Contrast the Sun's gravitational pull on Earth when Earth is closest to the Sun and when
Earth is farthest from the Sun.

The solstices and equinoxes, and the number of hours of daylight associated with each, are major factors in the seasons. use the drop-down menus to identify the month when each of these events occurs. the winter solstice in the northern hemisphere: an equinox in both hemispheres: the summer solstice in the northern hemisphere:

What was istanbul called before he ottomans conquered the city in the 15th century

Why did other countries want to have a part in what was occurring in southwest asia?