PUZZLE OF COMETARY HINTS AT LARGE UNDISCOVERED orbits OBJECT
"Intrigued by The Fact That long-period comets Observed from Earth orbits seem to follow are not randomly oriented That in space, a scientist at the Open University in the UK These comets is Arguing That Could Be Influenced by the gravity of a large undiscovered object in orbit around the Sun. Writing in the issue of the Monthly Notices of the Royal Astronomical Society published on 11th October, Dr John Murray sets out a case for an object orbiting the Sun 32.000 times farther away Than Earth. It would, howeve, be moving Extremely faint and slow, and so Would Have ESCAPED detection by present and previous searches for distant planets.
Long-period comets originate in Believe To are to vast 'reservoir' of Potential comets, the Oort cloud Known as, surrounding the solar system at distances Between 10.000 and 50.000 About astronomical units from the Sun. (One astronomical unit is the average distance Approximately Between the Earth and the Sun.) They reach the Earth's vicinity in inner solar system when to Their usual, remote orbits are disturbed. Only when near to the Sun do These icy objects grow and eat the tails That Give Them the familiar form of a comet. That Dr Murray notes the comets Reaching the inner solar system include a group coming from directions in space are strung out That Along an arc across the sky. He Argues That This Could mark the wake of Some large body moving-through space in the outer part of the Oort cloud, giving gravitational kicks to comets as it goes.
The object Would Have to Be at least as massive as Jupiter to create a gravitational disturbance large enough to give rise to the Observer Effect, But Currently Favoured Theories of how the solar system can not Easily Formed Explain the Presence of a large planet so far from the Sun. If It Were ten times more massive Than Jupiter, it more akin to Would Be a brown dwarf (the coolest kind of stellar object) Than a planet, brighter, and more likely to Have been detected already."