Most planets are found because they give off a little heat that they absorbed from nearby stars. Heat is also called “infrared light.” The darkest planet ever found basically absorbs all light without giving it back off, including the infrared light most planets give off.
Astronomy Fact: The darkest planet ever found...
TrES-2b, also known as Kepler-1b, is the darkest planet ever discovered. Also called the planet of eternal night.
It's a gas giant planet that's larger than Jupiter and reflects less than 1% of the light that hits it.
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