As it looks now, you would think there are two perihelia and two aphelia.    From Wordnik.com.  [Rabett Run] Reference

Jupiter in aphelia in 2011, the strongest solar maximum per last 400 years - forecasted on 2011, 2012 even by official astronomers.    From Wordnik.com.  [Universe Today] Reference

Their aphelia -- or the farthest points of their orbits from the sun -- are usually, if not invariably, situated so near to the path either of.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference

The two last-named comets would likewise seem to have a period of revolution not exceeding five or six years, and their aphelia are in the vicinity of Jupiter's orbit.    From Wordnik.com.  [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference

It is well known that those of moderately short periods are, for a reason already explained, connected with the larger planets in such a way that the cometary aphelia fall near some planetary orbit.    From Wordnik.com.  [A Popular History of Astronomy During the Nineteenth Century Fourth Edition] Reference

It was Euler also who demonstrated that within certain fixed limits the eccentricities and places of the aphelia of Saturn and Jupiter are subject to constant variation, and he calculated that after a lapse of about thirty thousand years the elements of the orbits of these two planets recover their original values.    From Wordnik.com.  [A History of Science: in Five Volumes. Volume III: Modern development of the physical sciences] Reference

3/2 power rule for the planets is only approximate when, in the very next sentence, he remarks, “But this second part of the proposition is proved with the greatest exactness from the fact that the aphelia are at rest.”.    From Wordnik.com.  [Newton's Philosophiae Naturalis Principia Mathematica] Reference

Other short-period comets have aphelia within the.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference