3. Can moons have moons?

We know that the moon revolves around the Earth, that the Earth revolves around the Sun, the Sun rotates inside the Milky Way, and that the Milky Way orbit inside a local group, etc. But the question is: Can moons orbit other moons?

The short answer will be: Yes, but is extremely difficult. If this happens, it would last a short time.

If somehow appeared a moon orbiting another planet and there is a closer one, because the planet has a bigger gravitational force, the new moon would be doomed to crash into the planet sooner or later. This would last a few hundred years. To make it easier, an example: Imagine that in the moon appears somehow, another moon (let's call her Moon 2) orbiting. It could go on a few years until Moon 2 impact with the Earth or the moon. It depends on the size, if it is larger than the moon, this will end up impacting with Moon 2; if it is smaller, it will happen backwards, etc.

As the astronomer Seth Shostak said " There should be a large space between the moon and the planet." Orbting far from this, perhaps the moon could support its own satellite.

Japeto's mountain range

We know that Saturn has 62 moons found and among them there is one that is a bit more important to this question: It's called "Japeto". It has an equatorial mountain range of 20 km high and measures a little more than three quarters of the circumference of the satellite. Astronomers was surprised because of the mountain range and, while they were investigating, they supposed that, in the past, could be another moon orbiting it. But it is only a thought! If this were real, it would be known more precisely if a moon can orbit another or not.

MÓNICA GARCÍA