“If you put Earth out beyond Neptune, you wouldn't be able to call it a...” — Alan Stern Quote

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

“New Horizons isn't just visiting Pluto; it's visiting this entire region. Whatever it finds, this will be a signal moment for planetary exploration - the capstone to our first reconnaissance of the planets of our solar system.”

“Pluto is as far across as Manhattan to Miami, but its atmosphere is bigger than the Earth's.”

“We really have only been observing Neptune with big telescopes since shortly before 1989.”