The Halley’s Comet regularly passes by the earth on its tour around the sun (at the time of Jesus’ birth it was something different, most probably). The semi- major axis of the elliptical path is 17.8 AU (astronomical unit = 150·109 m). Halley’s last visit at our earth was in 1985. Are you going to experience the next visit?

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The Halley’s Comet regularly passes by the earth on
its tour around the sun (at the time of Jesus’ birth it
was something different, most probably). The semi-
major axis of the elliptical path is 17.8 AU
(astronomical unit = 150·109 m). Halley’s last visit
at our earth was in 1985. Are you going to
experience the next visit?

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