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I think the universe is pure geometry - basically, a beautiful shape twisting around and dancing over space-time.

The universe is fractal. The closer you look at it, the more interesting it becomes.

The Earth - from our altitude at Hubble, we're 350 miles up. We can see the curvature. We can see the roundness of our home, our home planet. And it's the most magnificent thing I've ever seen. It's like looking into Heaven. It's paradise.

One of the great challenges of modern cosmology is to discover what the geometry of the universe really is.

First of all, we must note that the universe is spherical.

The universe is wider than our views of it.

Of all celestial bodies within reach or view, as far as we can see, out to the edge, the most wonderful and marvellous and mysterious is turning out to be our own planet earth. There is nothing to match it anywhere, not yet anyway.

Middle-earth is a universe I know very well.

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.

If our local, observable universe is embedded in a larger structure, a multiverse, then there's other places in this larger structure that have denizens in them that call their local environs the universe. And conditions in those other places could be very different. Or they could be pretty similar to what we have here.