penis
The unit of measurement most useful for a baseball's weight is ounces.
Not sure whether it is in any way more "useful", but a common unit of measurement for distances within the Solar System is the AU.SI units, especially meters and kilometers, are also used, though.
Unless you are already in the city, the most useful measurement unit would be miles or kilometers.
au
Interesting is an opinion but the earth is useful for forming life.
A measurement conversion calculator enables the user to switch from various international units of measurement. The most useful features for such a calculator would include a wide variety of units that can be converted, accuracy, and ease of use.
The most common measurement for weight is kilograms (kg). That is the metric S.I. (systéme internationale d'unites) unit for weight.
mass of the planet and the distance from the sun
Meters
The period of revolution of a planet is most closely related to its distance from the sun. The further a planet is from the sun, the longer it takes to complete one revolution.
there aren't any planets on earth, all the planets are in space, but the most important planet to us or the most useful is earth..
Milligrams. 1/1000th of a gram.