolic orbits may be regarded as stray objectswhich visit our system once, and depart never to return again...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...Some of these objects might perhaps revolve in hyperbolic orbits, andretreat never to return; while others would be driven into ellipticpaths...
Robert Stawell Ball 「The Story of the Heavens」
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