trans-Neptunian object

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trans-Nep·tu·ni·an object

 (trăns′nĕp-to͞o′nē-ən, -tyo͞o′-, trănz′-)
n. Abbr. TNO
A celestial object that orbits the sun at a greater distance on average than Neptune.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
These detached objects are members of the larger family of trans-Neptunian objects (TNOs), bodies that orbit beyond Neptune's orbit.
Barring discovery of a giant trans-Neptunian object, the planets will remain as Holst knew them.
This is the first trans-Neptunian object with a retrograde orbit, though 17 asteroids closer in are also headed the wrong way around the Sun.
The document may be of interest to readers in light of Pluto's widely publicized status as the first known trans-Neptunian object. An electronic image of the Lowell Circular is posted at ~jmontani/pluto_disc.jpg.
In 1992, over a thousand trans-Neptunian objects (TNOs) were discovered beyond the orbit of Pluto.
Comet Iwamoto is part of the class of solar system bodies called the Extreme Trans-Neptunian Objects, according to ( .
Neptune and the other giant planets gravitationally influence the objects in the Kuiper Belt and beyond, collectively known as trans-Neptunian Objects (TNOs), which encircle the Sun on nearly-circular paths from almost all directions.
The orbits of the six extreme trans-Neptunian objects (in magenta) are mysteriously aligned in one direction, a configuration which can be explained by the presence of a Planet Nine (in orange) in our solar system, according to the Caltech Astronomers.
The Madrid university professor's study looked at rocks known as extreme trans-Neptunian objects.
BAA observation of Uranus & Neptune has now been transferred to the Saturn Section, and 'remote planets' refers to Pluto and the other trans-Neptunian objects. But even this could be changing as more and more planets are discovered round other stars: should the ARPS also take on the extrasolar planets, the remotest worlds of all?
Testing gravity in the outer solar system: results from trans-neptunian objects. Astrophysical Journal, 2007, v.

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