Discovering that our solar system has many more planets than we ever expected, and that most of them are ice dwarfs rather than like Earth and the other rocky terrestrials, is just another step in the revolution in viewpoint that… — Alan Stern Copy Share Image
Human beings have long wondered whether they are alone in the universe. — Alan Stern Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
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 Copy Share Image
To keep everyone invested in your vision, you have to back up a little bit and really analyze who the different stakeholders are and… — Alan Stern Copy Share Image
