Stars and The Solar System

Exercise 1

1.    Which of the following is NOT a member of the solar system?

(a) An asteroid

(b) A satellite

(c) A constellation

(d) A comet

2.    Which of the following is NOT a planet of the sun?

(a) Sirius

(b) Mercury

(c) Saturn

(d) Earth.

3.    Phases of moon occur because

(a) We can see only that part of the moon which reflects light towards us.

(b) Our distance from the moon keeps changing.

(c) The shadow of the Earth covers only a part of the moon’s surface.

(d) The thickness of the moon’s atmosphere is not  constant.

4.    Fill in the blanks.

(a) The planet which is farthest from the Sun is ____.

(b) The planet which appears reddish in colour is ____.

(c) A group of stars, that appear to form a pattern in the sky is known a ____.

(d) A celestial body that revolves around a planet in known as _____.

(e) Shooting stars are actually not ____.

(f) Asteroids are found between  the orbits of ______ and ______.


5.    Mark the following statements as true (T) or false (F).

(a) Pole star is a member of the solar system. ( )

(b) Mercury is the smallest planet of the solar system. ( )

(c) Uranus is the farthest planet in the solar system. ( )

(d) INSAT is the artificial satellite. ( )

(e) There are nine planets in the solar system. ( )

(f) Constellation Orion can be seen only with a telescope. ( )

6.    Match items in column A with one or more items in column B.

A                                                  B

(i) Inner planets                         (a) Saturn

(ii) Outer planets                        (b) Pole star

(iii) Constellation                       (c) Great Bear

(iv) Satellite of the Earth          (d) Moon

(e) Earth

(f) Orion

(g) Mars

7.    In which part of the sky can you find Venus if it is visible as an evening star?

8.    Name the largest planet of the solar system.

9.    What is a constellation? Name any two constellations.


10.  Draw sketches to show the relative positions of prominent stars in

(a) Ursa Major and     (b) Orion.

11.  Name two objects other than planets which are members of the solar system.

12.  Explain how you can locate the Pole Star with the help of Ursa Major.

13.  Do all the stars in the sky move? Explain.

14.  Why is distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the earth?

15.  The radius of Jupiter is 11 times the radius of Earth. Calculate the ratio of the volumes of Jupiter and the earth. How many earths can Jupiter accommodate?