🌌🐈Gattini&Universo🐈🌌

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What is a moon and its main criteria?

We have already specified the main features of a star and a planet, let’s now also clarify what a moon is.

It would be incorrect to limit the definition of a 🌕 as any celestial object that revolves around a planet, because that would mean dust particles also fall under that category.

According to the International Astronomical Union (IAU), to be called a moon, a celestial body must satisfy the following 3️⃣ criteria:

✅ It must be in a heliocentric orbit (it must revolve around its planet, and together they both must revolve around the Sun).

✅ It should be roughly spherical in shape, but smaller than the planets (if its size is comparable to its host planet, then it would be a planet by itself, not a moon). Exception: captured asteroids don’t satisfy this criterion.

✅ It has to be massive enough to clear most of its orbit of debris so that it is the only dominant celestial body in its orbit.

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3.7K viewsNov 6, 2022 at 21:43

What is a moon and its main criteria?

We have already specified the main features of a star and a planet, let’s now also clarify what a moon is.

It would be incorrect to limit the definition of a 🌕 as any celestial object that revolves around a planet, because that would mean dust particles also fall under that category.

According to the International Astronomical Union (IAU), to be called a moon, a celestial body must satisfy the following 3️⃣ criteria:

✅ It must be in a heliocentric orbit (it must revolve around its planet, and together they both must revolve around the Sun).

✅ It should be roughly spherical in shape, but smaller than the planets (if its size is comparable to its host planet, then it would be a planet by itself, not a moon). Exception: captured asteroids don’t satisfy this criterion.

✅ It has to be massive enough to clear most of its orbit of debris so that it is the only dominant celestial body in its orbit.

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BY 🌌🐈Gattini&Universo🐈🌌