Answers

2015-08-09T12:45:16+05:30
  Halley's comet is a short period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is clearly visible to us with a naked eye.Its periodicity was first discovered or founded by Edmond Halley.
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2015-08-09T12:54:22+05:30
It will appear after 75-76 years from earth
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