Back Quote by Alan Stern

Competition-driven innovation and price pressure that commercial practices foster can only make human spaceflight ever more common and U.S. leadership in this domain ever…

— Alan Stern

Of course Pluto is a planet: It's massive enough to have its shape controlled by gravity rather than material strength, which is the hallmark…

— Alan Stern

It used to be said that Pluto is a misfit. But now we know Earth is the misfit. This is the most populous class…

— Alan Stern

The Kuiper belt region, which I call the third zone because it lies beyond the rocky terrestrial planets and beyond the giant planets, is…

— Alan Stern

I think if you were between maybe 6 and 16, there was nothing like Apollo, and I wonder if there can be something like…

— Alan Stern

If you put Earth out beyond Neptune, you wouldn't be able to call it a planet because it couldn't clear its zone.

— Alan Stern

Why would you listen to an astronomer about a planet?

— Alan Stern

When we first sent missions to Jupiter, no one expected to find moons that would have active volcanoes. And I could go down a…

— Alan Stern

Pluto is still active four and a half billion years into its history. It was expected that small planets like Pluto would cool off…

— Alan Stern

The Kuiper Belt is the largest mapped structure in our planetary system, three times as big as all the territory from the sun out…

— Alan Stern

If two billion people wanted to watch a robot fly by Pluto, imagine what it will be like when the first humans step on…

— Alan Stern

We're going to find Marses and maybe Earths out in the solar system's attic of the Oort Cloud and the Kuiper Belt.

— Alan Stern