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Darkest Planet Found: Coal-Black, It Reflects Almost No Light

August 12, 2011 Comments off
Newfound world is off-the-charts dark—and the cause is a mystery, experts say.
The newfound gas-giant planet TrES-2b is black with a slight red glow, experts estimate.

An illustration shows a newfound exoplanet. Illustration courtesy David A. Aguilar, CFA

Andrew Fazekas

It may be hard to imagine a planet blacker than coal, but that’s what astronomers say they’ve discovered in our home galaxy with NASA’s Kepler space telescope.

Orbiting only about three million miles out from its star, the Jupiter-size gas giant planet, dubbed TrES-2b, is heated to 1,800 degrees Fahrenheit (980 degrees Celsius). Yet the apparently inky world appears to reflect almost none of the starlight that shines on it, according to a new study.

“Being less reflective than coal or even the blackest acrylic paint—this makes it by far the darkest planet ever discovered,” lead study author David Kipping said.

“If we could see it up close it would look like a near-black ball of gas, with a slight glowing red tinge to it—a true Read more…

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