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Development of Our Solar System Timeline
Development of Our Solar System Timeline
Jaylynn Taylor
Our Solar System
The solar system formed about 4.5 billion years ago, from a dense cloud of interstellar gas and dust. The cloud broke down, which could have been from the shock wave of a near exploding star, a super nova. Which all formed a solar nebula, which is a swirling dish of material. The solar system formed from the gravitational collapse of a piece of a giant molecular cloud.
1. Where did it come from? What caused it to gather together.
Our Solar System Material
The Formation of the Acceleration Disc
Scientists believe that our solar system was a disc because the rule “conservation of angular momentum”, which is the total amount of spinning in any closed of system, like the solar system, will always remain constant. Scientists believe the cloud was allowed to flatten over time, losing height and becoming two-dimensional as it spun.
The Formation of the Accretion
2. Why do scientists believe it was a disc? What caused the disc to form?
Ignition of Our Sun
Differentiation into Bands of Material
Ignition of Our Sun
4. How long did this take? Why do we think this happened?
3. What caused the sun’s nuclear furnace to ignite?
The nuclear fusion takes up about 60 percent of the radius of the Sun. It takes about a million years for energy to get through the nuclear fusion, to reach the convective layer, because the photons are constantly intercepted, absorbed, and re- emitted.
Before the Sun was the big fuming star that we know today, it was a cool object that was heating up due to gravitational compression fusion. About 4.6 billion years ago, the sun was formed from a gravitational collapse of a vast cloud of gas and dust. Material in the center of the cloud was squeezed so tightly, that it became hot enough to ignite the nuclear fusion. The hydrogen fusion reaction began producing energy, and the sun was said to have expanded.
Planet Formation
Planets were thought to have formed from the solar nebula, the disc shaped cloud of gas and dust that was left over the Suns formation. Planets began as dust grains in orbit around the central protostar. Over the years, Jupiter migrated inward and Saturn, Uranus, and Neptune migrated outward. The internal planets are terrestrial, because they have a compact, rocky surface and can withstand the heat of the Sun. The outer planets are gas, because the outer regions of the solar system are cooler and elements like water and methane did not vaporize and were able to form the gaseous giant planets.
Planet Formation
5. Did the early planets look like they do today? Why are the internal planets terrestrial? Why are the outer planets gas?
Solar System
It has taken our solar system about 4.5 billion years to form and look how it does now. Our solar system has been developing for 4.5 billion years and is still in the midst of developing and changing. It is denoted S 0.
Solar System Formation
6. How long did it take for the solar system to look like it does now? Is it a constant, or is it still in flux?