Related Questions

Pole Star is always seen at one point in the sky whereas other stars are not; this is because ________
A Pole star rotates with the same period as the earth
B Pole star is a star of our own galaxy
C Sun and Pole star are in two opposite directions relative to earth
D Pole star lies in the axis of spin of the earth
Which planet is known as the "Morning Sea" and the "Evening Star" because of its visibility in the sky ? 
A Venus
B Mars
C San
D Jupiter
The theory behind stars twinkling is that
A The refractive index of the different layers of earth's atmosphere changes continuously, consequently the position of the star's image changes with time
B The intensity of light emitted by them changes with time
C The light from the star is scattered by the dust particles and air molecules in the earth's atmosphere
D The distance of the stars from the earth changes with time
What is the reason for twinkling of stars ?
A Dispersion of light
B Total internal reflection
C Atmospheric reflection
D Atmospheric refraction
Twinkling of stars is due to
A large distance of stars and storms in air
B rotation of earth
C large size of stars
D large distance of stars and fluctuations in the density of air
Which is the brightest star in our night sky?
A Canopus
B Sirius A
C Vega
D Spica
The brightest star in the sky is ________
A Alfa Centauri
B Proxima Centauri
C Sirius
D Sun
To a space traveller on moon, the lunar sky during day time appears ________
A White
B Blue
C Black
D Red
The patriot is the star of the country. Here the 'star' is used as a/an-
A smile
B metaphor
C allegory
D personification
A hat contains 12 cards marked with a star and 18 unmarked cards. What is the probability that one card slelected at random will be marked with a star?
A 3/5
B 2/5
C 2/3
D 5/2

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