Actually the earth is not a sphere, it is flattened at the poles and bulges at the Equator, the Earth is an oblate spheroid. And there are, as far as we know, not 9 planets in the solar system, there are 8,
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, though there may be a nineth very, very much further out which we cannot currently detect by any other means than mathematical calculations.
The fact that the bible does not specifically give us this information is indicative, I suggest, that God wants us to find out for ourselves. Something YECs don't seem very much interested in doing, judging from your knowledge of the number of planets in your own solar system and the shape of the earth you are living on.
As for your idea that the Bible 'tells us' things; it doesn't. We read things from it and interpret what we read. Much of what previous generations interpreted in the field of science, they interpreted wrongly. Some of it they got right. But flat earth and geocentric universe are but two major misconceptions which bible readers got seriously WRONG. Human nature being what it is though, there is still a 'Flat earth society' championing the cause of insisting the earth is FLAT, and there are still people who firmly believe, against all the factual evidence, that the earth is the centre of the universe.
C'est la vie.
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