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Centimeter

A centimeter (cm) is a unit of length in the metric system. It is commonly used to measure small objects or short distances. One centimeter is equal to one-hundredth of a meter, meaning 100 centimeters make 1 meter. In everyday life, centimeters are used to measure height, the size of books, or dimensions of furniture. For example, a pencil might be about 15 cm long. The symbol for centimeter is "cm", and it is widely used around the world, especially in countries that follow the metric system. Rulers and measuring tapes often include centimeter markings to help with precise measurements. The centimeter is a practical and easy-to-use unit that helps in getting accurate sizes for various items.

Astronomical Unit

An astronomical unit (AU) is a unit of distance used in astronomy to describe the average distance between the Earth and the Sun. It equals about 149.6 million kilometers (or about 93 million miles). The AU is useful for measuring distances within our solar system, such as the distance from Earth to other planets. For example, Mars is about 1.5 AU from the Sun. Using the AU makes it easier to understand and compare distances between planets without dealing with very large numbers. The symbol for astronomical unit is "AU".