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The Nebula Theory
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Evidence & Flaws
Flaws
Evidence
- In order to create a protoplanetary disk, the sun had to have spun 700 times faster. But considering the sun's surface speed, this should cause it to fall apart.
- The planets should have axis of rotation parallel to the sun and should rotate prograde, they do not.
- Similar solar systems beyond our own are being formed through the same process.
- Stray debris and matter had not collapsed into the sun and instead collided and created planets.
- Mostly all the planets orbit in the same direction around the sun in a disk formation supporting the theory that planets are only by-products of the sun's formation.
Gravity and Fusion's Effects on Planetary Formation
Gravity
Fusion
- Fusion assisted gravity in creating our sun.
- Without fusion the opposing force to gravity, our solar system would collapse starting with our sun.
- Fusion helps keep the planetary disk intact.
- Gravity is the leading role in the creation of our solar system.
- Caused the nebulae to spin and collapsed.
- Produced the dense center of our solar system, the sun.
- Created the orbiting disk around the sun that developed planets.
Solar System & Planetary Formation
The Nebular Theory
Introduction:
There are many theories as to how our solar system was formed, however the "Nebular Theory" is the most widely accepted one.
Hypothesis:
I theorize that the Nebula Theory is the theory that a collection of miscellaneous matter and gas collapsed into a small, dense, ball of matter to then create the sun. The remaining matter began to collect and orbit the sun creating the planets.
By: Logan Hahn
What is It?
According to the "Nebular Theory", 4.568 billion years ago our solar system was only a giant molecular gas cloud, (nebulae), consisting of mostly hydrogen. The center of the cloud experienced a gravitational collapse which traumatically created our sun. This collapse was caused by the spinning of the nebulae that compressed the gas and then collapsed according to conservation of angular momentum. The remaining mass flattened out into a protoplanetary disk. Which orbited long enough to develop and create the eight planets and their moons. The matter that wasn't large enough to become a planet became part of the asteroid belt.
What is it?
Bibliography
- "Nebular Theory." Universe Today RSS. N.p., n.d. Web. 16 Mar. 2014. <http://www.universetoday.com/77525/nebular-theory/>.
- "The Origin of the Solar System." The Origin of the Solar System. N.p., n.d. Web. 14 Mar. 2014. <http://csep10.phys.utk.edu/astr161/lect/solarsys/nebular.html>.
- "The solar nebula theory has many problems." Examiner.com. N.p., n.d. Web. 15 Mar. 2014. <http://www.examiner.com/article/the-solar-nebula-theory-has-many-problems>.
- "What is the evidence supporting the nebula theory of Solar System formation?." Curious About Astronomy:. N.p., n.d. Web. 16 Mar. 2014. <http://curious.astro.cornell.edu/question.php?number=600>.