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New Science & Space Documentary | Secrets of the infinite Universe Planet | Science Documentary 2017

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Astronomers discover a missing link in planet formation ‘dust traps’

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But astronomers have struggled to assemble a complete theory of their origin that explains how the initial dust develops into planetary systems. A French-UK-Australian team now think they have the answer, with their simulations showing the formation of ‘dust traps’ where pebble-sized fragments collect and stick together, to grow into the building blocks of planets. Our Solar system, and other planetary systems, began life with disks of gas and dust grains around a young star. The processes that convert these tiny grains, each a few millionths of a metre (a micron) across, into aggregates a few centimetres in size, and the mechanism for making kilometre-sized ‘planetesimals’ into planetary cores, are both well understood. The intermediate stage, taking pebbles and joining them together into objects the size of asteroids, is less clear, but with more than 3,500 planets already found around other stars, the whole process must be ubiquitous. Dr Jean-Francois Gonzalez, of the Centre de Recherche Astrophysique de Lyon, in France, led the new work. He comments: “Until now we have struggled to explain how pebbles can come together to form planets, and yet we’ve now discovered huge numbers of planets in orbit around other stars. That set us thinking about how to solve this mystery.” There are two main barriers that need to be overcome for pebbles to become planetesimals. Firstly the drag of gas on dust grains in a disk makes them drift rapidly towards the central star, where they are destroyed, leaving no material to form planets.

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New Planet

Finding a New Earth: Exoplanets and the Habitable Zone

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May 11, 2016 Dr. Stephen Kane (San Francisco State University) Over 1500 new planetary systems have been discovered, many of which include planets quite different from those in our own Solar.

NASA held a news conference Feb. 22 at the agency’s headquarters to discuss the finding by the Spitzer Space Telescope of seven Earth-sized planets around a tiny, nearby, ultra-cool dwarf.

NASA said its Kepler spacecraft has spotted Earth’s bigger, older cousin: the first nearly Earth-size planet to be found in a habitable zone.

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New Planet

****RED PLANET and NEMESIS****(NIBIRU SYSTEM PLANETS’S SUN)

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Red Planet and Nemesis
Fort Lauderdale-Florida-USA 11.1.2018
This Footage thanx Linda..
PHOTOS LINK:

FACTS.tr.gg

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