In astrophysics, accretion is the accumulation of particles into a massive object by
gravitationally attracting more matter
, typically gaseous matter, in an accretion disk. Most astronomical objects, such as galaxies, stars, and planets, are formed by accretion processes.
Where and how does accretion happen?
Accretion is the process in which material from the outer plate and trench
(during the periods of discontinuous subduction) is removed and added to the outer continental margin or by other mechanisms such as imbricate thrusting or a combination of folding and thrusting
(Karig, 1974; Karig and Sherman, 1975).
How does accretion occur?
Accretion involves
the addition of material to a tectonic plate via subduction
, the process by which one plate is forced under the other when two plates collide. The plate which is being forced down, the subducted plate, is pushed against the upper, over-riding plate.
What is accretion and when does it occur?
In astrophysics, accretion is
the accumulation of particles into a massive object by gravitationally attracting more matter
, typically gaseous matter, in an accretion disk. Most astronomical objects, such as galaxies, stars, and planets, are formed by accretion processes.
Where does the process of accretion begin?
Instead of just sitting still in space,
the bits of gas and dust will eventually start colliding with each other
. Some of the dust will stick to other bits of dust and form larger chunks of matter. This sticking together is the beginning of the process of accretion.
What is an example of accretion?
Accretion is defined as the part of something that has been added. An example of an accretion is
the garage someone may build on his home
. … The definition of accretion is the state of having gone through extension or addition of length or overall size.
What is the difference between accretion and condensation?
What is the difference between the processes of condensation and accretion? Condensation is the building of larger particles one atom (or molecule) at a time,
whereas accretion is the sticking together of larger particles
. … The planets swept up gas, dust, and small particles.
What force is needed for accretion?
In astronomy, the force responsible for accretion is
gravity
.
What’s the opposite of accretion?
Opposite of growth or increase by the gradual accumulation of additional layers or matter.
abatement
.
decline
.
decrease
.
decrement
.
What is the importance of accretion?
Explanation: Accretion, the gradual clumping together of dust, rocks and meteorites into larger and larger bodies,
eventually creates rocky planets
, provided no larger gravitational bodies stop the process.
What is wrong with the accretion theory?
Most scientists agree that core accretion is how terrestrial planets such as Earth and Mars were created, but the model can’t convincingly explain how gas giant planets like Jupiter and Saturn came to be. One major problem is that
developing gas giants through core accretion takes too long
.
What is an accretion schedule?
In finance, accretion is also
the accumulation of additional income an investor expects to receive after purchasing a bond at a discount and holding until maturity
. The accretion rate is determined by dividing a bond’s discount by the number of years in its term to maturity.
What is formed through accretion?
In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, in an accretion disk. Most astronomical objects,
such as galaxies, stars, and planets
, are formed by accretion processes.
What are accretion rights?
Land that is added by accretion is
generally recognized to be owned by the person that owns the original bank or shore
. … A change in the course of a river or stream due to avulsion does not change the respective property rights of the owners whose land borders the river or stream.
What is the accretion line?
The term accretion is used in real estate law to refer to
an increase of land due to the accumulation of soil on the shoreline of a lake
, stream, or the sea. While accretion is a gift bestowed on landowners by Mother Nature, land can also decrease in size through erosion and avulsion.
What does avulsion mean?
Avulsion:
Tearing away
. A nerve can be avulsed by an injury, as can part of a bone.
