If planet Earth had two moons, would that affect our ocean?


also what about the sloar eclipses would be have two at the same time or more frequent solar eclipses or what?

19 Answers

  • 1 decade ago
    Best Answer

    The oceans on Earth would definitely be affected by the presence of another moon, because the Moon (and also the Sun) are the reasons why we experience tides at all. If there was two moons around Earth, the amplitude (size) of the tides might be smaller or larger, since the effects of each other could cancel out or add up. There could also be more than two high tides per day, and the cycle of the tides could be less regular than it is.

    Here's some other ways it might affect the earth just in case you're wondering!

    If Earth had two moons, there would be more solar eclipses. These two things would probaly be the more noticeable effects. Thats's because the seasons and the variation of temperature over the course of the year are caused by the orbit of the Earth around the Sun, and the fact that the Earth's rotation axis is tilted. We wouldn't notice any chages in the course of the seasons. As for our body cycles, there are no scientific theories relating them to the presence of the Moon.


  • 1 decade ago

    Earth already has two main sources of tides: The Sun and The Moon. If either were missing, you would still see the other body's tides. One body would create a simple high and low tide that would be more or less periodic and with little difference between one cycle and the next. (The Earth's distance to the Sun and Moon varies over time, so tidal effects of each one increase or decrease as the distance decreases or increases).

    These two cycles have a cumulative effect, just as all waveforms do. When the Moon is at a right angle to the Earth-Sun line (first and third quarter phase moons), the Moon's low tide coincides with the Sun's high tide, and vice versa, which is the minimal difference in daily high and low tides. We call this a neap tide.

    When the three line up, the high and low tides coincide with each other, causing the maximum difference in the two, which we call a spring tide. This happens during full and new moons.

    Now add a third daily tide cycle, and rotate it around the calendar at some third rate of change. This would create a more complex system of tides, depending on the alignment of the 4 bodies. When all 3 tide curves lined up, the spring tide would be even higher and lower than Earth's currently are with one moon.

  • 3 years ago

    Earth Had Two Moons

  • 1 decade ago

    It would depend on the mass of the additional moon, it's orbital velocity, and distance from the earth. Tides would be much different - probably greater at certain times of the day, month or year, all depending on the orbit of the additional moon. Maybe sometimes the gravitational force would be in opposition, additive or at right angles....it would be a much different ocean.

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  • 1 decade ago

    Yes. That would actually affect our oceans immensely. as you probably already know, ocean tides are caused by the sun and the moon (although mainly the moon because it is much closer). If there were two moons, the tides would be nearly doubled and you could imagine what this could do to costal cities and amateur surfers. :)

  • 1 decade ago

    Yes it would effect our tides. To what degree would be proportional to a couple of factors such as size of the satellite and distance it is from Earth for example.

  • 1 decade ago

    Most likely it would, but it would depend on the size of the second moon and it's proximity to the planet.

  • Anonymous
    1 decade ago

    Yeah, we'd have some pretty wacky tides

  • 1 decade ago

    Yes it would be brighter at night during two full moons.

  • 1 decade ago

    Its impossible to tell, because no other planet in our observable view has oceans

    Source(s): space
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