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Halley's Comet has an extremely elliptical orbit around the Sun, with an eccentricity of 0.967. Its average orbital radius is 17.8 AU, and it was last observed in 1986. Use Kepler’s Third Law to calculate when Halley's Comet will appear next. (Note: The answer you obtain is based on averaged data and is an approximation.)

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soyboy5000
Use Kepler’s Third Law to calculate when Halley's Comet will appear next.

2061

Halley's Comet will appear next in 2061.

The following information can be depicted from the question:

  • Eccentricity = 0.967
  • Average orbital radius = 17.8 AU
  • The year that the elliptical orbit was last observed = 1986

In order to solve the question, we have to cube the distance first. This will be: = 17.8³ = 5639.752

Then, we have to find the square root of 5639.752 and this will be:

= ✓5639.752 = 75

Then we'll add 25 to the last year that the orbit was observed. This will be:

= 1986 + 25

= 2061

Therefore, Halley's Comet will appear next in 2061.

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