Before 1995, the only planets we knew about were the…

The gas-giant planets in our solar system all have large moons.

— Debra Fischer

When I was a little kid, we only knew about our nine planets. Since then, we've downgraded Pluto but have discovered that other solar…

— Buzz Aldrin

Venus and Mars are our next of kin: they are the two most Earth-like planets that we know about. They're the only two other…

— David Grinspoon

When I was a kid, I was obsessed with different planets in the solar system, and I used to create, for every single planet,…

— James Gunn

Sense can support herself handsomely in most countries on some eighteen pence a day; but for fantasy, planets and solar systems, will not suffice.

— Thomas B. Macaulay

Pluto and its brethren are the most populous class of planets in our solar system.

— Alan Stern

Because Alpha Centauri is so close, it is our first stop outside our solar system. There's almost certain to be small, rocky planets around…

— Debra Fischer

I used to be a strong believer that we would eventually colonize the solar system the way it's been done in science fiction many,…

— Alastair Reynolds

When we get out to other planets in the solar system, we'll use the gravitational pull of each planet to help launch us to…

— Jack Swigert

Estimates are that at least 70 per cent of all stars are accompanied by planets, and since the latter can occur in systems rather…

— Seth Shostak

A century ago, scientists believed there was only one obvious stomping ground for alien biology in our solar system: Mars. Because it was reminiscent…

— Seth Shostak

We may regard the solar systems as separate sponges, swimming in a World of Divine Spirit, and thus it will be apparent that in…

— Max Heindel

One of the implications of the discovery of the Kuiper Belt and its many small planets is that many scientists now think of the…

— Alan Stern

The planet Earth, though not threatened with destruction by man-made global warming, is by no means indestructible. There are many unpredictable events within our…

— Paul Johnson

I don't think Brian Cox does 'The Wonders of the Solar System' because he believes the world would be a better place if people…

— Tim Harford