Legend says that the Chinese calendar was used for the first time by emperor Huang Di in 2637 BC. The calendar is lunisolar, based on astronomical observations. Chinese date calculation determines Chinese New Year as the day of the second New Moon (rarely the third) after the winter solstice. In the Gregorian calendar that means [...]
Mercury is the planet that is the closest in distance to the Sun in the solar system. It is difficult to view this planet since the sunlight bouncing off it makes it quite glaring. Although there were two spaceships sent out to gain more information from Mercury, not much could be found out. But soon, [...]