How the sun and the planets formed?

Answer 1

AnswerNobody knows for certain. Most Scientists think that the Sun,Earth, and other planets (the solar system) were formed from a mass of dust and gas.Nearly 4.5 billion years ago, this mass started to shrink, and then spin and flatten into a disk.The center of the disk became the Sun.The rest of the material turned into the planets.

Answer 2

The formation of our solar system is thought to have begun 4.568 billion years ago with the collapse of a large molecular cloud, mainly hydrogen, which gradually came together under its own gravity. The whole system gradually spun as it collapsed, faster with time (conserving angular momentum) and more quickly at the centre (similar to water running down a drain).

Most of the matter collected at the middle, while the remainder formed the protoplanetary disc. The concentration of Hydrogen at the centre of the system caused immense pressures and temperatures to build up, until conditions were extreme enough to allow hydrogen nuclei to fuse together. This nuclear fusion marked the point at which the sun became a main sequence star. This nuclear fusion process provides a huge amount of energy - hydrogen nuclei mass is converted to energy through Einsteins E=mc2 equation. This is how the sun continues to burn to this day.

The planets were formed from the protoplanetary disc, the remaining material. These were formed slowly over time as the material collected together, with gaseous planets able to form further away from the sun and smaller rocky planets, including the Earth, forming closer to the sun.

Answer 3

The sun and planets formed from a solar nebula, a large cloud of gas and dust in space. Gravity caused the nebula to collapse, spinning faster and flattening into a disk shape. The sun formed at the center, while planets grew from material in the disk through accretion and gravitational attraction.