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Math Help - Gravitation - Find eccentricity of new orbit?

  1. #1
    Super Member fardeen_gen's Avatar
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    Gravitation - Find eccentricity of new orbit?

    A planet is in a circular orbit about a massive star. The star undergoes a spherically symmetric explosion in which one per cent of its mass is suddenly ejected to a distance well beyond that of the planet's orbit. Find the eccentricity of the new orbit of the planet assuming that the planet is unaffected by the explosion.

    Answer:
    Spoiler:
    e = 0.01


    Any ideas regarding how to do it?
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  2. #2
    Super Member Rebesques's Avatar
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    Conservation of angular momentum.
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