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(i) c

(ii) e

(iii) a

(iv) b

(v) d

All the stars, meteors, planets, satellites, comets, including our earth, the sun and the moon, which remain scattered in the sky are called the celestial bodies. Stars are formed by the collision of helium and hydrogen atoms. Stars are gaseous in form. But, all the celestial bodies are not gaseous. Some bodies are made of solid substances, while some bodies are made of solid, liquid and gaseous substances.

1. firm 

2. myth 

3. Dhruv Tara 

4. universe.

Hailey’s comet is the most popular tail star. It appears after a long interval of 76 years. It was last seen in the year 1986. Now it will be again seen in the year 2062.

In fact, Milky Way is a group of stars. This group is illuminative. Due to this condition, it was presumed in ancient India, that it is the river of light which flows in the sky. For this very reason, it was named as the Milky Way.

(c) after every 76 years

(d) the milky way

Big bang theory is the most accepted theory of evolution of the universe. According to this theory, the universe evolved due to the explosion which took place around 13.7 billion years ago. Various celestial bodies were produced by the substances which were emitted by the explosion. Due to the deposit of these substances around the bodies, they increased in size and several galaxies were formed, due to which, the universe started expanding. Since the time of its formation, the universe is continuously expanding.

Answer is: (b) planet

Different stars and their remnants, gases between them and deposition of dust particles between them are tied together due to the gravitational force in space and they are called galaxies. These galaxies flourish in length and breadth in many lacks of light years.

During the night, many stars can be seen twinkling in the sky, but they disappear during the day, because the Sun is a star situated near the Earth, while the other stars are far away from the Earth. Due to this, the light of the sun is more intense while the light of other stars is negligible, and therefore, due to the effect of their light being very less during the presence of the sun, stars are not seen during daytime.

By observing the stars after sunset, it is found that’the position of Saptarishi Mandal in the sky is towards the northern direction.

1. Conversational stories heard from the elder members of our family tell that earlier there was a prince called Dhruv, who was removed by his father from his lap, as he was told to do so by his second wife. Due to this, Dhruv became sad and went into the jungle and started praying to God to let him sit in his lap. Finally, he was blessed by Go that he would attain the highest place. Due to the same reason, Dhruv is still visible to us in the form of Pole star (Dhruv Tara). 

2. The elders of the family say that the stars which are present in the sky are our elders who are visible in the form of stars after their death. 

3. The elders of the family interpret the moon as ‘Chandamama’.