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Understanding the Protoplanet theory

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Grace Gaugler

on 11 March 2013

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Transcript of Understanding the Protoplanet theory

Understanding the Protoplanet Theory For years, astronomers have studied the sky in search for evidence that would give them an explanation as to how solar systems came to be. With every mind, came a different theory; though only a few have succeeded in making an impact in the scientific world. theory are still sparking controversial discussions today among astronomers. The Nebula Theory suggests it all begins with a slowly rotating cloud of dust and gas that then contracts due to gravitational forces. Because of the need to conserve angular momentum, the cloud shrinks, and rotates even faster (just like an ice skater spinning on one skate and pulling in her or his arms). This increased velocity caused the cloud to bulge in the middle. At the end the central portion, where most of the mass ends up, becomes the sun, with the planets forming from the material in the bulge. The two most substantial theories, the nebular theory and the Protoplanet Where as the Protoplanet theory, although it has the same basic premises, there are just a few adjustments in hopes to fill in the holes that the Nebula theory didn't quite answer.
According to this theory, planets are formed from solar systems & nebulas that have collapsed, leaving behind dust and other particles which will eventually collide to form planetesimals. These are recognized as small celestial bodies which make up protoplanets. They are a result from instabilities in a protoplanetary disk, the gas and dust clump together alongside the sun. Once this is done, all that's left in the process is for the protoplanets to start collecting debris by using their mass' gravitational pull. What's left behind is blown away by solar winds. The protoplanet theory leaves us with many unanswered questions, but it made a great contribution to straying scientists away from the Nebula Theory and open up to one that contain more abstract concepts. E.g Tidal Theory Digging a Little Deeper Bibliography: Stratis Kakadelis, Frank Summers, Tracey Vogel (2012) Discovering Planets Beyond. http://hubblesite.org/hubble_discoveries/discovering_planets_beyond/how-do-planets-form
Alan P. Boss(2013) Evolution of the Solar Nebula. V. Disk Instabilities with Varied Thermodynamics. http://iopscience.iop.org/0004-637X/576/1/462
Tega Jessa(2011, 18 April)Protoplanet Hypothesis. http://www.universetoday.com/85761/protoplanet-hypothesis/
George garze(2011, 2 June) Formation and Exampls of Protoplanets. http://www.brighthub.com/science/space/articles/110356.aspx The theory states that solar systems begin by forming out of the collapsing of either a cloud or nebula, from here gravity play its role by pulling material from the cloud closer together to create a hot, dense core. From then on, this body is considered a protostar because as it is fusing hydrogen, it is simultaneously growing and eventually it will become a main sequence star. H2 He After the sun has reached a state in which it is dense and hot enough to "turn on", the instabilities in the protoplanetary disk will create self-gravitating clumps called planetesimals- the particles that make up a protoplanet. Lastly, with the help of gravity these protoplanets will capture materials within their atmosphere. Contributing the mass and later on becoming full planets. Leftover dust and other particles are blown away by solar winds. Unknown(Updated last: Unknown) Nebula Theory. Hand out from class. Recieved 2013 March.
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