 Why are Bal and Ethaniel so cold?
A gentle fancy for the Christmas Season—an oft-told tale with a wistful twistful of Something that left the Earth with a wing and a prayer. But this vast distance did not mean that isolation could endure forever. Instruments within the ship intercepted radio broadcasts and, within the hour, early TV signals. "It's not what they've done," said Bal, the second alien. "I may remind you that in two months twenty-nine days we're due in Willafours," said Bal. A meteor shower could pass over and their clumsy instruments could interpret it as an all-out enemy attack." They went much closer to Earth, not intending to commit themselves. Atmospheric analysis showed that as far away as we were."
 Bal and Ethaniel are cold because it is winter where they have landed on Earth.
 People are mistaking them for the types of angles seen in Renaissance paintings. It is likely they are wearing little or no clothing.  They are cold because the clothing synthesizer on their spaceship was not equipped with the materials needed to make cold-weather gear.  They are cold because the planet they come from has a much warmer climate, and they were not prepared for cold weather.  Bal and Ethaniel are cold because it is winter where they have landed on Earth.