Oort cloud


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Related to Oort cloud: Kuiper belt, Sedna

Oort cloud

 (ôrt)
n.
A swarm of comets orbiting the sun at a distance of one to two light years, proposed as a source of comets that pass near the sun.

[After Jan Hendrix Oort (1900-1992), Dutch astronomer.]

Oort cloud

(ôrt, ōrt)
A sphere-shaped mass of comets that makes up the outer edge of the solar system, surrounding the Kuiper belt and the planets. The more than 100 billion comets in this region orbit the sun at a distance of one to two light-years. Comets from this area that come into the inner solar system take more than 200 years to make one complete orbit. Compare Kuiper belt.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Oort cloud - (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun
astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
aggregation, collection, accumulation, assemblage - several things grouped together or considered as a whole
Translations
References in periodicals archive ?
Oumuamua may have also come from a cluster of small objects outside the Solar System similar to the Oort Cloud, which is believed to have been created by Jupiter.
In about 300 years, Stone said, they will enter the Oort cloud, a distant reservoir of comets orbiting the sun.
Scientists maintain the solar system stretches to the outer edge of the so-called Oort Cloud. It will take about 30,000 years for the spacecraft to get that far.
The two probes have not officially exited the solar system, whose outermost region is a shell called the Oort Cloud comprised of numerous small icy objects still under the sun's gravitational influence.
"The boundary of the solar system is considered to be beyond the outer edge of the Oort Cloud, a collection of small objects that are still under the influence of the Sun's gravity."
"If you go to the outer edge of our solar system you reach the Oort Cloud, it's the boundary.
Thousands -- even a million -- more such objects could be way out there orbiting in the so-called Inner Oort Cloud, according to the researchers.
Since this star will clip the Oort Cloud inside the aphelion of the putative, Neptune-size, and as-yet-optically-unverified "Planet Nine," it seems to me the potential for great catastrophe exists.
Known as K2, the comet has already been travelling for millions of years from its birthplace in the Oort Cloud, a shell of icy objects almost a light year across on the solar system's outermost fringes.
Which astrological phenomena are found in millions in the Oort cloud beyond Pluto?