One of the principal issues is that a lunar calendar year does not sync with a solar calendar year. There is approximately 11 days difference between the lunar and solar years. These 11 days, over ...

The calendar may depict a devastating comet strike and represent the earliest observations of solar and lunar movements.

“While Christmas is fixed to a solar calendar (and near the winter solstice), Easter is based on the lunar cycles of the Jewish calendar,” the almanac says. “In the Christian religion, the Last Supper ...

Future lunar bases could run on solar panels forged from molten moon dust, turning the Moon’s surface into an energy source, thanks to a new research breakthrough. Scientists at the University ...

The Chinese traditional calendar is lunar-solar. It's formed on the movement of the moon and the sun, so it considers both the moon's orbit around the Earth and the Earth's orbit around the sun.