Chances are the lake closest to you is a freshwater lake. But some lakes are extremely salty. These are called saline lakes. Although freshwater lakes often have minor amounts of dissolved salts in them (less than 1-3 g/L), saline lakes have more than this (between 3 and 300g/L).
Astronomical Unit (A.U.). An astronomical unit (A.U.) is the average distance between the Earth and the Sun, which is about 93 million miles or 150 million kilometers.Astronomical units are usually used to measure distances within our solar system.ne kiloparsec (kpc), is one thousand parsecs. One megaparsec (Mpc) is one million parsecs. SUMMARY 1 Astronomical Unit (A.U.) is the average distance between the Sun and the Earth. 1 A.U. = 93 million miles = 150 million kilometers 1 light-year (ly) is the distance that light travels in one year in a vacuum.
If you look up Earth in wikipedia you would see the distance to the sun at perihelion (closest point to the sun) and aphelion (farthest point from the sun). Earth's orbit is elliptical, so it isn't exactly the same distance from the sun all the time. The average distance is 149,597,880 km (around 93 million miles). Marshmallow, there is a distance of 93,000,000 miles between the Earth an the Sun. 1 Au= 93,000,000 miles .