Phases of the 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.
Fill in the blank :(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 as a......................(d) A celestial body that revolves around a planet is known as......................(e) Shooting stars are actually not......................(f) Asteroids are found between the orbits of ..................... and.....................
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 our solar system.(d) INSAT is an artificial satellite.(e) There are nine planets in our solar system.(f) Constellation Orion can be seen only with the telescope.
Match items in Column A with one or more items of Column B :Column A Column 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
Why is the 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?
