Question

Compare the size of Earth with that of the Sun, the solar system, and a galaxy.

Answer 1

Answer:

Galaxy > The solar system > The sun > The earth

Explanation:

A galaxy is usually defined as a large accumulation of interstellar dust and gas particles, and also includes many solar systems, the sun, the planets, and other rocky planets. The name of the galaxy comprising the earth and the sun is the Milky way galaxy. The milky way galaxy has a diameter ranging between 150,000 and 200,000 light-years.

The solar system is composed of the nine planets including the asteroid belt, that goes around the sun in different orbits. The size of the Solar System is about 287.46 billion km in terms of diameter.

The sun is located at the central portion of the solar system that is the main source of energy. Its size is roughly 695,510 km in terms of diameter.

The earth is the only planet where life exists and is the 3rd planet that is closer to the sun, having a diameter of approximately 12,742 km.

Answer 2

Answer:

Explanation:

• Sun is about 109 times the diameter of the earth. It means that the radius of the sun is about:

$R_s=109\times 64000$

$R_s=6976000\ km$

• Earth is about the size of an average sun-spot.

• Our solar system is about 36 billions times huge than the size of the earth. The total mass of the solar system is about 333,345.997 times the mass of the Earth.
• Earth contributes only about 0.2 % of the total mass of all the planets of our solar system.

Our galaxy is milky way and our solar system orbits around the galactic center at a radial distance of about 28000 light-years.

The time period of this revolution is approximately 250 million years.

According to a scientific data there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of sun-like stars and red dwarf stars within the Milky Way Galaxy.