How did all the planets get there?

Answer 1

How all the planets got here is simple. At the beginning of the solar system 4.8 billion years ago there was 21 planets. But there was nothing in the

solar system yet but the sun and asteroids the size of mars or bigger. These asteroids crashed and smashed into each other making them explode and get really hot. The heat was like glue sticking all the asteroids together. Then a long time ago 3 billion years ago the planets were made, but this time the 21 planets turned into 17 planets. 3 billion years ago the planet Thea crashed into earth but earth survived the impact while Thea exploded to make our moon. To make the moon the same had to be done to it like the planets had to get done.

So that's how all the planets got there by asteroids and destruction.

Answer 2

Planets in a solar system (our included) form from the same disk of matter that forms the central star (called a sun). Such a disk forms from a nebula, the remnants of a stellar explosion. As the disk collapses in on itself, becoming denser and warmer, and rotating faster, the components separate into distinct rings according to mass. The center of the disk forms a roughly spherical object called a protostar. As time progresses, the protostar becomes a distinctly spherical star, and the halo of dust and gasses around it separates into individual rings. Heated by the chaos of the gravitational forces in the formation of the disk, the dust accretes to form rocks, which accrete to form larger rocks, and so on, eventually forming hot, asteroid-like objects called planetesimals. As they orbit, these planetesimals collide, eventually forming larger objects called protoplanets. Upon reaching sufficient mass to reach hydrostatic equilibrium (become round by gravity), to clear the surrounding space, and to settle into stable orbits, these protoplanets became planets. In the inner part of a solar system, planets that form are typically rocky, with high iron content, as well as the highly important compound water. These planets are called terrestrial. Outer planets tend to form with large amounts of gases, namely hydrogen and helium. The resulting planets consist of a small, heavy core surrounded by a huge volume of elements that would usually occur as gasses. These planets are called Jovian. In our own solar system, terrestrial and Jovian planets are separated by an asteroid belt (called the Main Belt, one of three groups of asteroids orbiting our sun). Because they all form from the same disk, planets in a solar system almost always orbit in the same direction, which happens to be the direction of the sun's rotation.

Another way by which planets may end up in a solar system is by capture, in which the gravitational forces of a star pull a rogue planet or other object into a stable orbit around said star. This is not thought to have occurred with any of the planets in our solar system, though some comets may have been captured. Captured objects typically have drastically different orbits from the 'norm' in the system. While other objects may all orbit clockwise and in the same plane, a captured object may orbit counterclockwise and perpendicular to the common orbital plane.

Planets may also end up in a solar system when two systems collide, the suns combining to form one massive star (assuming they do not explode upon impact). In such a case, most planets will be either flung into deep space or consumed. Those that remain will have irregular orbits.

Answer 3

Planets formed from a disk of gas and dust surrounding the young Sun about 4.5 billion years ago. As particles collided, they stuck together, forming planetesimals which eventually accreted into planets. This process, known as accretion, gave rise to the planets in our solar system.

Answer 4

that depends on ur belief, there is the big bang theory if ur an atheist, but if ur not, u should believe in that religion.