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Up Next in Floating in Space

  • Mercury

    Visit Mercury, the smallest and innermost planet in the Solar System. Its orbit around the Sun takes 87.97 days, the shortest of all the planets in the Solar System. Named after the Roman deity Mercury, the messenger of the gods, Mercury has 'mercurial' temperature swings from extreme heat to ex...

  • Venus

    Visit the second planet from the Sun, and our celestial neighbor. Venus is a world of extremes, where scorching heat and a toxic atmosphere reign supreme. The planet spins so slowly that a Venusian day is longer than a Venusian year. Its surface, adorned with thousands of volcanic peaks, is an in...

  • Earth

    Home! Earth, the 3d planet from the Sun, formed 4.5 bya and weighs 6.58 billion trillion tons. Earth is not a perfect sphere, but an oblate spheroid, “squashed” a little at the North and South poles. The equatorial diameter is about 7,926 miles, but the polar diameter is 7,899.86 miles. Earth’s s...