Are governments the only entities that can build human spacecraft? No - actually, every human spacecraft ever built for NASA was built… — Alan Stern Copy Share Image
When I started working with NASA in 1989 as part of a mission to send spacecraft to Pluto, I knew it would… — Alan Stern Copy Share Image
It is only by freeing NASA from routine human transport to low-Earth orbit that we can afford to once again see American… — Alan Stern Copy Share Image
The costs of badly-run NASA projects are paid for with cutbacks or delays in NASA projects that didn't go over budget. Hence… — Alan Stern Copy Share Image
As a scientist in charge of space sensors and entire space missions before I was at NASA, I myself was involved in… — Alan Stern Copy Share Image
There was a time when Pluto - which NASA's New Horizons spacecraft at last explored in 2015, a mission I led -… — 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
