The Solar System

B (gravity)

universe, molecular cloud, galaxy, star, planet, asteroid,atom

I assume you mean "planet". That would be Venus.

we have sent people to moon

non-examples of solar system iz galaxies,stars,and light-year

Those objects are far away, so not much information is known about them.

iceberg

* Like a planet, it orbits the Sun.

* Like a planet, it is large enough to be in hydrostatic equilibrium (which basically means it has a round shape)* Unlike a planet, has NOT cleared its surroundings. That means it is NOT the dominant object in the surroundings of its orbit.

the core

a) Why do we say that the requirements model represents a snapshot of a system in time?

The mass of the Sun is about 2 x 10 to the power 30 kilograms.

Mercury is the smallest of the 8 official planets in our Solar System.

In the traditional diagram of the Solar System Uranus is before Neptune. In reality, the planets are not in a line but at different points around the Sun as they orbit it, so it is the path of Uranus's orbit that lies before Neptune.

I assume you mean, why do they exert gravitational attraction. ANY object with mass, so any object, exerts such a force on ANY other mass.

There are lots of different types of rocks that form the planets.

If you use the definition of "density" as mass/volume, then yes. That's the standard definition.However, it is also possible to define density as weight/volume.

The heliocentric model is the one that replaces the geocentric model because the heliocentric model better described the solar system.

The star plays some important roles, it's unique gravitational signature defines/specifies objects which makes up its orbital richness.

It provides majority of fundamental energies (electromagnetism radiation, thermal, kinetic and gravity).

It dominantly influences the dynamic transform and transfer of energy of the solar system, complex and diverse process.

big chunks of dirt or ice with tails

There's a flaw in the premise here: hundreds of other systems have been detected. However, the information available about just one (our own) is sufficient to speculate on genesis.

One that we know of; our own. We had hoped to find some traces of life on Mars, but if there ever was any, it probably all died a billion years ago when Mars lost its supposed atmosphere. (These are guesses, of course.) It's unlikely that there is any life on any of the other planets in our solar system.

Moons, you say? It's remotely possible that some kind of life may exist in the oceans that we suspect may exist beneath the icy frozen surface of Jupiter's moon Europa, or even more remotely, on Saturn's moon Titan. (Did you hear all those "weasel words" like "might", "perhaps", and "may"? All guesswork at this point.)

Given that we've discovered a difficult-to-believe number of planets orbiting other stars, and that there are probably a TRILLION stars in our solar system, there may be anywhere from a billion to several trillion planets in the Milky Way. It would be tough to believe that NONE of them host any kind of life.

A "fare" is that which you pay to make a journey on Earth which is in the Solar System.

About 93 million miles.

The heliocentric theory was first published by Copernicus.