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www.timeanddate.com/astronomy/moon/tides.html

The oceans bulge. (Not to scale.) At New Moon and Full Moon the gravitational force of the Sun and the Moon act together and create spring tides. (Not to scale.) While both the Moon and the Sun influence the ocean tides, the Moon plays the biggest role because it is so much closer to our planet than the Sun.

www.lunarland.com/moon-and-ocean-tides

Moon & Ocean Tides; HOW IS THE MOON AND OCEAN TIDES ASSOCIATED? Almost everyone is aware of the role that gravity plays in our lives. Not only does it keep our feet planted firmly on the ground, but it also keeps order in the solar system. The gravitational forces associated with the Sun and the planets interact to describe the orbits that we ...

oceanservice.noaa.gov/education/tutorial_tides/tides02_cause.html

The relationship between the masses of the Earth, moon and sun and their distances to each other play critical roles in affecting tides. Click the image for a larger view. Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the ...

sciencing.com/relationship-between-moon-phases-tides-5038199.html

Low tides are the receding waters between the high tides. In some places, low tide can be only a few feet, while in others the ocean can recede much farther. High and low tides both appear two times each in a 24-hour day, but since the moon rises 50 minutes later each day, the tide cycles will differ by the same 50 minutes daily.

www.moonconnection.com/tides.phtml

The Ocean's Tides Explained The alternating pattern of rising and falling sea level with respect to land is what we know as the tides. What causes this "motion of the ocean"? In one word, gravity. Specifically, the gravitational forces of the Sun and Moon.

earthsky.org/earth/tides-and-the-pull-of-the-moon-and-sun

The moon and sun are primarily responsible for the rising and falling of ocean tides. However, for any particular spot on Earth’s surface, the height of the tides and their fluctuation in time ...

sciencing.com/effects-moon-phases-ocean-tides-8435550.html

Ocean tides are caused by the complex interplay of three astronomical bodies: the Sun, the Earth and the Moon. Both the Sun and the Moon exert a gravitational pull on the Earth's water. The resulting force of the Moon's gravity creates two tidal bulges on opposite sides of the Earth.

en.wikipedia.org/wiki/Tide

The time taken for the wave to travel around the ocean also means that there is a delay between the phases of the Moon and their effect on the tide. Springs and neaps in the North Sea, for example, are two days behind the new/full moon and first/third quarter moon. This is called the tide's age.