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  1. Venus

    Date de publication:

    6 Août 2003

    Of similar size and mass to Earth, Venus is sometimes considered its sister. The similarity stops there, however, and little is known about the evolutionary processes that created this peculiar planet.

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  2. Saturn

    Date de publication:

    6 Août 2003

    Long thought to be the only planet with a ring system, Saturn is a gas giant much like Jupiter:

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  3. Neptune

    Date de publication:

    6 Août 2003

    Neptune was the first planet to be discovered not through observation, but by predicting its existence using calculations based on the universal theory of gravitation.

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  4. Mercury

    Date de publication:

    6 Août 2003

    The closest planet to the Sun, Mercury is also the smallest of the telluric or Earth-like planets.

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