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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.

This video is public domain and along with other supporting visualizations can be downloaded from the Scientific Visualization Studio at:

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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

8 Signs You’re Meant For Something Bigger On This Planet Don’t Ignore Them

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Your DNA ACTIVIATION , Any Help ? Like & Subscribe Please .
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Awakening Your Cosmic-Self
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Activating Inner Potentials
Tapping into Possibilities
Bridging Answers

Copyright – DNA ACTIVIATION- 2016/2017 .

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New Planet

Six-year-old girl urges NASA to `make Pluto a planet again`

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Six-year-old Cara O’Connor of Ireland, who dreams of becoming a NASA astronaut one day, wrote a letter to the space agency urging it to reclassify Pluto as a planet,The Washington Post reported this week. Pluto was downgraded from a planet to a dwarf planet in 2006 by the governing body of astronomy, the International Astronomical Union (IAU).

The decision has not gone down well with Cara and she wants NASA to “fix this problem” for her and “make Pluto a planet again.” “I listened to a song and at the end of it the song said “Bring Pluto Back” — and I would really like that to happen,” Cara wrote. She talked about the Kuiper belt, a doughnut-shaped ring beyond Neptune where many dwarf planets are located, the Postreported on Saturday.

“I really think Pluto should be a main planet again like Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus & Neptune, because in one video I watched called ‘Let’s go meet the planets,’ Pluto was at the very end,” she wrote. In another video, she said, Pluto “was put in the trash can and was scared by planet Earth.”

“This was really mean,” Cara wrote, “Because no one or no planet or dwarf planets should be put in the trash can.” Cara’s plea did not fall on deaf ears as she received a reply from James Green, Director of NASA’s Planetary Science Division, who complimented her on her interest in Pluto.

“I agree with you that Pluto is really cool — in fact, who would have believed that Pluto has a heart? … It’s a fascinating world that appears to be constantly changing. To me, it’s not so much about whether Pluto is a dwarf planet or not; it’s that Pluto is a fascinating place that we need to continue to study,” Green wrote.

“I hope that you will discover a new planet, and I trust that if you continue to do well in school we will see you at NASA one of these days,” he added.

Credit: Nasa

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New Planet

The APOCALYPSE is here | Planet X | Bible | Research | David Meade

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This is a new video from the channel – Space and Beyond.

In this video I will be proving that the webcams I use aren’t fake. I will also show images that people have sent me showing planet X, chem trails, etc. I will also be showing the changes that are happening to earth (earthquakes, volcanoes and more.)

———————————————————————————————————–
| WHY VOICE AUDIO?

| I use a voice audio because many people whom have been
trying to show the truth, have later many problems. For | example Matt Rogers (sky watcher showing the truth) had said that people had tried to silence him ( I have a
| family and so It’s important for me to keep my identity a
secret. If people know what my true voice would be then it
| would be easier for them to find who or where I am (this could
be anyone.) As we know family comes first and so it’s very
| important for me. I hope you all understand.
———————————————————————————————————

Please LIKE SHARE SUBSCRIBE COMMENT

As for it helps me know that people do find my videos useful and so I will 100% continue my work.

Stay safe. God bless to you and all of you’re loved ones!

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