protoplanetary disk


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Related to protoplanetary disk: Proplyd, Debris disks

protoplanetary disk

[‚prōd·ō‚plan·ä‚ter·ē ′disk]
(astronomy)
References in periodicals archive ?
As far as we know, no comets formed in the Oort Cloud, since at these vast distances the density of any matter associated with the Sun's protoplanetary disk must have been vanishingly small.
ALMA's observation sheds important light on how and where this happens in protoplanetary disks when young planets are still forming," co-author Zhaohuan Zhu, an astronomer at Princeton University, New Jersey, said in a (https://public.nrao.edu/news/pressreleases/2016-alma-water-snowline) statement .
Images captured from the observations clearly show a giant gap inside the protoplanetary disk, the largest ever found among lower mass stars similar to the Sun.
These disks are considered the remains of much denser, gas-rich rings of dust, known as protoplanetary disks, that swaddle infant stars.
Batygin calculated how a young star's protoplanetary disk gets torqued by a second star orbiting the first.
The presence of even a single grouping of debris in a protoplanetary disk hints that a more massive object, possibly a planet, might also reside there, Herbst notes.
If a planet has already been formed in a disk, its gravity can produce a density wave, which then may result in the creation of a spiral structure in the protoplanetary disk.
Scientists hope that by studying the protoplanetary disk around TW Hydrae, they would be able to understand exactly how planets form - a process whose exact mechanism is still shrouded in mystery.
That's far longer than any protoplanetary disk could survive.
Instead of taking the slow-and-steady approach to maturity, stars undergo periods where they take on large quantities of matter from their surrounding protoplanetary disk. These violent outbursts alter the theory of stable growth within a star's disk.
The standard model explaining how the solar system formed from a protoplanetary disk, a swirling disk of gas and dust surrounding our Sun, billions of years ago suggests that our planet should be a water world.
The small box marks a protoplanetary disk around a star that may end up like our Sun.