1. Answer the following questions briefly. (a) How does a planet differ from a star? (b) What is meant by the 'Solar System"? (c) Name all the planets according to their dist (d) Why is the Earth called a unique planet? (e) Why do we see only one side of the moon al (1) What is the Universe ?
Answers
Answer:
1. Star is a celestial object that emits its own light due to a chemical reaction at its core. ... A planet is a celestial body that orbits around the star in its solar system and gets its glow from the suns light reflecting from the planets face.
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. (In order of distance from the sun) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
4. Earth is the only known planet of the solar system which supports life. Earth has oxygen, water and temperature. ... All these conditions which are supporting life, like presence of water and air in a good proportion, presence of life supporting gas and balanced temperature make earth a unique planet.
5. The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us. Known as “synchronous rotation,” this is why we only ever see the Moon's nearside from Earth.
6. The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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