Topic > The observation of the Moon and the tides - 961

The observation of the Moon was conducted from Friday 8 November 2013 to Thursday 14 November 2013. The study of the Moon during this period took place constantly between 8 am and 9:00 PM EST in the Northern Hemisphere at 37.3346° N, 79.5228° W (Bedford, VA). It was noticed that the Moon was illuminated on the right side and had a dark shadow on the left side indicating a waxing phase. The bright region grew on the Moon's surface with each subsequent night. The phase of the first night was that of the waxing crescent with over 25% of the Moon illuminated. By the next night, the light had grown to cover more of the Moon as it continued in its waxing phase. On November 10, the Moon appeared to be at first quarter or crescent because at least 50% of its surface was illuminated. Over the next several nights, the Moon exhibited characteristics of gibbous growth as light continued to grow across the lunar surface from right to left. On November 14, the Moon was approaching the full moon phase as only a very small dark shadow was visible on the left side. The Moon takes 27.3 days (sidereal month) to complete its actual orbit around the Earth. Like the Sun, the Moon rises in the east and sets in the west every day. The timing of moonrise and moonset depends on the phase of the moon and occurs approximately 50 minutes later each subsequent day. A person on Earth can only see a part of the Moon illuminated by the Sun, which can reach 59% of the lunar surface depending on its phase. The rest of the Moon's surface never faces Earth since the Moon's rotation has exactly the same speed as its orbit. The line that separates the illuminated portion of the Moon from... half of the chart... nal, mixed and diurnal. Semidiurnal tides have two high tides and two low tides of similar height. Mixed tides have two high and two low tides that differ in height. A high and low tide characterize diurnal tides. Two tidal phenomena also occur each month, due in part to the Moon's cycles. The Earth, Moon, and Sun are in almost perfect alignment twice a month during the new and full moons. The gravitational pull of the Moon and Sun combine during this period to cause the oceans to swell more than normal. As a result, high tides are higher and low tides are lower than usual. These tides, known as spring tides, are very strong. The Sun and Moon are perpendicular to each other during the first and last quarter moons, which causes weaker quadrature tides. Neap tides are slightly lower high tides and slightly higher low tides.