New Moon - The Moon is between Earth and the sun, so the side we see is dark (in other words, it's invisible to the eye).
What are Moon phases?According to NASA, the Moon takes about 29.5 days to orbit the Earth. Over the course of this period, it moves through eight recognisable phases. While the same side of the Moon always faces us, the amount of its surface lit by the Sun changes as it continues along its path. The shifts in sunlight create the different appearances we see from Earth, ranging from a fully illuminated Moon to a thin sliver or near darkness. The eight phases are:
。im钱包官方下载对此有专业解读
understood by beginners and advanced users alike.
"If we're producing technology our customers can't live with, that's our failing," he says, explaining that FireAngel alarms have been calibrated to avoid making them overly sensitive, in order to reduce false alarms.