Question

III. Answer the following.
1.
What do you know about Universe?
2. Define solar system.
3. How did the Earth form?​

Answer 1

Answer:

1)The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

2)the collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.

3)When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.

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Answer 2

Answer:

1. The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

Mass (ordinary matter): At least 1053 kg

Main contents: Ordinary (baryonic) matter (4.9%); Dark matter (26.8%); Dark energy (68.3%)

Age (within Lambda-CDM model): 13.799 ± 0.021 billion years

Diameter: Unknown. Diameter of the observable

2. the collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.

3. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.