what is the solar system?

Answer 1

Here is a brief outline of the current theory of the events in the early history of the solar system:

A cloud of interstellar gas and/or dust (the "solar nebula") is disturbed and collapses under its own gravity. The disturbance could be, for example, the shock wave from a nearby supernova.

As the cloud collapses, it heats up and compresses in the center. It heats enough for the dust to vaporize. The initial collapse is supposed to take less than 100,000 years.

The center compresses enough to become a protostar and the rest of the gas orbits/flows around it. Most of that gas flows inward and adds to the mass of the forming star, but the gas is rotating. The centrifugal force from that prevents some of the gas from reaching the forming star. Instead, it forms an "accretion disk" around the star. The disk radiates away its energy and cools off.

First brake point. Depending on the details, the gas orbiting star/protostar may be unstable and start to compress under its own gravity. That produces a double star. If it doesn't ...

The gas cools off enough for the metal, rock and (far enough from the forming star) ice to condense out into tiny particles. (i.e. some of the gas turns back into dust). The metals condense almost as soon as the accretion disk forms (4.55-4.56 billion years ago according to isotope measurements of certain meteors); the rock condenses a bit later (between 4.4 and 4.55 billion years ago).

The dust particles collide with each other and form into larger particles. This goes on until the particles get to the size of boulders or small asteroids.

Run away growth. Once the larger of these particles get big enough to have a nontrivial gravity, their growth accelerates. Their gravity (even if it's very small) gives them an edge over smaller particles; it pulls in more, smaller particles, and very quickly, the large objects have accumulated all of the solid matter close to their own orbit. How big they get depends on their distance from the star and the density and composition of the protoplanetary nebula. In the solar system, the theories say that this is large asteroid to lunar size in the inner solar system, and one to fifteen times the Earth's size in the outer solar system. There would have been a big jump in size somewhere between the current orbits of Mars and Jupiter: the energy from the Sun would have kept ice a vapor at closer distances, so the solid, accretable matter would become much more common beyond a critical distance from the Sun. The accretion of these "planetesimals" is believed to take a few hundred thousand to about twenty million years, with the outermost taking the longest to form.

Two things and the second brake point. How big were those protoplanets and how quickly did they form? At about this time, about 1 million years after the nebula cooled, the star would generate a very strong solar wind, which would sweep away all of the gas left in the protoplanetary nebula. If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant. If not, it would remain a rocky or icy body.

At this point, the solar system is composed only of solid, protoplanetary bodies and gas giants. The "planetesimals" would slowly collide with each other and become more massive.

Eventually, after ten to a hundred million years, you end up with ten or so planets, in stable orbits, and that's a solar system. These planets and their surfaces may be heavily modified by the last, big collision they experience (e.g. the largely metal composition of Mercury or the Moon).

Answer 2

The Solar System Is The Sun, And All The Bodies Which Circle It In Space.

We Live On One Of The Nine Planets That Revolve Around The Sun. Between Te Orbits Of Mars And Jupiter Are Many Small Planets Called Asteroids. Millions Of Meteroids-Fro Nearly 800 Kilometres In Diameter To Small Rock And Dust Particles- Are Also Circling Around The sun.

To Get An Idea Of The Sizes Of Plnets, We Can Think Of Mercury As A Small Seed, Venus, An Orange Pip, Jupiter An Orange, Uranus And Neptune Large Cherries, And Pluto As A Small Seed.

The Sun Would Be A Ball 600 Millimetres Across, And The Earth 65 Metres From The Sun.

Answer 3

It is the sun, and all of the planets (including all the moons and asteroids) that revolve around the sun.

In our solar system there are at least 9 planets. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.

They were all created in the original creation week (when God created the Heavens and the earth in 6 days) about 6000 years ago.

Answer 4

The Solar System is the planets that are orbiting the Sun. Our solar system is only one system in the Milky Way and the Milky Way is only one Galaxy in the universe.

Answer 5

Hi,
solar system is including some thing like star that in our solar system call it sun
planets like earth or mars and some small rock between planet that all planets and rocks have adjust orbit around the star ( sun)..

Answer 6

the solar system is the sun, the planets which orbit the sun and the space in which they exist. The edges of the solar system can be defined by the range of influence of the sun's gravitational pull.

Answer 7

Sol (our Sun) and its complete system or family. There are 9 known planets, and most of them have moons. There are also smaller bodies called asteroids, mostly in a ring between Mars and Jupiter. There are comets on the outer edges of the system. Halley's Comet appears once every 76 years, for example. There are probably smaller things, but I've listed the major ones.

Answer 8

sun and the planets make a solar system

Answer 9

the planets that revolve around our sun.
A solar system are planets that revolve around a sun.

Answer 10

the planets that revolve around our sun.
A solar system are planets that revolve around sun