Newly found brown dwarf is ultra-cool: Now Kevin Luhman of Pennsylvania State University in University Park and colleagues have used NASA's infrared Spitzer Space Telescope to detect the glow of what appears to be a brown dwarf at just 30 °C...
The object is a lot hotter than Jupiter, which is at a frigid -149 °C, and much cooler than the next coolest brown dwarf, at 100 °C. This means that WD 0806-661 B will act as a "missing link" to reveal how temperature affects the atmosphere and spectral features of objects that are roughly the size of Jupiter.
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