Page 105 - Genius Kidz Prudence Learning Sc-8

2. Orion Constellation : Orion or Vyadha or
Mriga is in the form of a hunter. It is made up of
eight stars and can be easily seen on a winter

night so it is called as a master of winter sky.
Orion constellation helps us to locate Sirius
star as shown in the figure

88 astronomical constellation are known, 12 of
them are zodiac constellations.

! Space containing heavenly bodies constitutes the universe.
! Solar system comprises of sun and eight planets that move around the sun in their own specific
curved paths called orbits.

! Other members of the solar system comprise of asteroids, comets, meteors and meteorites.
! A celestial body that revolves around a planet in specific orbital path is called a satellite.
! Satellite can be natural or artificial.

! Constellation is the arrangement of a group of stars in some recognizable form.

EXERCISE
EXERCISE

1. Multiple choice questions.

(a) Planets are made up of :
(i) Compressed gases only (ii) Solid, liquid and gases
(iii) Hydrogen and helium (iv) None of these

(b) Rohini is an :
(i) Asteroid (ii) Comet (iii) Artificial Satellite (iv) Natural Satellite
(c) Gradual decrease in the size of bright disc of moon represents :

(i) Wanning of the moon (ii) Waring of the moon
(iii) New moon (iv) Full moon

(d) 1 lunar day is equal to :
(i) 29 days (ii) 28 days (iii) 27 days (iv) 26 days

2. Fill in the blanks.
(a) Moon is visible to us because of ______________ of sunlight.

(b) Meteor shower is ______________ .
(c) ______________ is an icy small solar system body.
(d) Meteors are also called as ______________ .

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