Why is the moon that special? Is it really a well built coincidence? [duplicate]

I find it funny that the moon is the only object in the solar system to almost perfectly fit the sun, resulting in the spectacular solar eclipses. No other object except maybe a few irregular moons like Pandora from Saturn would do that, and for them, they aren't round, and thus can't fully block out all light. The moon also has a perfect rotation that is almost exactly the same as Earth's rotational period, resulting in a tidal lock, which causes tides.

Is this a coincidence? Any speculation on why this happens? Is this the only observed place where such criteria play into such perfect coincidence?

• If it were really special, there would be a total eclipse every new Moon and every Full Moon. :-) Mar 15, 2019 at 2:43
• @JohnHoltz well its orbit is tilted, but still these two coincidences... what resulted in them? Mar 15, 2019 at 2:47
• -1 and vote to close for primarily opinion-based for explicitly requesting speculation!
– uhoh
Mar 15, 2019 at 5:15
• The moon also has a perfect rotation that is almost exactly the same as Earth's rotational period What?! The Moon's rotational period is nearly 30 times longer than Earth's. Mar 15, 2019 at 6:17
• First about Moon's roundness: Moon is pretty big, so its gravitation forces pull down all of the material so it shapes round. And about "coincidence": there are a lot of moons in the Universe. Some of them are rounded and have the same angular diameter as their star. But this isn't so rare. Mar 15, 2019 at 17:28