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Planets are too dim to be detected with existing equipment, far away, except in these very special circumstances where they're seen by their gravitational effect.

The planets and moons of our solar system are blatantly visible because they reflect sunlight. Without the nearby Sun, these planets would be cryptic and dark on the sky.

Do not look at stars as bright spots only. Try to take in the vastness of the universe.

It bears mentioning that the Milky Way is only one of 150 billion galaxies visible to our telescopes - and each of these will have its own complement of planets.

The stars don't look bigger, but they do look brighter.

One in 200 stars has habitable Earth-like planets surrounding it - in the galaxy, half a billion stars have Earth-like planets going around them - that's huge, half a billion. So when we look at the night sky, it makes sense that someone is looking back at us.

Everybody has busy lives, but you can tell people, 'Go outside and look at the night sky. We've been able to demonstrate that every star you see probably has a planet around it.'

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.