The Moon is the only nature satellite of Earth (a satellite is an object that orbits planet). It takes 29.5 days to complete one orbit

Most people are already familiar with the idea of high and low tides, but where do they come from? What causes this movement and why does it occur with such regularity? 

Nicknamed "blood moon," some ancient cultures regarded a total lunar eclipse as an ominous event. Today, this celestial phenomenon generates excitement and wonder. Unlike a solar eclipse, which may require travel to see, total lunar eclipses can often be observed from the entire nighttime-half of the Earth. Learn what causes a lunar eclipse and how it gains its crimson coloring.

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A total solar eclipse happens somewhere on Earth once every year or two. What is an eclipse? Learn more about how solar eclipses happen, the four types of eclipses, and how to view the sun safely if you're within the path of totality.

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