Welcome to the Chapter 17 - Stars and The Solar System, Class 8 Science NCERT Solutions page. Here, we provide detailed question answers for Chapter 17 - Stars and The Solar System. The page is designed to help students gain a thorough understanding of the concepts related to natural resources, their classification, and sustainable development.
Our solutions explain each answer in a simple and comprehensive way, making it easier for students to grasp key topics Stars and The Solar System and excel in their exams. By going through these Stars and The Solar System question answers, you can strengthen your foundation and improve your performance in Class 8 Science. Whether you’re revising or preparing for tests, this chapter-wise guide will serve as an invaluable resource.
(c) A constellation
A constellation is not a member of the solar system. Group of stars with a recognizable pattern in the sky are called as constellation.
(a) In Ursa major, for stars are present in the bowl and the three stars in the handle. It appears like a big dipper.
(b) Orion: It appears like a hunter. In this, five stars are arranged in a form of quadrilateral and three stars appears in the belt.
Asteroids and meteors are the two objects other than planets which are the member of the solar system.
Look at the two stars at the end of the Ursa Major. Imagine a straight line passing through these stars. Extend this imaginary line towards the north direction. At the point where the imaginary line meets to a star is called the pole star.
No, all the stars in the sky do not move. They only appear to move. This is because earth moves from west to east. Like when we travel in the train, the nearby trees and building appears to move in the backward direction.
Stars at a distance of millions of kilometers from the earth. Thus, there large distance are expressed in the light year. One light year is the distance travelled in one year.
One light year = 9.46 x 1012 km.
If a star is located eight years away from the earth that means the distance between the star and the earth is equal to the distance which is travelled by light in eight years. So, the distance between the star and the earth us given by:
8 x (9.46 x 1012) km = 7.6 x 1012 km.
Position of Mars, Venus, Uranus and Neptune should be interchanged. The correct position of the planets are as follows:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
(a) Sirius
Sirius is a planet of the sun. It is not a star.
(a) We can see only that part of the moon which reflects light towards us.
Moon does not have its own light. When sunlight falling of then it gets reflected towards us. So, only that part of the moon appear to us which reflects the light of sun towards us.
(a) Neptune
Neptune is present far away from the sun.
(b) Mars
Because on Mars, a lot of rocks and iron parts are present, when they come in contact of air, they get oxidized and turn into reddish colour.
(c) Constellation
Constellation is a group of stars with a recognizable pattern in the sky.
(d) Satellite
Satellite gives scientific information about the planet and it is a source of communication also.
(e) Stars
They are actually not stars, they are meteors.
(f) Mars, Jupiter
Asteroids occupy a large gap between the orbits of Mars and Jupiter.
(a) False
This statement is false because stars are not the member of the solar system.
(b) True
This statement is true because the smallest planet of the solar system is Mercury.
(c) False
This statement is false because Neptune is the farthest planet of the solar system.
(d) True
Yes, it is an artificial satellite. It is man- made satellite. Hence, this statement is true.
(e) False
This statement is false because there are eight planets in our solar system.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
(f) False
This statement is false because constellation Orion is large enough to see with naked eyes.
A B
(i) Inner planets (a) Saturn
(ii) Outer planets (b) Pole star
(iii) Constellation (c) Great Bear, (f) Orion
(iv) Satellite of the Earth (d) Moon
Venus become visible after sunset that is why it is called evening star. It appears in the west direction.
Jupiter is the largest planet of the solar system.
Constellation: The stars forming a group that has a recognizable shape or pattern in the sky is called constellation. For example: Great bear (Ursa Major), Orion etc.
