Is it true that there are some moons in our Solar System that are only a a mile in diameter?
- tham153Lv 72 months agoFavorite Answer
Several of Jupiter's 79 moons are believed to be a mile or less in diameter. Some examples: S/2003 J10; Kallichore; S/2010 J 1 (believed to be the smallest yet discovered, 0.6 mile diameter)
Saturn's 82 moons include several very small. S/2009 S 1 may be only 1300 feet across.
You might be interested in my book "Moons of the Solar System; revised second edition", 2019
- 2 months ago
Yup; Moons can be very large - like Jupiter's Ganymede, or very small - down to the size of sand grains like those in Saturn's rings... although, the term "moon" usually refers to larger bodies. I believe the smallest named moon is Deimos, the smaller moon orbiting Mars - it's about 7 miles across.
- CarolOklaLv 72 months ago
There are many moonlets that are the size of dust particles or soot, nanoparticles. That's what planetary rings are. A mile in diameter is?a big boulder, an asteroid. They get captured gravitationally. Sometimes they gain enough velocity and momentum to reach escape velocity and orbit the Sun.
- Anonymous2 months ago
Yes, 79 identified moons of Jupiter down to 1km, and moonlets besides. Saturn has moons and rings, and the rings can be considered particles of moons.
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- 2 months ago
The smallest moon is Deimos, at Mars, only seven miles in diameter, although its size now is rivaled by the small shepherd moons discovered by Cassini at Saturn and by others yet to be counted and named in the rings around Jupiter.