Author: Alan Stern

Quotes

People know a planet when they see one, and I think that's a pretty darn good test, in fact, for planethood.

People know a planet when they see one, and I think that's a pretty darn good test, in fact, for planethood.

- Alan Stern

A river is a river, independent of whether there are other rivers nearby. In science, we call things what they are based on their attributes, not what they're next to.

A river is a river, independent of whether there are other rivers nearby. In science, we call things what they are based on their attributes, not what they're next to.

- Alan Stern

We're in the space exploration business, and the outer solar system is a wild, wooly place. We haven't explored it very well.

We're in the space exploration business, and the outer solar system is a wild, wooly place. We haven't explored it very well.

- Alan Stern

Even in our deep ocean, there are ecosystems at work with no light whatsoever down in the deepest portions of the oceanic abyss.

Even in our deep ocean, there are ecosystems at work with no light whatsoever down in the deepest portions of the oceanic abyss.

- 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 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

The big lesson of planetary science is when you do a first reconnaissance of a new kind of object, you should expect the unexpected.

The big lesson of planetary science is when you do a first reconnaissance of a new kind of object, you should expect the unexpected.

- Alan Stern

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