Sentence:  This result suggests a very high temperature at the solid surface of the <WSD>planet</WSD> , although there is the possibility that the observed radiation may be a combination of both thermal and non thermal components and that the observed spectrum is that of a black body merely by coincidence . 
Meaning of the word marked with <WSD> tags:  (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction