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Debris Disk Simulations Generate Spirals, Rings and Arcs

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When exoplanet scientists first spotted patterns in disks of dust and gas around young stars, they thought newly formed planets might be the cause. But a recent NASA study cautions that there may be another explanation: one that doesn’t involve planets at all.
An alternative explanation suggests the dust and gas in the disk can form the patterns themselves when they interact with starlight.
When high-energy UV starlight hits dust grains, it strips away electrons. Those electrons collide with and heat nearby gas. As the gas warms, its pressure increases and it traps more dust, which in turn heats more gas. The resulting cycle, called the photoelectric instability (PeI), can work in tandem with other forces to create some of the features astronomers have previously associated with planets in debris disks.

A 2013 study suggested PeI could explain the narrow rings seen in some disks. The model also predicted that some disks would have arcs, or incomplete rings, which weren’t directly observed in a disk until 2016.

The new simulation includes an additional new factor: radiation pressure, a force caused by starlight striking dust grains.

Light exerts a minute physical force on everything it encounters. This radiation pressure propels solar sails and helps direct comet tails so they always point away from the Sun. The same force can push dust into highly eccentric orbits, and even blow some of the smaller grains out of the disk entirely.

The new research modeled how radiation pressure and PeI work together to affect the movement of dust and gas, and also found that the two forces manifest different patterns depending on the physical properties of the dust and gas.

Credit: NASA’s Goddard Space Flight Center/Scott Wiessenger

Music: “Hyperborea” from Killer Tracks.

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9 Comments

9 Comments

  1. Bangersnsmash Uk

    January 11, 2018 at 7:53 pm

    Thats nice, Now tell us what you know about the imminent ice age threat!

  2. دوق فليد

    January 11, 2018 at 8:14 pm

    الشفق وأصل الكون

    We will talk about the edge of the universe ،It is the great explosion that created the universe ،This astronomers have discovered cosmic background radiation ،The cosmic background radiation is the twilight of the great explosion at the edge of the universe .Space centers must send spacecraft To the Twilight sites of the Great Explosion To explore space far beyond the twilight of the Big Bang ،If we discover a space beyond the twilight ،This would be evidence of a space before the great explosion . We ask you to send reconnaissance devices to visit the Twilight sites of the Great Explosion On the edge of the universe In order to discover a space beyond the twilight ،If we discover a space beyond the twilight This is evidence of a space before the great explosion and the birth of the universe . This discovery will help us to know the origin of the universe Or the discovery of these multiple universes
    .

  3. lillian ballard

    January 11, 2018 at 8:39 pm

    Counter clockwise. God is left handed? No planets needed? Aww, shucks, even the Martians and Humans not needed. Maybe God,our creative force, is a she? Or both,man and woman since we have male/female or positive/negative in our bodies. Love is both,mmm…

  4. Mohmdyn Ali

    January 11, 2018 at 9:18 pm

    Black water?

  5. OrphanPaper

    January 12, 2018 at 12:37 am

    so speed relative to distance means the entering mass is all the same density other wise it would change speed proportional to that changing density of the matter ,and the expansion ratios of the exciting heat /energy integrated with the masses heat coefficient over the sphere

  6. lillian ballard

    January 12, 2018 at 12:48 am

    Just kidding around. It is good graphics. Enjoyed it. Thxs

  7. Рафис Фахрутдинов

    January 12, 2018 at 2:40 am

    Спасибо.

  8. Gray Sloth

    January 12, 2018 at 8:33 am

    You Cannot Grasp the True Form of Giygas' Attack

  9. Landscape

    January 12, 2018 at 11:46 pm

    ??

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New Planet

Nibiru today – But it

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Nibiru today – But it

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There are now five different lines of observational evidence pointing to the existence of Planet Nine,” said Konstantin Batygin, a planetary astrophysicist at Caltech in Pasadena.

Some of these clues relate to the gravitational tug of Planet Nine, which appears to be disturbing the distant Kuiper Belt, which is made up of icy objects and stretches from Neptune out into deep space.

