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Parker Solar Probe flies at 430,000 mph

At its closest approach to the Sun, Parker Solar Probe travels at about 430,000 miles per hour.

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That is fast enough to get from Philadelphia to Washington, D.C., in one second.

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A canyon on Mars would span the United States

Valles Marineris on Mars is long enough to stretch from California to New York.

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Comets have two tails

A comet has two tails, one of dust and one of ionized gas.

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Pluto is about half as wide as the United States

Pluto is only about 1,400 miles wide, roughly half the width of the United States.

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