Planet-like object may have spent its youth as hot as a star

5 agosto 2014

Astronomers have discovered an extremely cool object that could have a particularly diverse history – although it is now as cool as a planet, it may have spent much of its youth as hot as a star. The current temperature of the object is 100-150 degrees Celsius, intermediate between that of the Earth and Venus. But the object shows evidence of a possible ancient origin, implying that a large change in temperature has taken place.