Its believed Planet Nine is a “super-Earth”, the name for a type of large world which appears to be very common in the universe.

Doom-mongers have consistently claimed that a hidden world called Nibiru will crash into Earth.

Nasa has denied this theory, previously writing: “The planet in question, Niburu, doesn’t exist, so there will be no collision.

“The story of Niburu has been around for years (as has the ‘days of darkness’ tale) and is periodically recycled into new apocalyptic fables.”

However, it’s feared Planet Nine will eventually destroy the solar system by causing a devastating “death dance”.

It could one day hurtle through our solar system, sending planets “pinballing” into outer space or plunging into the Sun.

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New Planet

DON’T BE SCARED – WATCH This VIDEO Before IT’S TOO LATE!!!

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DON’T BE SCARED – WATCH This VIDEO Before IT’S TOO LATE!!!

There are now five different lines of observational evidence pointing to the existence of Planet Nine,” said Konstantin Batygin, a planetary astrophysicist at Caltech in Pasadena.

Some of these clues relate to the gravitational tug of Planet Nine, which appears to be disturbing the distant Kuiper Belt, which is made up of icy objects and stretches from Neptune out into deep space.

Its believed Planet Nine is a “super-Earth”, the name for a type of large world which appears to be very common in the universe.

Doom-mongers have consistently claimed that a hidden world called Nibiru will crash into Earth.

Nasa has denied this theory, previously writing: “The planet in question, Niburu, doesn’t exist, so there will be no collision.

“The story of Niburu has been around for years (as has the ‘days of darkness’ tale) and is periodically recycled into new apocalyptic fables.”

However, it’s feared Planet Nine will eventually destroy the solar system by causing a devastating “death dance”.

It could one day hurtle through our solar system, sending planets “pinballing” into outer space or plunging into the Sun.

#NIBIRU #NIBIRU2017 #NIBIRUPLANETX #PLANETX #NIBIRUTODAY #NIBIRUWARNING #BREAKING #NIBIRUNEW

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New Planet

Planet X Nibiru Shocking Update NIBIRU SCARY than we think it will Delete the Earth, What Happend

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Planet X Nibiru Shocking Update NIBIRU SCARY than we think it will Delete the Earth, What Happend

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The real story of Nibiru (Planet X)

First we go once again back to the creation story of Mesopotamia

The SUMERIANS always described their Gods as planets starting with Pluto, then Neptune, Uranus, etc., as if they were seeing the planets from a heavenly body (or spacecraft ?) that was entering our solar system from the outside.

The Sumerian seal (below), with the planets Mercury, Venus, Earth, Moon, Mars, Unknown ( about size of Uranus/Neptune), Jupiter, Saturn, Indeterminate (about size of Mercury), Uranus, Neptune, Pluto.

The SUMERIANS also mentioned a “twelfth” planet called “NIBIRU”, one whose elliptical orbit brought it close to Earth for a brief period about every 3,600 years.

The Sumerians and later also the Babylonians mention about a long time ago in Ancient times in which Nibiru (Marduk), until that time a stranger in our solar system, had a fight in heaven with Tiamat and Kingu. At that time, millions of years ago, the satellites of Nibiru (Marduk) collapsed with Tiamat (a planet at least two times the mass of Earth) and broke it in 2 parts.

In accordance to the theory of Zecharia Sitchin and others, the 2 parts of Tiamat were forced to another orbit around the Sun, One part was broken in small parts and are now called The Asteroid Belt (between Mars and Jupiter) and Asteroids Meteorites and Comets. The other part was forced into his new orbit between Venus and Mars and became the Earth. Kingu became the Moon of the “new planet” Earth. Nibiru was forced into an elliptical orbit around the Sun and its new orbit was from that time on a cycle of 3,600 years around the Sun.

Before I unfold my theory about the timeline of the above events and what happened afterwards I like to honor first the writer of “The Earth Chronicles” Zecharia Sitchin for his great in depth study of the Sumerian and Babylonian history and his theory of which most I agree.

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