Related Questions

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
Stars which appear single to the naked eye but are double stars when observed by a telescope, are known as ________
A Cosmic stars
B Quasars
C Binaries
D Novae and supernovae
The Hubble Space Telescope will search for planets around other stars, a key to the . . . . . . . . for extra terrestrial life, and examine interstellar dust and gases out of which stars are born.
A discovery
B perception
C quest
D enquiry
The Hubble Space Telescope will search for planets around the stars, a key to the ...... extraterrestrial life, and examine interstellar dust and gases out of which stars are born.
A perception
B discovery
C enquiry
D quest
A star appears twinkling in the sky because of
A Scattering of light by atmosphere
B Reflection of light by atmosphere
C Refraction of light by atmosphere
D Diffraction of light by atmosphere
The different colours of different stars are due to the variation of
A Temperature
B Pressure
C Density
D Radiation from them
A person travels I2 km due north, then 15 km due east after that I5km due west and then 18 km due south. How far B she from the starting point?
A 6km
B 10km
C 33km
D 60km
Neither the moon nor the stars --- visible last night. The verb to fill in the gap should be ---
A was
B were
C are
D had been
Astronomy : Stars :: Biology :
A Oceans
B Plants
C Planets
D Earth

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