This Photo of Pluto Is Worth Sharing:

Today, Dr. John P. Holdren — the President's science advisor — sent the following message to the White House list, sharing a brand-new photo of Pluto. The photo, from NASA's New Horizons interplanetary probe, is the sharpest photo ever seen of the "dwarf planet."

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This morning, the United States became the first country to reach Pluto — and the first country to explore the entire classical solar system: Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.

NASA's New Horizons interplanetary probe has been making its way to Pluto since January 19, 2006, and has been providing the world with the sharpest photos ever seen of our Solar System's most prominent "dwarf planet." Today, it made its closest approach to Pluto yet — about 8,000 miles — at around 07:49:57 EDT.

Here's the photo they took — which, despite traveling at the speed of light (186,000 miles per second), took four and a half hours to reach us here on Earth as it crossed the 3 billion miles between here and Pluto:

The closest photo we've taken of Pluto.

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