What is the smallest planet in the galaxy?

Answer 1

The smallest planet in our solar system is Mercury. It's the smallest known planet in our galaxy, since we would not be able to see one that small in any other far off systems. smaller planets could exist, would they still have to fulfil the same criteria? Ceres, a dwarf planet is only 900km in diameter. This is about the limit, much smaller than this and the planet would struggle to hold a spherical shape.

Answer 2

Mercury is the smallest planet in our solar system. It is about one-third the size of Earth and has a diameter of about 4,880 kilometers.

Answer 3

The Galaxy Wilman 1 is estimated to have only about 500,000 stars making it the smallest galaxy in the universe,or at least eh smallest we can observe from earth.

Answer 4

In our solar system, the smallest planet is Pluto. Since Pluto is so small, it is not considered as a planet in our solar system anymore. It is a dwarf planet.