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I've always liked Saturn. But I also have some sympathy for Pluto because I heard it's been downgraded from a planet, and I think it should remain a planet. Once you've given something planetary status it's kind of mean to take it away.

Saturn seems to have impressed the seal of melancholy on me from the beginning.

We must believe then, that as from hence we see Saturn and Jupiter; if we were in either of the Two, we should discover a great many Worlds which we perceive not; and that the Universe extends so in infinitum.

In so many and such important ways, then, do the planets bear witness to the earth's mobility.

Revolution is like Saturn, it devours its own children.

We have one planet in our solar system that's habitable, and that's the Earth, and space travel can transform things back here for the better. First of all, by just having people go to space and look back on this fragile planet we live on. People have come back transformed and have done fantastic things.

There's no rest when you're on planetary duty.

My vision is for a fully reusable rocket transport system between Earth and Mars that is able to re-fuel on Mars - this is very important - so you don't have to carry the return fuel when you go there.

Either you repeat the same conventional doctrines everybody is saying, or else you say something true, and it will sound like it's from Neptune.