i. The North Star indicates the north direction.
ii. The sun is in the centre of the solar system.
iii. We can see the full moon only once in about a month’s time.
iv. Full moon night is also known as Poornima.
v. Ursa Major or Big Bear is a constellation.
vi. Aryabhatta was a famous astronomer of ancient India.
i. All the planets move around the sun in an elongated path. True
ii. It is huge and made up of extremely hot liquids. False
iii. The word ‘planet’ comes from the Greek word “Planetai” which means ‘wanderers’. True
iv. The moon is in the centre of the solar system. False
v. Till recently (August 2006), Pluto was also considered a planet. True
vi. Word geography is made of two Greek words, ‘ge’ meaning’ ‘earth’ and ‘graphia’ meaning ‘writing’. True
Ans. A fortnight
Ans. Pluto, Ceres, 2003 and UB313
Ans. Earth is the third nearest planet to the sun.
Ans. The moon is the closest celestial body to our earth.
Ans. Moon is the natural satellite of the earth.
Ans. They are found between the orbits of Mars and Jupiter.
Ans. We can see the full moon only once in about a month’s time.
Ans. The moon moves around the earth in about 27 days.
Ans. A sphere with its ends flattened at poles (just like earth) is called geoid.
Ans. The stars look so small in the sky because they are very far from us.
Ans. Earth gets all its heat and light from the sun, which is its nearest star.
Ans. Light travels at the speed of about 300,000 km per second.
Ans. The light of the sun takes about eight minutes to reach the earth.
Ans. Those who study the celestial bodies and their movements are called astronomers.
Ans. It has mountains, plains and depressions on its surface. These cast shadows on the moon’s surface.
Ans. The North Star indicates the north direction. It is also called the Pole Star.
Ans. A galaxy is a huge system of billions of stars, and clouds of dust and gases.
Ans. We can locate the position of the Pole Star with the help of the Saptarishi.
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