(d) 24 hours
Ans: (b)
390. The tiniest of the stars belong to the group known as
(a) Giant stars
(b) White Dwarf stars
(c) Neutron stars
(d) Super-giant stars
Ans: (c)
391. The star nearest to the sun is
(a) Proxima Centauri
(b) Sirius
(c) Aldebaran
(d) Vega
Ans: (a)
392. The stars that shine brightly then dimly and then brightly are known as
(a) meteors
(b) binaries
(c) variable stars
(d) bright stars
Ans: (c)
393. A pair of stars that revolve round each other is
(a) a neutron star
(b) a binary star
(c) a dwarf star
(d) a polar star
Ans: (b)
394. The colour of a star is an indication of its
(a) distance from the earth
(b) age
(c) temperature
(d) size
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