How often do moons eclipse one another?

Question by Arex: How often do moons eclipse one another?
In my fantasy book series, the world I write about has got two moons. I thought it would be fun to build a festival around a idea where once a year one of the moons eclipses the other. Scientifically, how far-fetched is this idea? For instance on Mars, do Phobos and Deimos ever eclipse one another and how often does it happen? I'm not opposed to stretching the truth just a bit since it is a fantasy book, but if it's completely scientifically ludicrous or impossible, I'd rather not include it. Thanks for the help


Best answer:
Answer by Big DaddyMartian moons are very different from the earth's moon. I don't think they're relevant.

There's no particular reason that some moons around a planet couldn't undergo periodic or semi-periodic eclipses. The idea that a earth-like planet may have two or more large moons may be the less likely aspect.

But we don't have a lot of samples (just the planets in this solar system) to judge by. So having eclipsing moons in a story isn't beyond any plausibility limit that I'd worry about.

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Does the November 28, 2012 lunar eclipse have prophetic significance? Exactly 65 years ago, just before the UN General Assembly voted to partition Palestine and give land to the Jews, a penumbral lunar eclipse occurred. This very same type of eclipse occurred last night before the UN General Assembly is to vote on upgrading Palestine's status and therefore recognize them as a state and therefore possibly divide the land of Israel. Simply interesting... or prophetic? You decide. But watch my video first ;)
Video Rating: 4 / 5

Total Solar Eclipse | Solar Eclipse Information