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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 of planethood.

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 of planethood.


Alan Stern  Alan Stern
Tags: Work  History  Interesting  Place  Need   

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Author introduction

Sol Alan Stern (born November 22, 1957) is an American engineer and planetary scientist. He is the principal investigator of the New Horizons mission to Pluto and the Chief Scientist at Moon Express.[3][4]

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If two billion people wanted to watch a robot fly by Pluto, imagine what it will be like when the first humans step on Mars. It'll be the most unifying event anybody could ever put on.

    Alan Stern  Alan Stern   
 Tags: Step People Fly Will Watch Robot
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We made more than just scientific discoveries... we rediscovered how much people love exploration.

    Alan Stern  Alan Stern   
 Tags: Love People Exploration More Made
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You could not have predicted the amazing discoveries at Pluto, even though we have been to a couple of objects in the solar system that were at least a little analogous to Pluto.

    Alan Stern  Alan Stern   
 Tags: Amazing You Solar Little System
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We were very surprised to find out that Pluto is still geologically alive. It has upended our ideas of how planetary geophysics works.

    Alan Stern  Alan Stern   
 Tags: Ideas Alive Find Still Pluto How
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If the Pluto mission was a cat, then it would've been dead long ago because they only get nine lives, and we've had significantly more than nine stoppages and odd twists and turns.

    Alan Stern  Alan Stern   
 Tags: Mission Long Cat Dead More Only
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People ask, 'What are the scientific questions you're going to answer?' New Horizons doesn't have any of those; it's purely about raw exploration... We're not 'rewriting the textbook' - we're writing the textbook from scratch.

    Alan Stern  Alan Stern   
 Tags: Writing People Questions Exploration
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Pluto has strong atmospheric cycles: it snows on the surface; the snows sublimate and go back into the atmosphere each 248 year orbit.

    Alan Stern  Alan Stern   
 Tags: Strong Back Go Year Surface Orbit
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Pluto has a very interesting history, and there is a lot of work that we need to do to understand this very complicated place.

    Alan Stern  Alan Stern   
 Tags: Work History Interesting Place Need
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