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Stars which appear single to the naked eye but are double when seen through a telescope are

  • A.Novas and supernovas
  • B.Binaries
  • C.Asteroids
  • D.Quasars

Answer: B

Such stars are binaries.

A binary is a pair of stars bound by gravity and orbiting their common centre of mass, too close together to be separated by the eye but resolved in a telescope. More than half the stars in the sky are thought to belong to multiple systems.

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