You won't believe it, but here is the real gist of the story from that article:
"Professors Matese and Whitmire first proposed the existence of Tyche to explain why many of these long-period comets were coming from the wrong
direction. In their latest paper, published in the February issue of Icarus, the international journal of solar system studies, they report that more
than 20 per cent too many of the long-period comets observed since 1898 arrive from a band circling the sky at a higher angle than predicted by the
galactic-tide theory.
No other proposal has been put forward to explain this anomaly since it was first suggested 12 years ago. But the Tyche hypothesis does have one flaw.
Conventional theory holds that the gas giant should also dislodge comets from the inner Oort Cloud, but these have not been observed."
Astronomers don't know what comets really are. And they don't want to recognize where they actually come from. The so-called Oort Cloud is an
invention to account for their origin from within the solar system. That is way off the mark.
Basically, long-period comets come from other stars. The long-period comets they discuss in the article are cometships that come here and return to
their stars without stopping. Near the Sun they are inertial bodies and allow the Sun to sling them around to return the way they came. Once at the
outer fringe of the solar system, they energize their huge null-mass power units and zip home at plus-light speeds. Almost defies imagination for
most of you, right?