 How do moon inhabitants tell the time of day?
It was just before sunset on a spring evening in September in Sydney. The shadow line between day and night could be seen from the Moon to be drifting across Australia. Evans, who had no watch, thought of the time as a quarter after Australia. They might have appeared to waver slightly, if they were behind outflung corona flares. Morning to him had no meaning at all, but he thought in the strictest sense that it would be morning on the Moon for another week. The solar furnace was a rough parabola of mirrors used to focus the sun's heat on anything that it was desirable to heat. It was used mostly, from sun-up to sun-down, to supplement the nuclear power plant.
 Identifying the shadow line as it relates to Earth's continents
 Identifying the shadow line as it relates to Earth's continents  Identifying the shadow line as it relates to the moon's time zones  Identifying the shadow line as it relates to the moon's continents  Identifying the shadow line as it relates to the Earth's time zones