6.9 Read and translate the dialogue. Reproduce it

A.: Did the sun and the planets form at the same time?

B.: You see, there exist several concepts of the origin of the solar system. Some of them suggest that the sun and the planets originated at the same time from a tremendous cloud of gas, mostly hydrogen and cosmic dust.

A.: And what do other hypotheses suggest?

B.: Other hypotheses suggest that the planets are younger than the sun, that first the center of the cloud condensed and became a star – the sun, and then various densities gave birth to the planets.

A.: I see.

B.: But it must be said that there is still no generally accepted theory to explain how and when the sun and the planets formed.

6.10 Using the given chart , answer the following questions

1. Which planets have a longer day than year?

2. Which planet has the most moons?

3. Which is the hottest planet?

4. Which planet has the shortest day and the longest year?

5. Which planet has the closest length of a day to the Earth?

6. Which is the smallest planet?

7. If an Astronomical Unit is the distance from the Earth to the Sun, how many astronomical units away is Pluto?

Table 1

Name	Moons	Average Temp.C	Rotation	Orbit	Av. distance from Sun (million miles)	Diameter (miles)
Mercury	0	-167to427	58.6 days	87.97 days	36.04	3031
Venus	0	427	243.2 days	224.70 days	67.11	7521
Earth	1	-51 to 48	23.9 hrs	365.26 days	92.99	7926
Mars	2	-123to-30	24.6 hrs	686.98 days	141.61	4217
Jupiter	16	-117	9.8 hrs	11.86 years	483.66	88734
Saturn	18	-180	10.7 hrs	29.46 years	886.72	74566
Uranus	15	-221	17.2 hrs	84.01 years	1783.38	31566
Neptune	3	-216	16.0 hrs	164.79 years	2794.38	30758
Pluto	1	-230	6.3 days	247.69 years	3666.19	1429